An ISO/IEC 17025:2005 Standard - NABL Accreditation Certified Laboratory.

NDT TRAINING INSTITUTE IN CHENNAI - CENTRAL GOVT.APPROVED INSTITUTE IN INDIA..

NDT TRAINING INSTITUTE IN CHENNAI | NDT COURSE IN CHENNAI | NDT INSTITUTE IN CHENNAI | NDT TRAINING INSTITUTE IN CHENNAI | NDT TRAINING CENTER IN CHENNAI | NDT TRAINING CENTRE IN CHENNAI | NDT LEVEL I II COURSE IN CHENNAI | NDT IN CHENNAI | NDT COURSE CHENNAI PCN TRAINING IN INDIA, NDT COURSE IN CHENNAIPCN NDT TRAINING COURSE IN INDIA,PCN NDT IN CHENNAI, CSWIP WELDING INSTITUTE IN INDIA, CSWIP WELDING COURSE, PCN NDT IN TAMIL NADU, PCN NDT COURSE , PCN NDT TRAINING INSTITUTE IN CHENNAI, PCN TRAINING & CERTIFICATION IN INDIA, CSWIP WELDING TRAINING & CERTIFICATION IN INDIA.

  • Follow us
  • Follow us

NDT INSTITUTE - NDT TRAINING AND CERTIFICATION

1. Ultrasonic Testing

2. Radiographic Testing

3. Magnetic Particle

4. Penetrant Testing

5. Visual Testing

6. Radiographic Film Interpretation

7. Ultrasonic Thickness Measurement

8. Time of Flight Diffraction (TOFD)

9. Phased Array Ultrasonic Testing (PAUT)

10.TKY JOINTS

11.Eddy Current Testing (ET)

NDT TRAINING -Conventional NDT Course in Chennai

Basic Radiation Safety (BRS)

CSWIP Visual Inspector (Offshore)

Magnetic Particle Testing (MT)

Penetrant Testing (PT)

Radiation Protection Supervisor (RPS)

Radiographic Interpretation - Principles (Part A)

Radiographic Interpretation (RI) - Metal Welds (Part B)

Radiographic Interpretation (RI) - Metal Castings (Part C)

Radiographic Testing (RT) - Welds

Ultrasonic Corrosion and Erosion Monitoring

Ultrasonic Testing (UT) - Thickness Measurement

Ultrasonic Testing (UT) - Welds

Visual Testing (VT)

CSWIP 3.1 COURSE - WELDING TRAINING AND CERTIFICATION

CSWIP 3.0 Visual Welding Inspector - Level 1

CSWIP 3.0 Visual Welding Inspector - Level 1 (Mandarin)

CSWIP 3.0 Plus - Visual Welding Inspector with Practical Module - Level 1

CSWIP 3.1 Welding Inspector - Level 2

CSWIP 3.1 Welding Inspector - Level 2 (Mandarin)

CSWIP 3.2 Senior Welding Inspector - Level 3

AWS - WELDING TRAINING AND CERTIFICATION

AWS CWI to CSWIP Welding Inspector - Level 2

AWS CWI to CSWIP Welding Inspector - Level 2 (Mandarin)

Welding Procedures and Welder Qualification

ASME IX Welding Standards

European Welding Standards

Welder Training and Qualification

Overview

API COURSES IN CHENNAI- Plant Inspection/Asset Integrity Management

API Examination Preparation Courses API 510 Pressure Vessel Inspector Examination Preparation Course

API 653 Aboveground Storage Tank Inspector Examination Preparation Course

API 570 Piping Inspector Examination Preparation Course

CSWIP 3.1 Training in Chennai - Plant Inspector - Levels 2/3

Module 2 Damage Mechanism Assessment for RBI and FFS, based on API RP 571

Module 3 Risk Based Inspection (RBI) based on API and ASME

Module 4 Fitness-for-Service (FFS) Assessment, based on API 579-1/ASME FFS-1 2007

Module 5 Weld Repair of Pressure Equipment and Piping

Module 6 Pressure Vessel Inspection, based on API RP 510

Module 7 Piping Inspection, based on API RP 570

Module 8 Aboveground Tank Inspection, based on API RP 653

Introducing BS 7910:2013

Plant Inspection Overview

Structural Integrity Assessmen

BGAS-CSWIP COURSE IN INDIA

BGAS-CSWIP Agricultural & Environmental Inspector

BGAS-CSWIP Blast Cleaning/Preparation Operative Level 5A

BGAS-CSWIP Painting Inspector Grade 2

BGAS-CSWIP Painting Inspector Grade 1

BGAS-CSWIP Painting Supervisor Level 4

BGAS-CSWIP Pipeline Welding Inspector

BGAS-CSWIP Protective Painter/Sprayer Operative Level 5B

BGAS-CSWIP Site Coatings Inspector

ASNT/ACCP Level III PREPARATORY COURSE IN CHENNAI

Basic

Magnetic Particle

Penetrant Testing

Radiographic Testing

Ultrasonic Testing

NDT TRAINING IN CHENNAI | NDT COURSE IN CHENNAI | NDT INSTITUTE IN CHENNAI | NDT TRAINING INSTITUTE IN CHENNAI | NDT TRAINING CENTER IN CHENNAI | NDT TRAINING CENTRE IN CHENNAI | NDT LEVEL I II COURSE IN CHENNAI | NDT IN CHENNAI | NDT COURSE CHENNAI PCN TRAINING IN INDIA, NDT COURSE IN CHENNAI ,PCN INSTITUTE IN CHENNAI,PCN IN INDIA, CSWIP WELDING INSPECTOR COURSE , ASNT NDT COURSES, PCN NDT INSTITUTE IN INDIA,CSWIP WELDING INSTITUTE,PCN LEVEL II, CSWIP LEVEL II, ASNT LEVEL II TRAINING & CERTIFICATION INSTITUTE IN CHENNAI,INDIA..PCN TRAINING IN INDIA , CSWIP TRAINING IN INDIA WELDING INSPECTOR COURSE" NDT INSTITUTE IN CHENNAI, PCN NDT IN CHENNAI , PCN NDT IN INDIA, PCN NDT CENTRE IN INDIA, PCN NDT IN CHENNAI, CSWIP COURSE IN INDIA, CSWIP INSTITUTE IN CHENNAI , CSWIP 3.0, 3.1, 3.2 Course in chennai ,Cswip in India is committed to provide most effective training with the expertise gained over the past two decades in the inspection of power stations, pressure vessels, structures, engineering components, pipe systems, storage tanks and aerospace components. Our curriculum is formalized to provide custom training programs, best practices leading to gain thorough knowledge in practical Non-destructive testing.

NDT TRAINING INSTITUTE IN CHENNAI - PENETRANT TESTING

NDT COURSE - Introduction

PT can apply to detect surface discontinuities which are open to surface and also not extremely rough or porous.

This method applied to Metals, Glass, Ceramic, Rubber, and Plastic.

PT can detect only surface discontinuities i.e. Cracks, Porosity, Laps, and Pin holes in weld.

NDT TRAINING - Procedure

ASME Sec V Article 6

NDT - Standards

ASME Sec V Article 24 - SE165

NDT TRAINING - Reference Standards

NDT COURSE In CHENNA - Principle

Capillary action

NDT TRAINING Course in chennai- Types of action

After applying the Penetrant, it will enter into the opening or discontinuity of the job. This is called as capillary action.

The developer is having the blotting effect. So it brings out the Penetrant from the discontinuities. It is called as Blotting effect.

NDT TRAINING Center in chennai - PT Equipments

NDT TRAINING Academy in chennai - PT methods

NDT TRAINING School in Chennai- PT Process

NDT in Chennai - Surface Preparation / Pre Cleaning

Surface of the job should be free from Oil, Grease, Scale, welding flux, Spatter, Rust & Dust for getting the accurate results. This is called as surface Preparation or Pre cleaning.

Methods of Surface preparation

NDT Course in Tamil Nadu - Application of Penetrant

After the area has been cleaned, dried and the temp of surface & Penetrant are within the range 5° to 52°C , the Penetrant shall be applied by Spraying, Brushing, Dipping, Painting & Pouring on the cleaned surface.

NDT Training in Trichy -Dwell time

After applying the Penetrant minimum 5 minutes should be given to allow the Penetrant to go into the openings of the surface of the Job. (5 to 30 min)

NDT Training Center in Trichy - Remove of Excess Penetrant

After the specified dwell time has been elapsed. Any penetrant remaining on the surface shall be removed with a dry or slightly moistened cloth of solvent cleaner. Unidirectional only.

NDT Course in Trichy - Application of the developer

Apply developer directly to the area being inspected, by spraying from the aerosol container.

Areas being inspected shall be sprayed in such a manner so as to assure complete coverage with a thin, even film of developer.

Dipping or flooding parts with developer is prohibited.

NDt Course in tamil Nadu - Developing Time:

NDt in India - After applying the developer, time taken for blotting effect is known as Developing Time. (10 to 30 min)

NDT Course in India - Inspection

NT in Chennai After Appling the developer immediately visual inspection should be done.

Final interpretation is neither < 10 min nor > 60 min.

Visible Penetrant indications can be inspected in natural or artificial white light.

A minimum intensity at the inspection surface of 100 foot candles (1000 Lux) is required. For UV - 1000 uW/cm2

a. Evaluation of indications:

      a) Linear indications are those indications in which the length is more than three times the width.

      b) Rounded indication or indications which are circular or elliptical with lengths less than three times the width.

      c) Any questionable or doubtful indications shall be re-tested to verify whether or not actual defects are present.

Non Relevant indications

a) Localized surface imperfections may occur, such as machine marks, surface conditions, or incomplete bond between base metal and cladding, may produce similar indications which are not relevant.

b. Acceptance Criteria:

Acceptance criteria for specific Codes are listed as below.

These acceptance standards shall apply unless other more restrictive standards are specified if required by client. ANSI / ASME B31.1 &ANSI / ASME B31.3 Indication > 1/16"(1.5mm) shall be considered as relevant
  • Linear Indication: Any crack or linear indication > 1/16"(1.5mm)
  • Rounded Indications : Indications with dimensions >3/16"(5.0mm)
  • Four or more rounded indication in a line separated by 1/16"(1.5mm) or less edge3 to edge.
ASME SEC VIII D1 Indications > 1/16" (1.5 mm) shall be considered as relevant.The following indications shall be rejectable:
  • Relevant linear indication >1/16" (1.5mm)
  • Relevant rounded indications > 3/16" (5 mm)
  • Four or more rounded indications in a line separated by 1/16" or less (edge to edge).
AWS D1.1 Acceptance / Rejection criteria is dependent on service condition. Refer to the relevant project engineer or the Inspection Department. (Table 6.1 for visual inspection acceptance criteria can be applied)
ASME Sec IX Indications > 1/16"(1.5mm) shall be considered as relevant the following indications shall be rejectable:
  • Relevant linear indication >1/16" (1.5 mm)
  • Relevant rounded indications > 3/16" (5 mm)
  • Four or more rounded indications in a line separated by 1/16"(1.5mm) or less (edge to edge).
ASME Sec I Indications > 1/16"(1.5mm) shall be considered as relevant The following indications shall be rejectable:
  • Relevant linear indication >1/16"(1.5mm)
  • Relevant rounded indications > 3/16"(5.0mm)
  • Four or more rounded indications in a line separated by 1/16"(1.5mm) or less (edge to edge).

NDT TRAINING center in chennai - Post cleaning

After completion of the test, in cases where residual penetrant or developer could interfere with subsequent processing or with service requirements, a suitable technique, such as a water rinse or solvent soak for cleaning may be employed.

Properties of Penetrant:

NDT in Coimbatore - Advantages

NDT COURSE In TAMIL NADU - Disadvantages


NDT COURSE IN CHENNAI - Magnetic Particle Testing (MPT)

Introduction

MPT is a Non Destructive Testing (NDT) process for detecting surface and subsurface discontinuities in ferroelectric materials such as iron, nickel, cobalt, and some of their alloys.

* Surface & Sub Surface discontinuities can be find through this MPI

AC current = Only Surface
DC current = Up to 6mm from the surface

Procedure - ASME Sec V Article 7

Standards - ASME Sec V Article 25 – SE- 709 Reference:

NDT SCHOOL IN CHENNAI - BASIC PRINCIPLE:


Magnetic Flux Leakage

Magnetism Properties :

NDT TRAINING CENTRE IN CHENNAI - TYPES OF MAGNETIC MATERIALS:(According to the Magnetism)

NDT COURSE - Properties of Ferromagnetic Materials:

NDT CENTER - Types of medium / Method

Types of Wet Method

Procedure for Settling method

SETTLING TEST

FM - 0.1 to 0.4 ml VM - 1.2to 2.4 ml

Temperature Limit:

Basic Procedure

Basic steps involved

Pre-cleaning

Contaminants such as oil, grease, or scale may not only prevent particles from being attracted to leakage fields, they may also interfere with interpretation of indications.

Introduction of the Magnetic Field

The required magnetic field can be introduced into a component in a number of different ways.

Two general types of magnetic fields (longitudinal and circular) may be established within the specimen.

According to Methods of Magnetism

Circular Magnetism Method

Longitudinal Magnetism Method

Head Shot Method

NDT TRAINING - Central Conductor Method:

NDT SERVICES - PROD METHOD:

Two electrodes usually made of copper or aluminum that is used to introduce current in to a test part. This current in turn creates a circular magnetic field where each prod touches the part. (Similar in principal to a welding electrode and ground clamp).

Longitudinal Magnetism Method

YOKE METHOD

Yoke Calibrations
NDT COURSE CENTER IN BANGALORE - Coil method

A longitudinal magnetic field is usually established by placing the part near the inside or a coil’s annulus. This produces magnetic lines of force that are parallel to the long axis of the test part. The job may be cylindrical or square rod. If the job is more than 18 inch length test can be conducted by part by part.

Application of magnetic media

NDT INSTITUTE IN TRICHY - MPI can be performed using either dry particles, or particles suspended in a liquid. With the dry method, the particles are lightly dusted on to the surface. With the wet method, the part is flooded with a solution carrying the particles.

NDT TRAINING CENTER In COIMBATORE - Interpretation of magnetic particle indications

After applying the magnetic media, indications that form must interpreted. This process requires that the inspector distinguish between relevant and non-relevant indications.

Demagnetization

NDT IN chennai - Advantages of Magnetic Particle Inspection:

NDT institution in India - Limitations of Magnetic Particle Inspection:

NDt Training course in chennai - Limitations of Magnetic Particle Inspection:

NDT TRAINING INSTITUTE in chennai - ULTRASONIC TESTING (UT)

The sound range above 20 KHZ (or) 20,000HZ is called as an ULTRASONIC SOUND (or) ULTRASOUND.

SOUND CLASSIFICATION:

Subsonic < 16HZ

Sonic - 16HZ - 20KHZ

Ultrasonic > 20,000 HZ

NDT PROCEDURE:

ASME Sec V Article: 4 (Weld) &
Article: 5 (Raw Materials).

NDT TRAINING INSTITUTE - ULTRASONIC TRANSDUCERS:

It converts Electrical Energy into ultrasonic energy by utilizing a phenomenon known as the PIEZOELECTRIC EFFECT.

NDT CRYSTAL MATERIAL:

NDT CABLE:

NDT TRAINING INSTITUTE in INDIA - FUNDAMENTALS OF WAVE:

a) WAVE LENGTH: ( λ)
NDT Ultrasonic Testing The distance covered by one complete cycle.
λ = ν / f - v- Velocity f - Frequency

Shorter λ - Less penetration & Smaller flaws can be detected.

Larger λ - More penetration & larger flaws can be detected.

b)NDt FREQUENCY
No of cycles per sec
Unit: HZ or CPS.

c) NDt AMPLITUDE:
NDt Max displacement of the molecules from their equilibrium position.
d)NDT VELOCITY:
It is the rate at which the sound energy is transmitted in a medium

NDT PROPAGATION OF SOUND:

DEAD ZONE:

Ndt Seen on the CRT as an extension of the initial pulse the DZ is the ringing time of the crystal & it is minimized by the damping medium behind the crystal.

NDT NEAR ZONE:

NDT In this region, the sound intensity is variable owing to wave interference; therefore flaws lying in this zone may appear smaller or larger than their actual size.

N=D^2/4λ
D- Diameter of crystal
λ NDT Wavelength of sound
NDT FAR ZONE:

Beyond the near zone the far zone exists, in this region the beam divergence occurs, resulting in delay in the sound intensity as the distance from the crystal increased.

NDT TRAINING INSTITUTE - MODES OF PROPAGATION /TYPES OF WAVES:

NDT TRAINING INSTITUTE - LONGITUDINAL WAVES:

This type of wave is produced by normal or T/R Probe.
The direction of propagation of the produced sound is parallel to the particle of motion.
It propagates in solid, liquid & gases. Depth of penetration will be high.

NDT - SHEAR WAVES:

This type of wave is produced by Angle Probe only.
The direction of propagation is perpendicular to particle of motion.
Propagates only in solid.
Depth of penetration is 1/2 (half) of longitudinal waves.

NDT TRAINING INSTITUTE in trichy - TYPES OF PROBES:

a)NDT NORMAL PROBE:

b)NDT T/R PROBE:

c)NDT ANGLE PROBE:

NDT FACTORS AFFECTING THE PROPAGATION OF ULTRASOUND:

NDT General :

NDT INSTITUTE Dependent on the density & Elastic properties of that materials & types of waves transmitted.

Factors:

NDT CENTER Total Attenuation Loss:

NDt SCHOOL - Attenuation is defined as the loss in intensity of the ultrasonic beam.
2 main causes for attenuation are,
Scattering & Absorption.

Acoustic Impedance:

Z is the resistance of a material to passage of ultra sound.

Z= e*v e- Density / v- Velocity.

SNELL'S LAW:

Ó©1 - Angle of incident.
Ó©2 - Angle of refraction.
V1 - Angle of incident.
V2 - Angle of refraction

NDT TRAINING INSTITUTE - DECIBEL: (DB)

DB is a logarithmic base unit to compare sound intensities.

DB = 20 log 11 H1/H2.

H1 = 100%

COUPLANT:

Exclude any air that may be present b/w probe & test surface.
E.g.: water, oil, grease, polycell & glycerin.
Air - High acoustic impedance.

PROBE SELECTION:

EFFECT OF FREQUENCY:

SL NO LOW FREQUENCY HIGH FREQUENCY
1 Wave length Shorter wave length
2 More beam spread Less beam spread
3 Better penetrant Shorter penetrant
4 Shorter near zone Longer near zone
5 Less attenuation More attenuation
6 Less sensitivity Higher sensitivity
7 Longer dead zone Shorter dead zone

NDT TRAINING INSTITUTE IN CHENNAI - TYPES OF TESTING:

NDT ULTRASONIC FLOW DETECTORS:

UT equipment basically comprises of

NDT Depending on the display of information, pulse echo equipments divided into

NDT TRAINING INSTITUTE IN CHENNAI - CALIBRATION BLOCK

NDT TRAINING INSTITUTE IN TRICHY - Calibration block:

Reference block:

NDT Used to set the sensitivity level of the equipment for particular application.

NDT V1 Blocks or IIW (V1)

NDT IIW - INTERNATIONAL INSTITUTE OF WELDING

a)NDT Resolution Check:

NDT By this check we are able to conclude that the probe is capable of identifying two or more defects at the same location.

b)NDT Penetration Check:

NDT By penetration check we can conclude that the probe can able to identify the given range for any job.

c)NDT Sensitivity Check:

NDT It can conclude that the probe can able to identify even smallest defect.

NDT V2 Blocks or IIW (V2)

NDT Aiming towards 25mm radius:

NDT Signals occurs at 25mm , 100mm , 175mm , 250mm, 325mm, 400mm.

NDT Aiming towards 50mm radius:

NDT Signals occur at 50mm, 125mm, 200mm, 275mm, 350mm, 425mm.

NDT TRAINING INSTITUTE - REFERENCE TEST BLOCK

DAC - Distance Amplitude correction curve.
BLOCK THICK HOLE DIA TEST RANGE
19mm 2.4 Up to 25mm
38mm 3.2 25-50mm
75mm 4.8 50-102mm

UT FORMULAS

Probe selection:
Ó© = 90(degree) - T (Thickness of job)

Generally:

Beam path (W):

W or B.P = T/CosÓ©
Skip distance:

S.D = T * Tan Ó© (or) S.D = B.P * Sin Ó©

Beam path (W):

W or B.P = T/CosÓ©

Skip distance:

S.D = T * Tan Ó© (or) S.D = B.P * Sin Ó©

19mm Block:
Hole Dia - 2.4
Length - 200mm
Width - 80mm
Thickness - 19mm
Hole Depth:
1/4= 4.75
1/2= 9.50
3/4= 14.25
1= 19

ADVANTAGES:

DISADVANTAGES:

NDT TRAINING INSTITUTE IN CHENNAI - RADIOGRAPHY TESTING (RT)

NDT TRAINING COURSE IN TRICHY - INTRODUCTION:

NDT RT is based on exposure of the components to short wave length electromagnetic radiation in the form of x-rays or gamma rays from the suitable source.

NDT The amount of radiation absorbed by a particular part is a function of its thickness & density.

This radiation variation can be detected with the aid of photographic films.

PROCEDURE:

ASME SEC: V Article: 2 /Article: 22

PRINCIPLE:

Penetration & Differential Absorption.

NDT TRAINING IN CHENNAI - PROPERTIES OF ELECTRO MAGNETIC RADIATION:

TYPES OF RT:

X - rays are generated by electronic method.

Gamma - rays are produced by radioactive isotopes.

X-Ray:
The sudden deceleration of fast moving electron due to collision with target produces continuous X - ray spectrum.

NDT TRAINING INSTITUTE - BASIC CONSTRUCTION:

X-ray tube is essentially a glass vacuum tube. There are cathode & anode. Near the cathode there is a heated filament which is a source of electrons.

The anode is made of copper block to facilitate easy heat transfer. As a large amount of heat is generated at the tungsten target is fixed to the copper anode on which the electron strike. A high KV of the order of 50 to 400 KV is applied b/w the cathode & anode to accelerate the electrons. The generations of X-ray are emitted in all the direction.

Types of isotopes:

NDT TRAINING INSTITUTE - DISINTEGRATION LAW:

The unstable atom in the radio active nuclei emits alpha particle, beta & gamma rays to become a stable nucleus. This process is called disintegration law.

NDT TRAINING INSTITUTE - HALF LIFE PERIOD:

It is the time taken for half of the existing unstable nucleus to become stable size & shape of isotopes.
CURIE:
The disintegration per second.
1 curie = 3.7*10^10

NDT TRAINING INSTITUTE - GAMMA RADIOGRAPHY:

SOURCE:

SOURCE HALF LIFE PERIOD THICKNESS OF JOB TO BE RADIOGRAPHED
Iridium(Ir 192) 74.6 days Upto 75mm
Cobalt(co 60) 5.3 years 25 to 225mm
Cesium (ce 137) 22 years 40 to 100mm

NDT SERVICES IN CHENNAI - STEPS BEFORE RT:

Request:

RT should not be conducted until the client almost request.
Frequent RT cause global warming.

Barricade rope:

A barricade rope is a warning symbol & must be put around the testing area. This barricade rope must not be removed until the zone is free from radiation.

Survey meter:

It is used to find the amount of radiation in a particular location.

Dosi meter:

It is used to find the amount of radiation absorbed by human per day.

Film Badge:

It is used to calculate the amount of radiation absorbed by the individual per month.

Penetrometer:

It is a image quality indicator. It contains 6 wires. Penetrometer is placed anywhere in the welded area but not in the base metal. It is used to prove the quality.

Sensitivity= Wire Thickness * 100 / Material Thickness
Selection of film:
Lead number box:

A job batch number is imprinted on lead sheet & placed over the job while conducting RT to indicate the job number over the film.

Selection of Source:
RT Techniques: (methods)
NDT SERVICES IN CHENNAI - SWSI:

A single-wall exposure technique shall be used for radiography whenever practical. When it is not practical to use a single-wall radiographic testing technique, a double-wall technique shall be used. An adequate number of exposures shall be made to demonstrate that the required coverage has been obtained.

Single-Wall Technique. In the single-wall radiographic testing technique, the radiation passes through only one wall of the weld (material), which is viewed for acceptance on the radiograph.

In this method source is kept at the centre of the pipe & film covering the outer dia of the pipe on the welded area.

DWSI:

Whenever the panoramic method is not possible DWSI method is adopted. This method is done for above 3 pipes .Total pipe weld length is divided into 3 segments A, B & C.

3 Shots should be taken while placing the film AB, BC & CA. Penetrometer should be placed on FS only.

DWDI:

It is suitable for less than 3 inches. Two shots should be taken in this DWDI method (at 180 degree).

NDT SERVICES IN CHENNAI - RADIATION EFFECT:

1 REM=1RAD
REM - Roentgen equivalent mean.
RAD - Radiation absorbed dose.

SOMATIC EFFECT:

The individual is affected by radiation & is self harmed.

GENETIC EFFECT:

The radiation effect is passed over to the children of the affected individual.

NDT SERVICES IN CHENNAI - RADIATION DOSES & EFFECTS :

NDT RT ADVANTAGES

NDT RT DISADVANTAGES:

NDT SERVICES IN CHENNAI - ULTRASONIC THICKNESS GAUGING (UTG / UTM)

INTRODUCTION:

NDT An Ultrasonic Thickness Gauge is a "Transit Time Measuring Device".Used to find the thickness of a material.

FORMULA:

T = V * t / 2
Where,
V --> Velocity
t --> Transit time
Transit Time : Time measured for one to & fro distance.

TEMPERATURE LIMIT:

Below 93 degree Celsius (200 Fahrenheit)

TESTING RANGE:

1mm to 300 mm

AREA OF APPLICATION:

SOME TYPICAL APPLICATION:

Gauging/Measuring Techniques

Clean Surface:

NDT COURSE IN CHENNAI Before to gauging, always remove any dirt, loose scale, corrosion, Particles or other foreign substance from the material surface.

NDT TRAINING IN CHENNAI For Excessive Surface Roughness or Grooved Surface:

NDT TRAINING CENTER IN CHENNAI For very rough surface or grooved surface high viscosity couplant like grease is recommended.

Couplant :( For Smooth Surface)

NDT CENTER IN CHENNAI For smooth surface suitable couplant is machine oil or even water is sufficient.

Advantage:

DisAdvantage:

VISUAL TESTING (VT)

PROCEDURE

ASME Sec - V, Article 9 /
Acceptance Criteria: Sec. VIII Division 1 (Welds)

Introduction

NDT TRAINING IN CHENNAI Visual testing requires adequate illumination on the test surface and proper eye-sight of the tester. The most effective visual testing requires training.

NDT TRAINING CENTER IN CHENNAI Visual testing can be classified as direct visual testing, remote visual testing and translucent visual testing. Often the equipment needed is simple.

NDT IN CHENNAI A portable light, a mirror, a 2X or 4X hand lens, illuminated magnifier with magnification 5X or 10X. For internal inspection, light lens systems such as bore scopes allow remote surfaces to be examined.

NDT COURSE IN CHENNAI More sophisticated devices using fiber optics, it permits the introduction of the device into very small access holes and channels. Most of these systems provide for the attachment of a camera to permit permanent recording.

APPLICATION

PHYSICAL REQUIREMENTS

NDT INSTITUTE Personnel shall have an annual vision test to assure natural or corrected near distance acuity such that they are capable of reading standard J-1 letters on standard Jaeger test type charts for near vision. Equivalent near vision tests are acceptable.

NDT IN TAMIL NADU EQUIPMENT USED USED IN VISUAL INSPECTION

NDT IN INDIA Equipment used for visual examination shall include

TYPES OF TECHNIQUE / EXAMINATION

DIRECT VISUAL EXAMINATION

NDT COURSE IN TRICHY Direct visual examination may usually be made when access is sufficient to place the eye within 24 in. (600 mm) of the surface to be examined and at an angle not less than 30 deg to the surface to be examined. The minimum light intensity is 1000 lux (100 footcandles).

REMOTE VISUAL EXAMINATION

NDT COURSE IN BANGALORE Remote visual examination may have to be substituted for Direct visual examination. Remote visual examination may use Visual aids such as mirrors, telescopes, fiber optics, cameras, or other suitable instruments.

TRANSLUCENT VISUAL EXAMINATION

NDT TRAINING IN COIMBATORE Translucent visual examination is a supplement of direct visual examination. The method of Translucent visual examination uses the aid of artificial lighting., which can contained in an illuminator that produces directional lighting.

SURFACE CONDITION

NDT TRAINING CENTER IN COIMBATORE Surface prepared by gas cutting or arc cutting for welding shall be uniform and smooth and shall be free of all loose scale and slag accumulations.
NDT TRAINING CENTER IN TAMIL NADU The surface to be welded shall be clean and free of scale, rust, oil, grease, slag, detrimental oxides and other deleterious foreign materials.
The surface of the fillet weld shall merge smoothly with the surfaces joined.

METHOD OF EXAMINATION

ACCEPTANCE STANDARD OF BUTT WELDS

ACCEPTANCE STANDARD FOR FILLET WELDS

INSPECTION EVALUATION

NDT IN CHENNAI All examinations shall be evaluated in terms of the acceptance standards of the referencing Code Section.

INSPECTION DOCUMENTATION

ADVANTAGE OF VISUAL TESTING

LIMITATION FOR VISUAL TESTING

INTRODUCTION OF DESTRUCTIVE TESTING

CHENNAI NDT The process of testing a material quality by damaging the material is called as Destructive Testing.

TYPES OF DESTRUCTIVE TESTING:

QUANTITATIVE TESTING

Mechanical Testing
Bend Test
Fatigue test
Izod / Charpy

QUALITATIVE TESTING

Toughness
Hardness Test
Ductility
Strength
Fusion & Penetration

MECHANICAL TESTS

NDT CENTER CHENNAI Mechanical Properties (Tensile Test, Yield Test, Elongation)
Welder Qualification (Bend Test, Re-bend Test, Root bend, Face bend, Side bend Testing)
Fatigue Test
Impact Test

LABORATORY TESTS

NDT COURSE CHENNAI Chemical Analysis
Micro - Grain size
Macro corrosive Test
Plating Thickness
Micro Hardness
Weld depth Penetration
Inclusion Rating
Welder Qualification Testing

FAILURE ANALYSIS

COIMBATORE IN NDT Product Evaluation
Process Evaluation
Mechanical Damage
Root Cause determination
Determination of Origin of failure
Material Anomalies

INTRODUCTION TO NONDESTRUCTIVE TESTING

Definition of NDT

TRICHY IN NDT The Process of testing a material for detecting surface and internal defects without destroying the material. I.e. inspect or Examine without doing harm.

Methods of NDT

Uses of NDT Methods

Common Application of NDT

Inspection of Raw Products

Inspection Following Secondary Processing

In-Services Damage Inspection

QC CONTENTS:

PLACEMENT CATEGORIES:

SECTORS

LIQUID PENETRANT TESTING

NDT TRAINING CENTER IN CHENNAI Liquid penetrant testing (PT) is only used for detecting discontinuities open to the surface. With the correct application, it will detect discontinuities ranging in size from the large to the microscopic. The specially prepared liquids, characterized by low a viscosity, easily enter voids open to the surface when the part is dipped into or sprayed by the penetrant. Relatively simple, inexpensive and reliable.

MAGNETIC PARTICLE TESTING

NDT INSTITUTE Magnetic particle testing (MT) is used to detect discontinuities in ferromagnetic parts – namely parts made of iron, steel, nickel, cobalt and the alloys of these materials. Ferromagnetic materials develop strong internal magnetic fields when an electric current is passed through the part. Magnetic particles are applied to the part and a discontinuity that causes a disruption in the induced magnetic field attracts the applied particles, producing an indication.
MT is a highly effective inspection tool that is sensitive to the presence of cracks, laps, seams and similar types of surface and near-surface discontinuities.

ULTRASONIC TESTING

NDT TRAINING IN CHENNAI Ultrasonic testing (UT) is used in the testing of nearly all solid materials, such as fine-grained aluminum, steels and alloys, composites and plastics – practically any solid material where detection of internal discontinuities or thickness measurements are of most common concern.

It is also used in the detection of interlaminar separations and regions that have been improperly processed or damaged in layered composite structures.

It is used in the detection and sizing of internal reflectors of ultrasonic pulses and thus is found in the testing of welds, forgings and raw materials in the form of plate, rod, pipe and similar simple geometrical shapes.

RADIOGRAPHIC TESTING

NDT COURSE IN CHENNAI Inspection techniques using radiographic testing (RT) are some of the most common approaches to visualizing the internal structures of components, materials and assemblies. The approach requires a source of electromagnetic radiation that can penetrate the item being examined during exposure (the time the item is illuminated by the radiation).

Applications for RT are found throughout manufacturing and field-service environments. Raw materials are examined for the presence of internal discontinuities (castings, forgings); fabrications and assemblies are examined for induced discontinuities (welds) and misalignments or absence of internal parts; and inservice inspections use RT for detecting and assessing time-dependant degradation, such as corrosion, cracking and environmental damage.

VISUAL TESTING

NDT COURSE Visual testing is the most commonly used test method in industry. Because most test methods require that the operator look at the surface of the part being inspected, visual inspection is inherent in most of the other test methods. As the name implies, VT involves the visual observation of the surface of a test object to evaluate the presence of surface discontinuities. VT inspections may be by Direct Viewing, using line-of sight vision, or may be enhanced with the use of optical instruments such as magnifying glasses, mirrors, boroscopes, and computer-assisted viewing systems (Remote Viewing). Corrosion, misalignment of parts, physical damage and cracks are just some of the discontinuities that may be detected by visual examinations.

EDDY CURRENT TESTING

NDT IN TAMIL NADU Eddy current testing is particularly well suited for detecting surface cracks but can also be used to make electrical conductivity and coating thickness measurements.

Periodically, power plants are shutdown for inspection. Inspectors feed eddy current probes into heat exchanger tubes to check for corrosion damage.
NDT COURSE IN INDIA Alternating electrical current is passed through a coil producing a magnetic field. When the coil is placed near a conductive material, the changing magnetic field induces current flow in the material. These currents travel in closed loops and are called eddy currents. Eddy currents produce their own magnetic field that can be measured and used to find flaws and characterize conductivity, permeability, and dimensional features.

Acoustic Emission Testing (AE)

NDT IN MUMBAI Acoustic Emission Testing is performed by applying a localized external force such as an abrupt mechanical load or rapid temperature or pressure change to the part being tested. The resulting stress waves in turn generate short-lived, high frequency elastic waves in the form of small material displacements, or plastic deformation, on the part surface that are detected by sensors that have been attached to the part surface. When multiple sensors are used, the resulting data can be evaluated to locate discontinuities in the part.

Leak Testing (LT)

NDT IN DELHI NOIDA Leak Testing, as the name implies, is used to detect through leaks using one of the four major LT techniques: Bubble, Pressure Change, Halogen Diode and Mass Spectrometer Testing. These techniques are described below.

Bubble Leak Testing, as the name implies, relies on the visual detection of a gas (usually air) leaking from a pressurized system. Small parts can be pressurized and immersed in a tank of liquid and larger vessels can be pressurized and inspected by spraying a soap solution that creates fine bubbles to the area being tested. For flat surfaces, the soap solution can be applied to the surface and a vacuum box can be used to create a negative pressure from the inspection side. If there are through leaks, bubbles will form, showing the location of the leak.

Pressure Change Testing NDT IN TAMIL NADU can be performed on closed systems only. Detection of a leak is done by either pressurizing the system or pulling a vacuum then monitoring the pressure. Loss of pressure or vacuum over a set period of time indicates that there is a leak in the system. Changes in temperature within the system can cause changes in pressure, so readings may have to be adjusted accordingly.

Halogen Diode TestingNDT COURSE IN CHENNAI is done by pressurizing a system with a mixture of air and a halogen-based tracer gas. After a set period of time, a halogen diode detection unit, or "sniffer", is used to locate leaks.

Mass Spectrometer Testing NDT COURSE CENTER IN CHENNAI can be done by pressurizing the test part with helium or a helium/air mixture within a test chamber then surveying the surfaces using a sniffer, which sends an air sample back to the spectrometer. Another technique creates a vacuum within the test chamber so that the gas within the pressurized system is drawn into the chamber through any leaks. The mass spectrometer is then used to sample the vacuum chamber and any helium present will be ionized, making very small amounts of helium readily detectable.

Neutron Radiographic Testing (NR)

NDT TRAINING CENTER IN CHENNAI Neutron radiography uses an intense beam of low energy neutrons as a penetrating medium rather than the gamma- or x-radiation used in conventional radiography. Generated by linear accelerators, betatrons and other sources, neutrons penetrate most metallic materials, rendering them transparent, but are attenuated by most organic materials (including water, due to its high hydrogen content) which allows those materials to be seen within the component being inspected. When used with conventional radiography, both the structural and internal components of a test piece can be viewed.

Thermal/Infrared Testing (IR)

Thermal/Infrared Testing, or infrared thermography, is used to measure or map surface temperatures based on the infrared radiation given off by an object as heat flows through, to or from that object. The majority of infrared radiation is longer in wavelength than visible light but can be detected using thermal imaging devices, commonly called "infrared cameras." For accurate IR testing, the part(s) being investigated should be in direct line of sight with the camera, i.e., should not be done with panel covers closed as the covers will diffuse the heat and can result in false readings. Used properly, thermal imaging can be used to detect corrosion damage, delaminations, disbonds, voids, inclusions as well as many other detrimental conditions.

Vibration Analysis (VA)

NDT TRAINING IN CHENNAI Vibration analysis refers to the process of monitoring the vibration signatures specific to a piece of rotating machinery and analyzing that information to determine the condition of that equipment. Three types of sensors are commonly used: displacement sensors, velocity sensors and accelerometers.
AEROSPACE NDT NAS 410 COURSE IN CHENNAI Displacement sensors uses eddy current to detect vertical and/or horizontal motion (depending on whether one or two sensors are used) and are well suited to detect shaft motion and changes in clearance tolerances.
Basic velocity sensors use a spring-mounted magnet that moves through a coil of wire, with the outer case of the sensor attached to the part being inspected. The coil of wire moves through the magnetic field, generating an electrical signal that is sent back to a receiver and recorded for analysis. Newer model vibration sensors use time-of-flight technology and improved analysis software. Velocity sensors are commonly used in handheld sensors.
AEROSPACE NDT TRAINING IN CHENNAI Basic accelerometers use a piezoelectric crystal (that converts sound waves to electrical impulses and back) attached to a mass that vibrates due to the motion of the part to which the sensor casing is attached. As the mass and crystal vibrate, a low voltage current is generated which is passed through a pre-amplifier and sent to the recording device. Accelerometers are very effective for detecting the high frequencies created by high speed turbine blades, gears and ball and roller bearings that travel at much greater speeds than the shafts to which they are attached.

NDT COURSE CENTER IN CHENNAI We are providing Level I, II Training and Certification as per Recommended Practice PCN LEVEL II & ASNT - TC-1A -2006 in the following NDT Methods.

PCN NDT - Central Govt.Approved NABL LAB FOR NDT - The NDT Approach

NDT TRAINING CENTER IN CHENNAI PCN NDT COURSE IN INDIA, CSWIP TRAINING IN INDIA, The NDT INSTITUTE & INSPECTION TECHNOLOGY LTD., (NIITL) is a NDT Course Training specialises in programmed NDT courses at level I and II encompassing both practical and theoretical techniques in the NDT disciplines as listed under the NDT Course METHODS tab on this site.

NDT INSTITUTE IN CHENNAI | NDT TRAINING COURSE IN CHENNAI | NDT TRAINING INSTITUTE IN CHENNAI | NDT TRAINING INSTITUTE IN TAMIL NADU | NDT TRAINING CENTER IN CHENNAI | NDT TRAINING CENTRE IN CHENNAI | NDT LEVEL I II COURSE IN CHENNAI | NDT IN CHENNAI | NDT COURSE CHENNAI PCN TRAINING IN INDIA, NDT COURSE IN CHENNAI ,PCN INSTITUTE IN CHENNAI,PCN IN INDIA, CSWIP WELDING INSPECTOR COURSE , ASNT NDT COURSES, PCN NDT INSTITUTE IN INDIA,CSWIP WELDING INSTITUTE,PCN LEVEL II, CSWIP LEVEL II, ASNT LEVEL II TRAINING & CERTIFICATION INSTITUTE IN CHENNAI,INDIA..PCN COURSE IN CHENNAI , PCN COURSE IN INDIA, CSWIP INSTITUTE IN INDIA, Non-destructive testing, commonly abbreviated NDT course is simply defined as the testing of materials for surface or internal flaws without causing any destruction or harm to the material under test.

NDT INSTITUTE IN CHENNAI - PCN INSTITUTE IN INDIA ,Non-destructive testing is a career field that is relatively obscure in the minds of the general public.

NDT COURSE TRAINING CENTER IN CHENNAI

PCN NDT INSTITUTE IN INDIA,The name seems totally self-explanatory, but most NDT professionals can definitely relate to the experience of trying to explain what non-destructive testing means to family members, friends and acquaintances.

NDT TRAINING COURSE IN CHENNAI PCN COURSE IN INDIA,Most students when considering career options are completely unaware that NDT is a very exciting and rewarding career field. `Career’ being the important word.

NDT TRAINING CENTER IN CHENNAI CSWIP COURSE IN INDIA, Every bit of knowledge acquired during training, experience and certification has to be productively put to use and most importantly the learning process never ends.

NDT COURSE IN CHENNAI CSWIP WELDING INSPECTOR COURSE IN INDIA, The NDT Course process relies on the careful approach of the technician, his dedication, thoroughness, perseverance and the usage of sound work procedures referencing codes and specifications.

NDT SERVICES IN CHENNAI CSWIP WELDING COURSE IN TAMIL NADU, INDIA, As a fundamental part of the engineering, manufacturing and in-service process, NDT Course in chennai utilises the human senses of sight, touch and hearing, amplified by a broad selection of equipment and apparatus to interpret and evaluate materials. NDT course is the most widely used chemical and physical inspection method to investigate the composition of materials by means of sound waves, electrical currents, X- and Gamma rays, magnetic fields, thermal waves and tracer liquids directed into and in most cases , penetrating the materials under test.

NDT course IN CHENNAI is particularly effective at locating performance degrading conditions such as cracking, voids, inclusions, unbonded surfaces, incorrect assembly, incorrect dimension, wall thinning, porosity, incorrect coating thickness, poorly welded fabrications, defects in castings, forgings, rolled products and defects in a host of unlimited manufacturing processes.

Essentially, Non-destructive testing assists in the detection and characterisation of material deficiencies without inhibiting the parts usefulness in any way.

Founding Statement NDT COURSES IN CHENNAI ,TAMIL NADU , INDIA

‘NIITL a company with a strong NDT present and a strong NDT future.

NDT TRAINING IN CHENNAI The NDT INSTITUTE was founded in January of 2004. As we at NIITL proceed in all our efforts, with unequivocal excellence, I aim to change that opening statement, in time to include, ‘A strong NDT Past’.

NDT TRAINING CENTER IN CHENNAI Our philosophy is to continually provide thorough and attentive service to our clients bringing the utmost level of integrity to our training efforts and to strive to maintain our knowledgeable position in the ever-changing NDT world. NIITL shall remain productive and always be a contender, employing good work ethics as a foundation for success.

NDT COURSE IN CHENNAI As the founder of the Academy I shall endeavour to instill the highest quality in all aspects of the company. As an independent NDT training facility NIITL possess the flexibility to tailor programs to meet the client’s needs. We shall be of assistance to you, and shall be continually asking ourselves, how can we advantageously improve?

NDT IN TAMIL NADU Supporting the NIITL NDT Course training facility, a NDT Certification Committee has been established employing the experience, skills and knowledge of NDT Level III’s and appropriately experienced members of the NDT community in Chennai, India . NIITL - exists as an independent body and has no involvement in the training of students.

GOVERNMENT NDT CENTER IN CHENNAI - With the establishment of the NIITL in compliance with SNT-TC-1A the prime objective in the very near future is to invite and incorporate all other NDT course training facilities and Qualifying bodies in India - NABL . to work together to establish technical harmonisation of NDT course certification. This would inspire greater confidence in the resulting certification which will facilitate mutual recognition and worldwide acceptance of the national NDT Course certificates issued in India.

CENTRAL GOVT APPROVED NDT INSTITUTE IN CHENNAI At NIITL and the MTL we believe in having total transparency in our NDT training Course and certification program, and openly welcome any form of official Audit by any, and all interested parties of the NDT Institute related community at any time. With pride and dynamism we aspire to become the pre-eminent NDT training facility in Chennai. When we become aware of what is possible we begin to realise that success can be achieved, that challenges can be conquered and that problems can be solved. In doing so we open up a completely new set of avenues and possibilities, for ourselves and you.

NDT TRAINING IN MUMBAI Albert Einstein said, ‘Imagination is more powerful than knowledge.’ I believe that this is true in many respects because while knowledge allows you to see things as they are, imagination allows you to see things as they could be.

NDT IN BANGALORE Having said that I shall leave you with the official motto of our country… India, alive with possibility.

NDT COURSE IN CHENNAI (NDT DETAILS)

LIQUID PENETRANT TESTING

NDT COURSE IN TAMIL NADU , INDIA One of the most common ways to enhance NDT COURSE visual testing (VT) is through the introduction of highly visible penetrating liquids. These specially prepared liquids, characterized by low a viscosity, easily enter voids open to the surface when the part is dipped into or sprayed by the penetrant.

Relatively simple, inexpensive and reliable, NDT Course liquid penetrant testing (PT) is only used for detecting discontinuities open to the surface. With the correct application, it will detect discontinuities ranging in size from the large to the microscopic.

ADVANTAGES

Liquid penetrant testing:

• NDT Course in chennai is one of the more sensitive nondestructive testing methods for detecting very small surface discontinuities.

• NDT Course in chennai can be used on a wide variety of materials, including ferrous and nonferrous metals, alloys, powdered metal products, glass and some types of organic materials.

• NDT Course in chennai can be performed with relatively inexpensive, unsophisticated equipment. If the area to be tested is small, the test can be conducted with portable equipment.

• NDT Course in chennai is capable of examining all of the exterior surfaces of objects, even of complex shapes, in one operation. Other NDT - nondestructive testing methods require the probing media to be directed to a specific surface or area, whereas liquid penetrant Testing can coat the entire part. Parts that are too large for immersion can be processed by spraying the liquid penetrant materials to provide complete surface coverage.

• NDT Course in chennai is readily adapted to volume processing, permitting 100% testing. Small parts may be placed in baskets for batch processing. Specialized systems may be automated to process as many parts per hour as required.

• NDt Course in chennai magnifies the apparent size of discontinuities, making the indications more visible. In addition, the discontinuity location, orientation and approximate length are indicated on the part, making interpretation and evaluation possible.

• NDT Course in Chennai may be adjusted to provide various sensitivity levels through the proper choice of materials and processing procedures or techniques.

DISADVANTAGES AND LIMITATIONS

The PT method has several disadvantages and limitations. Inspectors using PT should note that:

• NDT Training Institute in chennai|NDT TRAINING|NDT INSTITUTE In CHENNAI| NDT COURSE IN CHENNAI | NDT CENTER IN CHENNAI | NDT TRAINING CENTER IN CHENNAI |NDT TRAINING INSTITUTE IN CHENNAI | NDT COURSE IN CHENNAI| discontinuities must be open to the surface, as well as free of foreign material that could restrict the entry of the penetrant into the discontinuity.

• NDT Training Institute in chennai - liquid penetrants, emulsifiers (liquids that combine with oil-based penetrants to make them water-washable) and some types of developers may cause skin irritation.

• NDT Training Institute in chennai - liquid penetrants may harm some nonmetallic materials, such as rubber and plastic. There is also the possibility of permanent staining of porous or coated materials.

• NDT Training Institute in chennai - some liquid penetrant materials contain volatile solvents that can produce nausea; thus, adequate ventilation is necessary to remove noticeable vapors, especially in confined areas.

• NDt Training Institute in chennai - liquid penetrants, especially in aerosol form, are flammable. Inspectors must follow manufacture’s recommendations regarding necessary personnel protective equipment when using such equipment.

NDT TRAINING CENTER IN CHENNAI

MAGNETIC PARTICLE TESTING

NDT Training Center in chennai - Magnetic particle testing (MT) is used to detect discontinuities in ferromagnetic parts – namely parts made of iron, steel, nickel, cobalt and the alloys of these materials. Ferromagnetic materials develop strong internal magnetic fields when an electric current is passed through the part. Magnetic particles are applied to the part and a discontinuity that causes a disruption in the induced magnetic field attracts the applied particles, producing an indication.

NDT Training Center in chennai - MT is a highly effective inspection tool that is sensitive to the presence of cracks, laps, seams and similar types of surface and near-surface discontinuities.

NDT Training Center in chennai - Non-relevant indications can sometimes be found near sharp transitions in test part geometry and at metallurgical anomalies introduced during welding due to localized thermal shock, usually associated with the heat-affected zone near welds. Depending on the type of discontinuity and the direction expected, test parts should be examined in two orthogonal (perpendicular) directions because discontinuities must have a major dimension perpendicular to the magnetic field lines of force in order to be detected.

ADVANTAGES

Magnetic particle testing offers the following advantages:

• NDT - low-cost, reliable method for locating surface cracks in ferromagnetic materials.

• NDT - few limitations on size and shape of part.

• NDT - particle size and sensitivity can be adjusted.

• NDT - particles may be in colour or made to fluoresce under ultraviolet radiation.

• NDT - portable if required for field use.

• NDT - can use permanent magnets if no electrical power is available.

• NDT - can use 12 V power sources (car batteries).

• NDT - fairly fast and simple application process.

• NDT - visual interpretation of indications.

• NDT - can detect subsurface discontinuities in some conditions.

DISADVANTAGES

Disadvantages of magnetic particle testing include the following:

• NDT - can be used only on ferromagnetic materials.

• NDT - large electrical currents are required for certain test applications.

• NDT - magnetic field must be properly orientated.

• NDT - correct selection and process of application of particles can severely limit sensitivity.

• NDT - too much current is often used, masking discontinuities with spurious indications.

• NDT - false indications often occur in transition areas.

• NDT - burning of parts can occur at contact points, damaging heat treatment and, in severe cases, destroying the part.

• NDT - skin burn may occur from suspension oils.

• NDT - some fire risks occur when using open tanks and oil-suspended particles.

NDT TrAINING INSTITUTE IN CHENNAI

ULTRASONIC TESTING

Ultrasonic testing (UT) is used in the testing of nearly all solid materials, such as fine-grained aluminum, steels and alloys, composites and plastics – practically any solid material where detection of internal discontinuities or thickness measurements are of most common concern.

It is also used in the detection of inter laminar separations and regions that have been improperly processed or damaged in layered composite structures.

This technique is less effective with highly in homogeneous and coarse- grained materials (such as concrete and stainless steel castings) and non-elastic materials (such as rubber and soft plastics) that tend to absorb or scatter ultrasonic energy at relatively short distances.

This form of testing has become a commonly accepted approach to wall thickness measurement when access is limited to one side of the material. It is used in the detection and sizing of internal reflectors of ultrasonic pulses and thus is found in the testing of welds, forgings and raw materials in the form of plate, rod, pipe and similar simple geometrical shapes.

ADVANTAGES

Advantages of ultrasonic testing include:

• NDT - high sensitivity to the discontinuities that are most critical to structural integrity. For example, lack of fusion and incomplete penetration in welds are commonly detected. Also, cracks in both welds and bulk material are often very easy to detect.

• NDT - highly portable equipment, which is well suited to field inspection and inspection of in-service structures.

• NDT -application to a broad range of materials.

• NDT -in many cases, the ability to inspect very thick material, as well as the ability to detect discontinuities as small as 0.4 mm (0.016 in.) in diameter.

• NDT -in general access to only one surface is required.

• NDT -results are generated instantly with little or no processing time.

DISADVANTAGES

• Ultrasonic testing has several disadvantages and limitations. It should be noted that:

• inspection of complex shapes is very difficult.

• interpretations of UT indications require a high degree of operator training, experience and skill.

• there is a lack of definitive sizing capability, especially for diffuse discontinuities such as porosity or stress-corrosion cracking.

• discontinuities must be favorably orientated with respect to an accessible scan surface.

• a couplant, typically a liquid, must be placed on the scan surface in order for the sound to enter the part.

• typically no permanent record, comparable to a radiograph, is produced.

NDT COURSE IN CHENNAI

RADIOGRAPHIC TESTING

Inspection techniques using radiographic testing (RT) are some of the most common approaches to visualizing the internal structures of components, materials and assemblies. The approach requires a source of electromagnetic radiation that can penetrate the item being examined during exposure (the time the item is illuminated by the radiation).

Applications for RT are found throughout manufacturing and field-service environments. Raw materials are examined for the presence of internal discontinuities (castings, forgings); fabrications and assemblies are examined for induced discontinuities (welds) and misalignments or absence of internal parts; and inservice inspections use RT for detecting and assessing time-dependant degradation, such as corrosion, cracking and environmental damage.

ADVANTAGES

Radiographic testing provides the following advantages:

• NDT - can easily locate internal structural discontinuities using visual comparison with known geometric features of the test object.

• NDT - is applicable to most classes of materials.

• NDT - is considered by many to be the most universal approach to volumetric examination.

• NDT - yields a visual rendition of internal voids and fabrication errors that is readily interpretable.

• NDT -provides a permanent record of the inspection, including evidence of the sensitivity of the test when the image quality indicators (IQIs) are used.

• NDT - is capable of detecting local changes in thickness and density on the order of 1%, as measured along the line of sight of the X-ray beam.

• NDT - can provide a digital record of the test object for subsequent display on a computer monitor. DISADVANTAGES

Some disadvantages and limitations of radiographic testing include the following:

• NDT - it is a relatively expensive method of nondestructive testing.

• NDT - it is impractical to use on specimens of complex geometry.

• NDT - isolated local discontinuities, with in-line dimensions much less than 2% of the total thickness, are usually not detected.

• NDT - the specimen must lend itself to two-sided accessibility.

• NDT - laminar type discontinuities are often undetected by radiography because they are aligned transverse to the path of radiation.

• NDT - it requires highly trained and skilled personnel.

• NDT - operating licenses issued by state and federal agencies are required.

NDT TRAINING SCHOOL IN CHENNAI

EDDY CURRENT TECHNIQUE

NDT COURSE IN CHENNAI One of the more widely practiced ET techniques is eddy current testing. The flow of eddy currents is affected by fissures, constrictions or other discontinuities that cause distortions in the cross section through which the current is made to flow. Thus, the eddy current technique is useful for detecting the wall thickness of thin materials as well as measuring localized discontinuities. The thickness of the part must be within the depth of penetration (referred to as the skin depth) of the eddy currents and is dependent upon material properties and operating frequency. It is usually less than 0.635 cm (0.25 in.) and may be very much less, particularly for ferromagnetic materials.

ADVANTAGES

• NDT - Advantages of eddy current testing include the following:

• NDT - provides instantaneous results.

• NDT - uses portable equipment that may be readily adapted to automation.

• NDT - causes no damage to the material.

• NDT - presents no health hazards to the technician.

• NDT - is intrinsically safe as a testing tool, requiring only the coupling of an alternating magnetic field with the component under test to provide the interrogatory medium.

DISADVANTAGES

• NDT - Eddy current testing is affected by the following limitations:

• NDT - testing is limited to those metals and carbon fiber composites that are conductors of electrical currents.

• NDT - when the test part is composed of a ferromagnetic material, the depth of penetration into the material is vastly reduced.

• NDT - although discontinuities perpendicular to the surface being scanned are readily detected, discontinuities parallel to the surface, such as laminations, are generally not detected.

• NDT - in ferromagnetic materials, conditions such as work hardening and heat treating tend to introduce large variations in detected signals and may obscure the responses of most interest.

• NDT - Through the use of magnetic saturation techniques, however, many of these kinds of limitations can be removed.

NDT INSTITUTE AND INSPECTION TECHNOLOGY LIMITED.,

VISUAL TESTING

Throughout manufacturing and field inspection, visual testing (VT) is the most widely used NDT method.

The presence of a multitude of potential problem areas can be identified by knowledgeable observers, assisted by devices that magnify, qualify or quantify the conditions being evaluated.

------------------------------------------

NDT INSTITUTE IN CHENNAI - LIQUID PENETRANT TESTING

Liquid penetrant testing (PT) is only used for detecting discontinuities open to the surface. With the correct application, it will detect discontinuities ranging in size from the large to the microscopic. The specially prepared liquids, characterized by low a viscosity, easily enter voids open to the surface when the part is dipped into or sprayed by the penetrant. Relatively simple, inexpensive and reliable.

NDT COURSE IN CHENNAI - MAGNETIC PARTICLE TESTING

Magnetic particle testing (MT) is used to detect discontinuities in ferromagnetic parts – namely parts made of iron, steel, nickel, cobalt and the alloys of these materials. Ferromagnetic materials develop strong internal magnetic fields when an electric current is passed through the part. Magnetic particles are applied to the part and a discontinuity that causes a disruption in the induced magnetic field attracts the applied particles, producing an indication. MT is a highly effective inspection tool that is sensitive to the presence of cracks, laps, seams and similar types of surface and near-surface discontinuities.

NDT TRAINING IN CHENNAI -ULTRASONIC TESTING

Ultrasonic testing (UT) is used in the testing of nearly all solid materials, such as fine-grained aluminum, steels and alloys, composites and plastics – practically any solid material where detection of internal discontinuities or thickness measurements are of most common concern.

It is also used in the detection of interlaminar separations and regions that have been improperly processed or damaged in layered composite structures.

It is used in the detection and sizing of internal reflectors of ultrasonic pulses and thus is found in the testing of welds, forgings and raw materials in the form of plate, rod, pipe and similar simple geometrical shapes.

NDT IN CHENNAI - RADIOGRAPHIC TESTING

Inspection techniques using radiographic testing (RT) are some of the most common approaches to visualizing the internal structures of components, materials and assemblies. The approach requires a source of electromagnetic radiation that can penetrate the item being examined during exposure (the time the item is illuminated by the radiation). Applications for RT are found throughout manufacturing and field-service environments. Raw materials are examined for the presence of internal discontinuities (castings, forgings); fabrications and assemblies are examined for induced discontinuities (welds) and misalignments or absence of internal parts; and inservice inspections use RT for detecting and assessing time-dependant degradation, such as corrosion, cracking and environmental damage.

NDT INSTITUTE IN TRICHY - VISUAL TESTING

Visual testing is the most commonly used test method in industry. Because most test methods require that the operator look at the surface of the part being inspected, visual inspection is inherent in most of the other test methods. As the name implies, VT involves the visual observation of the surface of a test object to evaluate the presence of surface discontinuities. VT inspections may be by Direct Viewing, using line-of sight vision, or may be enhanced with the use of optical instruments such as magnifying glasses, mirrors, boroscopes, and computer-assisted viewing systems (Remote Viewing). Corrosion, misalignment of parts, physical damage and cracks are just some of the discontinuities that may be detected by visual examinations.

NDT TRAINING CENTER IN COIMBATORE - EDDY CURRENT TESTING

Eddy current testing is particularly well suited for detecting surface cracks but can also be used to make electrical conductivity and coating thickness measurements.

Periodically, power plants are shutdown for inspection. Inspectors feed eddy current probes into heat exchanger tubes to check for corrosion damage.

Alternating electrical current is passed through a coil producing a magnetic field. When the coil is placed near a conductive material, the changing magnetic field induces current flow in the material. These currents travel in closed loops and are called eddy currents. Eddy currents produce their own magnetic field that can be measured and used to find flaws and characterize conductivity, permeability, and dimensional features.

NDT TRAINING IN COIMBATORE - Acoustic Emission Testing (AE)

Acoustic Emission Testing is performed by applying a localized external force such as an abrupt mechanical load or rapid temperature or pressure change to the part being tested. The resulting stress waves in turn generate short-lived, high frequency elastic waves in the form of small material displacements, or plastic deformation, on the part surface that are detected by sensors that have been attached to the part surface. When multiple sensors are used, the resulting data can be evaluated to locate discontinuities in the part.

NDT LEVEL I II COURSE IN CHENNAI - Leak Testing (LT)

Leak Testing, as the name implies, is used to detect through leaks using one of the four major LT techniques: Bubble, Pressure Change, Halogen Diode and Mass Spectrometer Testing. These techniques are described below.

NDT TRAINING INSTITUTE IN CHENNAI - LT Techniques

Bubble Leak Testing, as the name implies, relies on the visual detection of a gas (usually air) leaking from a pressurized system. Small parts can be pressurized and immersed in a tank of liquid and larger vessels can be pressurized and inspected by spraying a soap solution that creates fine bubbles to the area being tested. For flat surfaces, the soap solution can be applied to the surface and a vacuum box can be used to create a negative pressure from the inspection side. If there are through leaks, bubbles will form, showing the location of the leak.

Pressure Change Testing can be performed on closed systems only. Detection of a leak is done by either pressurizing the system or pulling a vacuum then monitoring the pressure. Loss of pressure or vacuum over a set period of time indicates that there is a leak in the system. Changes in temperature within the system can cause changes in pressure, so readings may have to be adjusted accordingly.

Halogen Diode Testing is done by pressurizing a system with a mixture of air and a halogen-based tracer gas. After a set period of time, a halogen diode detection unit, or "sniffer", is used to locate leaks.

Mass Spectrometer Testing can be done by pressurizing the test part with helium or a helium/air mixture within a test chamber then surveying the surfaces using a sniffer, which sends an air sample back to the spectrometer. Another technique creates a vacuum within the test chamber so that the gas within the pressurized system is drawn into the chamber through any leaks. The mass spectrometer is then used to sample the vacuum chamber and any helium present will be ionized, making very small amounts of helium readily detectable.

NDT TRAINING CENTER IN CHENNAI - Neutron Radiographic Testing (NR)

Neutron radiography uses an intense beam of low energy neutrons as a penetrating medium rather than the gamma- or x-radiation used in conventional radiography. Generated by linear accelerators, betatrons and other sources, neutrons penetrate most metallic materials, rendering them transparent, but are attenuated by most organic materials (including water, due to its high hydrogen content) which allows those materials to be seen within the component being inspected. When used with conventional radiography, both the structural and internal components of a test piece can be viewed.

NDT COURSE TRAINING IN CHENNAI - Thermal/Infrared Testing (IR)

Thermal/Infrared Testing, or infrared thermography, is used to measure or map surface temperatures based on the infrared radiation given off by an object as heat flows through, to or from that object. The majority of infrared radiation is longer in wavelength than visible light but can be detected using thermal imaging devices, commonly called "infrared cameras." For accurate IR testing, the part(s) being investigated should be in direct line of sight with the camera, i.e., should not be done with panel covers closed as the covers will diffuse the heat and can result in false readings. Used properly, thermal imaging can be used to detect corrosion damage, delaminations, disbonds, voids, inclusions as well as many other detrimental conditions.

NDT TRAINING INSTITUTE IN TAMIL NADU - Vibration Analysis (VA)

Vibration analysis refers to the process of monitoring the vibration signatures specific to a piece of rotating machinery and analyzing that information to determine the condition of that equipment. Three types of sensors are commonly used: displacement sensors, velocity sensors and accelerometers.

Displacement sensors uses eddy current to detect vertical and/or horizontal motion (depending on whether one or two sensors are used) and are well suited to detect shaft motion and changes in clearance tolerances.

Basic velocity sensors use a spring-mounted magnet that moves through a coil of wire, with the outer case of the sensor attached to the part being inspected. The coil of wire moves through the magnetic field, generating an electrical signal that is sent back to a receiver and recorded for analysis. Newer model vibration sensors use time-of-flight technology and improved analysis software. Velocity sensors are commonly used in handheld sensors.

Basic accelerometers use a piezoelectric crystal (that converts sound waves to electrical impulses and back) attached to a mass that vibrates due to the motion of the part to which the sensor casing is attached. As the mass and crystal vibrate, a low voltage current is generated which is passed through a pre-amplifier and sent to the recording device. Accelerometers are very effective for detecting the high frequencies created by high speed turbine blades, gears and ball and roller bearings that travel at much greater speeds than the shafts to which they are attached

"NDT INSTITUTE IN CHENNAI.," is committed to provide most effective training with the expertise gained over the past two decades in the inspection of power stations, pressure vessels, structures, engineering components, pipe systems, storage tanks and aerospace components. Our curriculum is formalized to provide custom training programs, best practices leading to gain thorough knowledge in practical Non-destructive testing.

We are providing Level I, II Training and Certification as per Recommended Practice SNT - TC-1A -2006 in the following NDT Methods.

NDT - Central Govt.Approved NABL LAB FOR NDT - The NDT Approach

The NDT INSTITUTE & INSPECTION TECHNOLOGY LTD., (NIITL) is a NDT Course Training specialises in programmed NDT courses at level I and II encompassing both practical and theoretical techniques in the NDT disciplines as listed under the NDT Course METHODS tab on this site.

Non-destructive testing, commonly abbreviated NDT course is simply defined as the testing of materials for surface or internal flaws without causing any destruction or harm to the material under test.

Non-destructive testing is a career field that is relatively obscure in the minds of the general public.

NDT COURSE TRAINING CENTER IN CHENNAI

The name seems totally self-explanatory, but most NDT professionals can definitely relate to the experience of trying to explain what non- destructive testing means to family members, friends and acquaintances.

Most students when considering career options are completely unaware that NDT is a very exciting and rewarding career field. `Career’ being the important word.

Every bit of knowledge acquired during training, experience and certification has to be productively put to use and most importantly the learning process never ends.

The NDT Course process relies on the careful approach of the technician, his dedication, thoroughness, perseverance and the usage of sound work procedures referencing codes and specifications.

As a fundamental part of the engineering, manufacturing and in-service process, NDT Course in chennai utilises the human senses of sight, touch and hearing, amplified by a broad selection of equipment and apparatus to interpret and evaluate materials. NDT course is the most widely used chemical and physical inspection method to investigate the composition of materials by means of sound waves, electrical currents, X- and Gamma rays, magnetic fields, thermal waves and tracer liquids directed into and in most cases , penetrating the materials under test.

NDT course is particularly effective at locating performance degrading conditions such as cracking, voids, inclusions, unbonded surfaces, incorrect assembly, incorrect dimension, wall thinning, porosity, incorrect coating thickness, poorly welded fabrications, defects in castings, forgings, rolled products and defects in a host of unlimited manufacturing processes.

Essentially, Non-destructive testing assists in the detection and characterisation of material deficiencies without inhibiting the parts usefulness in any way.

Founding Statement NDT COURSES IN CHENNAI ,TAMIL NADU , INDIA

‘NIITL a company with a strong NDT present and a strong NDT future.

The NDT INSTITUTE was founded in January of 2004. As we at NIITL proceed in all our efforts, with unequivocal excellence, I aim to change that opening statement, in time to include, ‘A strong NDT Past’.

Our philosophy is to continually provide thorough and attentive service to our clients bringing the utmost level of integrity to our training efforts and to strive to maintain our knowledgeable position in the ever-changing NDT world. NIITL shall remain productive and always be a contender, employing good work ethics as a foundation for success.

As the founder of the Academy I shall endeavour to instill the highest quality in all aspects of the company. As an independent NDT training facility NIITL possess the flexibility to tailor programs to meet the client’s needs. We shall be of assistance to you, and shall be continually asking ourselves, how can we advantageously improve?

Supporting the NIITL NDT Course training facility, a NDT Certification Committee has been established employing the experience, skills and knowledge of NDT Level III’s and appropriately experienced members of the NDT community in Chennai, India . NIITL - exists as an independent body and has no involvement in the training of students.

With the establishment of the NIITL in compliance with SNT-TC-1A the prime objective in the very near future is to invite and incorporate all other NDT course training facilities and Qualifying bodies in India - NABL . to work together to establish technical harmonisation of NDT course certification. This would inspire greater confidence in the resulting certification which will facilitate mutual recognition and worldwide acceptance of the national NDT Course certificates issued in India.

At NIITL and the MTL we believe in having total transparency in our NDT training Course and certification program, and openly welcome any form of official Audit by any, and all interested parties of the NDT Institute related community at any time. With pride and dynamism we aspire to become the pre-eminent NDT training facility in Chennai. When we become aware of what is possible we begin to realise that success can be achieved, that challenges can be conquered and that problems can be solved. In doing so we open up a completely new set of avenues and possibilities, for ourselves and you.

Albert Einstein said, ‘Imagination is more powerful than knowledge.’ I believe that this is true in many respects because while knowledge allows you to see things as they are, imagination allows you to see things as they could be.

Having said that I shall leave you with the official motto of our country… India, alive with possibility.

NDT COURSE IN CHENNAI (NDT DETAILS)

LIQUID PENETRANT TESTING

One of the most common ways to enhance NDT COURSE visual testing (VT) is through the introduction of highly visible penetrating liquids. These specially prepared liquids, characterized by low a viscosity, easily enter voids open to the surface when the part is dipped into or sprayed by the penetrant.

Relatively simple, inexpensive and reliable, NDT Course liquid penetrant testing (PT) is only used for detecting discontinuities open to the surface. With the correct application, it will detect discontinuities ranging in size from the large to the microscopic.

ADVANTAGES

Liquid penetrant testing:

• NDT Course in chennai is one of the more sensitive nondestructive testing methods for detecting very small surface discontinuities.

• NDT Course in chennai can be used on a wide variety of materials, including ferrous and nonferrous metals, alloys, powdered metal products, glass and some types of organic materials.

• NDT Course in chennai can be performed with relatively inexpensive, unsophisticated equipment. If the area to be tested is small, the test can be conducted with portable equipment.

• NDT Course in chennai is capable of examining all of the exterior surfaces of objects, even of complex shapes, in one operation. Other NDT - nondestructive testing methods require the probing media to be directed to a specific surface or area, whereas liquid penetrant Testing can coat the entire part. Parts that are too large for immersion can be processed by spraying the liquid penetrant materials to provide complete surface coverage.

• NDT Course in chennai is readily adapted to volume processing, permitting 100% testing. Small parts may be placed in baskets for batch processing. Specialized systems may be automated to process as many parts per hour as required.

• NDt Course in chennai magnifies the apparent size of discontinuities, making the indications more visible. In addition, the discontinuity location, orientation and approximate length are indicated on the part, making interpretation and evaluation possible.

• NDT Course in Chennai may be adjusted to provide various sensitivity levels through the proper choice of materials and processing procedures or techniques.

DISADVANTAGES AND LIMITATIONS

The PT method has several disadvantages and limitations. Inspectors using PT should note that:

• NDT Training Institute in chennai - discontinuities must be open to the surface, as well as free of foreign material that could restrict the entry of the penetrant into the discontinuity.

• NDT Training Institute in chennai - liquid penetrants, emulsifiers (liquids that combine with oil-based penetrants to make them water-washable) and some types of developers may cause skin irritation.

• NDT Training Institute in chennai - liquid penetrants may harm some nonmetallic materials, such as rubber and plastic. There is also the possibility of permanent staining of porous or coated materials.

• NDT Training Institute in chennai - some liquid penetrant materials contain volatile solvents that can produce nausea; thus, adequate ventilation is necessary to remove noticeable vapors, especially in confined areas.

• NDt Training Institute in chennai - liquid penetrants, especially in aerosol form, are flammable. Inspectors must follow manufacture’s recommendations regarding necessary personnel protective equipment when using such equipment.

NDT TRAINING CENTER IN CHENNAI

MAGNETIC PARTICLE TESTING

NDT Training Center in chennai - Magnetic particle testing (MT) is used to detect discontinuities in ferromagnetic parts – namely parts made of iron, steel, nickel, cobalt and the alloys of these materials. Ferromagnetic materials develop strong internal magnetic fields when an electric current is passed through the part. Magnetic particles are applied to the part and a discontinuity that causes a disruption in the induced magnetic field attracts the applied particles, producing an indication.

NDT Training Center in chennai - MT is a highly effective inspection tool that is sensitive to the presence of cracks, laps, seams and similar types of surface and near-surface discontinuities.

NDT Training Center in chennai - Non-relevant indications can sometimes be found near sharp transitions in test part geometry and at metallurgical anomalies introduced during welding due to localized thermal shock, usually associated with the heat-affected zone near welds. Depending on the type of discontinuity and the direction expected, test parts should be examined in two orthogonal (perpendicular) directions because discontinuities must have a major dimension perpendicular to the magnetic field lines of force in order to be detected.

ADVANTAGES

Magnetic particle testing offers the following advantages:

• NDT - low-cost, reliable method for locating surface cracks in ferromagnetic materials.

• NDT - few limitations on size and shape of part.

• NDT - particle size and sensitivity can be adjusted.

• NDT - particles may be in colour or made to fluoresce under ultraviolet radiation.

• NDT - portable if required for field use.

• NDT - can use permanent magnets if no electrical power is available.

• NDT - can use 12 V power sources (car batteries).

• NDT - fairly fast and simple application process.

• NDT - visual interpretation of indications.

• NDT - can detect subsurface discontinuities in some conditions.

DISADVANTAGES

Disadvantages of magnetic particle testing include the following:

• NDT - can be used only on ferromagnetic materials.

• NDT - large electrical currents are required for certain test applications.

• NDT - magnetic field must be properly orientated.

• NDT - correct selection and process of application of particles can severely limit sensitivity.

• NDT - too much current is often used, masking discontinuities with spurious indications.

• NDT - false indications often occur in transition areas.

• NDT - burning of parts can occur at contact points, damaging heat treatment and, in severe cases, destroying the part.

• NDT - skin burn may occur from suspension oils.

• NDT - some fire risks occur when using open tanks and oil-suspended particles.

NDT TrAINING INSTITUTE IN CHENNAI

ULTRASONIC TESTING

Ultrasonic testing (UT) is used in the testing of nearly all solid materials, such as fine-grained aluminum, steels and alloys, composites and plastics – practically any solid material where detection of internal discontinuities or thickness measurements are of most common concern.

It is also used in the detection of inter laminar separations and regions that have been improperly processed or damaged in layered composite structures.

This technique is less effective with highly in homogeneous and coarse- grained materials (such as concrete and stainless steel castings) and non- elastic materials (such as rubber and soft plastics) that tend to absorb or scatter ultrasonic energy at relatively short distances.

This form of testing has become a commonly accepted approach to wall thickness measurement when access is limited to one side of the material. It is used in the detection and sizing of internal reflectors of ultrasonic pulses and thus is found in the testing of welds, forgings and raw materials in the form of plate, rod, pipe and similar simple geometrical shapes.

ADVANTAGES

Advantages of ultrasonic testing include:

• NDT - high sensitivity to the discontinuities that are most critical to structural integrity. For example, lack of fusion and incomplete penetration in welds are commonly detected. Also, cracks in both welds and bulk material are often very easy to detect.

• NDT - highly portable equipment, which is well suited to field inspection and inspection of in-service structures.

• NDT -application to a broad range of materials.

• NDT -in many cases, the ability to inspect very thick material, as well as the ability to detect discontinuities as small as 0.4 mm (0.016 in.) in diameter.

• NDT -in general access to only one surface is required.

• NDT -results are generated instantly with little or no processing time.

DISADVANTAGES

• Ultrasonic testing has several disadvantages and limitations. It should be noted that:

• inspection of complex shapes is very difficult.

• interpretations of UT indications require a high degree of operator training, experience and skill.

• there is a lack of definitive sizing capability, especially for diffuse discontinuities such as porosity or stress-corrosion cracking.

• discontinuities must be favorably orientated with respect to an accessible scan surface.

• a couplant, typically a liquid, must be placed on the scan surface in order for the sound to enter the part.

• typically no permanent record, comparable to a radiograph, is produced.

NDT COURSE IN CHENNAI

RADIOGRAPHIC TESTING

Inspection techniques using radiographic testing (RT) are some of the most common approaches to visualizing the internal structures of components, materials and assemblies. The approach requires a source of electromagnetic radiation that can penetrate the item being examined during exposure (the time the item is illuminated by the radiation).

Applications for RT are found throughout manufacturing and field-service environments. Raw materials are examined for the presence of internal discontinuities (castings, forgings); fabrications and assemblies are examined for induced discontinuities (welds) and misalignments or absence of internal parts; and inservice inspections use RT for detecting and assessing time-dependant degradation, such as corrosion, cracking and environmental damage.

ADVANTAGES

Radiographic testing provides the following advantages:

• NDT - can easily locate internal structural discontinuities using visual comparison with known geometric features of the test object.

• NDT - is applicable to most classes of materials.

• NDT - is considered by many to be the most universal approach to volumetric examination.

• NDT - yields a visual rendition of internal voids and fabrication errors that is readily interpretable.

• NDT -provides a permanent record of the inspection, including evidence of the sensitivity of the test when the image quality indicators (IQIs) are used.

• NDT - is capable of detecting local changes in thickness and density on the order of 1%, as measured along the line of sight of the X-ray beam.

• NDT - can provide a digital record of the test object for subsequent display on a computer monitor. DISADVANTAGES

Some disadvantages and limitations of radiographic testing include the following:

• NDT - it is a relatively expensive method of nondestructive testing.

• NDT - it is impractical to use on specimens of complex geometry.

• NDT - isolated local discontinuities, with in-line dimensions much less than 2% of the total thickness, are usually not detected.

• NDT - the specimen must lend itself to two-sided accessibility.

• NDT - laminar type discontinuities are often undetected by radiography because they are aligned transverse to the path of radiation.

• NDT - it requires highly trained and skilled personnel.

• NDT - operating licenses issued by state and federal agencies are required.

NDT TRAINING SCHOOL IN CHENNAI

EDDY CURRENT TECHNIQUE

NDT COURSE IN CHENNAI One of the more widely practiced ET techniques is eddy current testing. The flow of eddy currents is affected by fissures, constrictions or other discontinuities that cause distortions in the cross section through which the current is made to flow. Thus, the eddy current technique is useful for detecting the wall thickness of thin materials as well as measuring localized discontinuities. The thickness of the part must be within the depth of penetration (referred to as the skin depth) of the eddy currents and is dependent upon material properties and operating frequency. It is usually less than 0.635 cm (0.25 in.) and may be very much less, particularly for ferromagnetic materials.

ADVANTAGES

• NDT - Advantages of eddy current testing include the following:

• NDT - provides instantaneous results.

• NDT - uses portable equipment that may be readily adapted to automation.

• NDT - causes no damage to the material.

• NDT - presents no health hazards to the technician.

• NDT - is intrinsically safe as a testing tool, requiring only the coupling of an alternating magnetic field with the component under test to provide the interrogatory medium.

DISADVANTAGES

• NDT - Eddy current testing is affected by the following limitations:

• NDT - testing is limited to those metals and carbon fiber composites that are conductors of electrical currents.

• NDT - when the test part is composed of a ferromagnetic material, the depth of penetration into the material is vastly reduced.

• NDT - although discontinuities perpendicular to the surface being scanned are readily detected, discontinuities parallel to the surface, such as laminations, are generally not detected.

• NDT - in ferromagnetic materials, conditions such as work hardening and heat treating tend to introduce large variations in detected signals and may obscure the responses of most interest.

• NDT - Through the use of magnetic saturation techniques, however, many of these kinds of limitations can be removed.

NDT INSTITUTE AND INSPECTION TECHNOLOGY LIMITED.,

VISUAL TESTING

Throughout manufacturing and field inspection, visual testing (VT) is the most widely used NDT method.

The presence of a multitude of potential problem areas can be identified by knowledgeable observers, assisted by devices that magnify, qualify or quantify the conditions being evaluated.

WELCOME TO OUR NDT TRAINING INSTITUTE

"INSTITUTE OF NDT" NDT TRAINING INSTITUTE (METAL TESTING LAB)AWARDED CENTRAL GOVERNMENT APPROVED CERTIFIED FOR NON DESTRUCTIVE TESTING NDT -NDT TRAINING INSTITUTE IN CHENNAI, TAMIL NADU, INDIA.

OUR MAIN CONCERN METAL TESTING LAB IS AN ISO 9001:2008 Certified & NABL – Accredited (Dept.of science and Technology.Government of India) Company in India for NDT TESTING SERVICES, ASNT LEVEL I AND II COURSE CERTIFICATION , We expertise in NON DESTRUCTIVE TESTING, MATERIAL TESTING LABORATORY, WATER TESTING LAB SERVICES, CALIBRATION TESTING SERVICES and THIRD PARTY INSPECTION & CONSULTING SERVICES, NDT TRAINING & CERTIFICATION FOR NDT and NDT INSPECTION SERVICES related technologies to clients and NDT JOBS IN CHENNAI,TAMIL NADU,INDIA, MALAYSIA, SINGAPORE, and All the COUNTRIES.

(UT I) Ultrasonic Testing Level I

Overview

Ultrasonic Testing is a more advanced NDT Method. This method is able to find subsurface discontinuities in a wide range of different materials.

Duration

• Course - 10 Days (80 hours)

• Examination - 2 Days (16 hours)

Outcome

Successful candidates shall be awarded with a Level Qualification in accordance with ASNT standard ANSI/ASNT CP-105-2006 and ASNT recommended practice SNT-TC-1A.

Course content

Theory

• Ultrasonic principles and equipment controls

• Wave propagation, reflection and refraction

• Couplants, material characteristics, beam spread

• Attenuation, impedance and resonance

• Angle beam inspection with UT calculator

• Transducers and reference blocks

• Immersion inspection, contact testing, longitudinal and shear waves

• Non-relevant ultrasonic indications

• Classification of discontinuities

• Identification and comparison of discontinuities

Practical

• Set up and calibrate the equipment to a technique sheet

• Scan a sample, identify discontinuities and complete a report form

Examination

IN ORDER TO PASS THE EXAMINATION, THE CANDIDATE SHALL BE REQUIRED TO SCORE A MINIMUM AGGREGATE OF 80%.

Successful students will be able to:

• Identify, recognise and select the correct equipment to perform the inspection

• Set up and be competent to use the equipment

• Conduct an examination on test samples

• Recognise and identify defects on various samples

• Complete a standard report form

(UT II) Ultrasonic Testing Level II

Overview

Ultrasonic Testing is a more advanced NDT Method. This method is able to find subsurface discontinuities in a wide range of different materials.

Duration

• Course - 10 Days (80 hours)

• Examination - 2 Days (16 hours)

Outcome

Successful candidates shall be awarded with a Level I Qualification in accordance with ASNT standard ANSI/ASNT CP-105-2006 and ASNT recommended practice SNT-TC-1A. Course content

Theory

• Simple vibrations and periodic motion

• Acoustic spectrum

• Modes of propagation, velocity, frequency and wavelength

• Generation and detection of ultrasonic waves

• The cathode ray tube and calibration standards

• Defect sizing and evaluation techniques

• Inspection standards and reporting

• Selection of test techniques

• Interpretation of code requirements and acceptance

Practical

• Set up the equipment, calibrate and carry out a full scan on various samples

• Compile technique sheets for each sample tested

• Identify defects

• Compile written instruction for Level 1 to follow

• Test samples

• Interpret and evaluate the findings and compile reports

Examination

IN ORDER TO PASS THE EXAMINATION, THE CANDIDATE SHALL BE REQUIRED TO SCORE A MINIMUM AGGREGATE OF 80%.

Successful students will be able to:

• Organise and select the necessary equipment for a given application

• Evaluate and advise on the possibilities and limitations of the method

• Execute and supervise practical testing under workshop and field conditions

• Write instructions for approval that comply with a given code, standards or specifications

• Write technique sheets to instruct Level 1 operators

• Record testing data and acceptability results

(MT) Magnetic Particle Testing (Level I & II, Combined Course)

Overview

This course usually marks the start in a NDT Career, as Magnetic Particle Testing is the most reliable and widely used NDT Method of testing for surface breaking discontinuities in Ferro-Magnetic materials.

Duration

• Course - 7 Days (56 hours)

• Examination - 1 Day (8 hours)

Outcome

Successful candidates shall be awarded with a Level II Qualification in accordance with ASNT standard ANSI/ASNT CP-105-2006 and ASNT recommended practice SNT-TC-1A.

Course content

Theory

• Introduction

• Principles of Magnetic Particle Testing

• Electrically induced magnetic fields

• Magnetizing current characteristics

• Magnetic field distribution in and around magnetic and nonmagnetic conductors

• Current requirements

• Magnetic particle equipment

• Magnetic particle applications

• Classifications of Discontinuities

• Test Procedures and Standards

Practical

• Selection and Calibration of Equipment

• Compilation of Work Instructions and Technique Sheets in accordance with predetermined Standards

• Perform Visible and Fluorescent Tests

• Perform Magnetic Particle Testing on Welds, Castings and Forgings

• Complete Report Forms

• Interpretation and Evaluation of findings in accordance with multiple Specifications

Examination

IN ORDER TO PASS THE EXAMINATION, THE CANDIDATE SHALL BE REQUIRED TO SCORE A MINIMUM AGGREGATE OF 80%.

Successful students will be able to:

• Organise, select and calibrate the necessary equipment for a given application

• Evaluate and advise on the possibilities and limitations of a testing method

• Execute and supervise practical testing under workshop and field conditions

• Record testing data and evaluate acceptability of results according to specific acceptance criteria

• Compile a written instruction for approval that complies with a given code, standard or specification

• Record testing data and evaluate acceptability of results according to codes, standards and specifications

(PT) Liquid Penetrant Testing (Level I & II, Combined Course)

Overview

This course usually marks the start in a NDT Career, as Liquid Penetrant Testing is one of the most versatile NDT Methods for finding surface breaking discontinuities in a wide range of different Materials.

Duration

• Course - 7 Days (56 hours)

• Examination - 1 Day (8 hours)

Outcome

Successful candidates shall be awarded with a Level II Qualification in accordance with ASNT standard ANSI/ASNT CP-105-2006 and ASNT recommended practice SNT-TC-1A.

Course content

Theory

• Introduction

• Liquid Penetrant Processing

• Liquid Penetrant Testing Method

• Liquid Penetrant Testing Equipment

• Selection of Method

• Interpretation and Evaluation

• Liquid Penetrant Process Control

• Test Procedures and Standards

Practical

• Selection and Calibration of Equipment

• Compilation of Work Instructions and Technique Sheets in accordance with predetermined Standards

• Perform Visible and Fluorescent Tests

• Perform Liquid Penetrant Testing on Welds, Castings and Forgings

• Complete Report Forms

• Interpretation and Evaluation of findings in accordance with multiple Specifications

Examination

IN ORDER TO PASS THE EXAMINATION, THE CANDIDATE SHALL BE REQUIRED TO SCORE A MINIMUM AGGREGATE OF 80%.

Successful students will be able to:

• Organise and select the necessary equipment for a given application

• Evaluate and advise on the possibilities and limitations of a testing method

• Execute and supervise practical testing under workshop and field conditions

• Compile a written instruction for approval that complies with given code, standard or specification

• Record testing data and evaluate acceptability of results according to codes, standards and specifications

(WT) (UTM) Ultrasonic Wall Thickness Testing

Overview

This course usually marks the start in a NDT Career; Ultrasonic Wall Thickness Testing is one of the most widely used methods in establishing the wall thickness of a wide range of different Materials.

Duration

• Course - 4 Days (32 hours)

• Examination - 1 Day (8 hours)

Outcome

Successful candidates shall be awarded with a Level II (Limited) (A-Scan & Digital) Qualification in accordance with ASNT standard ANSI/ASNT CP-105-2006 and ASNT recommended practice SNT-TC-1A.

Course content

Theory

• History of ultrasonics

• Theory of ultrasound

• Attenuation and reflection

• Principle of thickness gauging

• Transducers and couplants

• A-Scan and digital thickness gauging

• Sources of error

• Applications

• Reporting

Practical

• Perform wall thickness measurements of samples using ultrasonic and other mechanical methods

• Selection and Calibration of Equipment

• Complete Report Forms

Examination

IN ORDER TO PASS THE EXAMINATION, THE CANDIDATE SHALL BE REQUIRED TO SCORE A MINIMUM AGGREGATE OF 80%.

Successful students will be able to:

• Demonstrate capability of measuring wall thickness to within a specific tolerance

• Recognise and correct problems encountered with wall thickness testing

• Complete a detailed report and sketch

(RT I) Radiographic Testing Level I

Overview

Radiographic Testing is a more advanced NDT Method. This method is able to find subsurface discontinuities in a wide range of different materials.

Duration

• Course - 10 Days (80 hours)

• Examination - 2 Days (16 hours)

Outcome

Successful candidates shall be awarded with a Level I Qualification in accordance with ASNT standard ANSI/ASNT CP-105-2006 and ASNT recommended practice SNT-TC-1A.

Course content

Theory

• Introduction and principles of radiography

• Structure of the atom

• X-ray and gamma ray equipment

• Interaction of radiation with matter

• Sensitivity, density and contrast

• Radiographic screens, cassettes and exposure charts

• Exposure techniques and discontinuities

• Radiation hazards, measurement of radiation and protection from exposure

• Regulatory requirements and safe use of radioactive material

Practical

• Set up the equipment, expose a sample, develop the film and interpret the results

Examination

IN ORDER TO PASS THE EXAMINATION, THE CANDIDATE SHALL BE REQUIRED TO SCORE A MINIMUM AGGREGATE OF 80%.

Successful students will be able to:

• Identify, recognise and select the correct equipment to perform radiographic exposure

• Set up the equipment to conduct a radiographic exposure

• Carry out the radiographic exposure

• Maintain a darkroom and process a radiographic film

• Determine density and sensitivity

• Recognise and identify artefacts and defects on radiographs

• Complete a standard report form

(RT II) Radiographic Testing Level II

Overview

Radiographic Testing is a more advanced NDT Method. This method is able to find subsurface discontinuities in a wide range of different materials.

Duration

• Course - 10 Days (80 hours)

• Examination - 2 Days (16 hours)

Outcome

Successful candidates shall be awarded with a Level II Qualification in accordance with ASNT standard ANSI/ASNT CP-105-2006 and ASNT recommended practice SNT-TC-1A.

Course content

Theory

• Radiation and radiation machines

• Nuclear reactions and radioisotopes

• Interaction of radiation with matter and control of scattered radiography

• Radiographic screens and special radiographic techniques

• Processing facilities and processing of films

• Viewing and interpretation of radiographs

• Radiation protection

• Interpretation of code requirements and acceptance criteria

• Preparation of technique sheets and written instructions

Practical

• Perform a test using a technique sheet compiled by the candidate

• Compile a written instruction and record the findings of the test

• Set up the equipment, expose a sample, develop the film and interpret the results

Examination

IN ORDER TO PASS THE EXAMINATION, THE CANDIDATE SHALL BE REQUIRED TO SCORE A MINIMUM AGGREGATE OF 80%.

Successful students will be able to:

• Organise and select the necessary equipment for a given application

• Evaluate and advise on the possibilities and limitations of the method

• Execute and supervise practical testing under workshop and field conditions

• Write instructions for approval that comply with code requirements

• Write technique sheets for Level 1 operators to a given code or specification

• Record testing data and evaluate acceptability