What are Some Uses of NDT Methods?

What are Some Uses of NDT Methods?

Flaw Detection and Evaluation
Leak Detection
Location Determination
Dimensional Measurements
Structure and Microstructure Characterization
Estimation of Mechanical and Physical Properties
Stress (Strain) and Dynamic Response Measurements
Material Sorting and Chemical Composition Determination

originally found here:- http://www.ndtindia.org/classification-of-ndt-methods.html

ndt equipments

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Nondestructive Testing

Destructive And Nondestructive Testing

Ndt Test For Concrete

Ndt Ultrasonic Testing

Visual Inspection Ndt Testing

Rockwell Superficial Hardness Test

Dye Penetration Test

Core Cutting Test For Soil

Rebound Hammer Test On Concrete

Area Of Application of Non-destructive testing (NDT)

Area Of Application of Non-destructive testing (NDT)

Non-destructive testing is used for assuring quality in a large number of sectors and industries including:
The energy sector
Offshore
The construction and civil engineering sector
The transport sector
Engineering works
The ship building industry
The petrochemical and chemical industries
The medicinal industry
The food processing industry


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REBOUND HAMMER TESTING

Rebound Hammer Test

Rebound Hammer Test On Concrete

Rebound Hammer Testing

Test Concrete Using Rebound Hammer

Surface Hardness Test Using A Rebound Hammer

CORE CUTTING

CORE CUTTING

Core Cutting Test For Soil

Core Cutting Test

Core Cutting Test For Concrete

Core Cutting Test For Soil

Core Cutter Test

DYE PENETRATION

DYE PENETRATION

Portable Hardness

Portable Hardness

Hardness of materials has probably long been assessed by resistance to scratching or cutting. Relative hardness of minerals can be assessed by reference to the Mohs scale that ranks the ability of materials to resist scratching by another material. 

The different methods and differently shaped indenters used by, for example, Brinell and Rockwell produce dissimilar responses of the material under test. To compare the hardness of two different samples, both must be measured using the same hardness scale, or a scale must be developed to convert from one measurement to the other.

The relationship of load to the area or depth of indentation is a measure of hardness, such we could found in Brinell, Rockwell, Vickers hardness testing. For practical and calibration reasons, each of these methods is divided into a range of scales, defined by a combination of applied load and indenter geometry.

originally found here:- http://www.ndtindia.org/portable-hardness.html

Testing Requirements

Testing Requirements

The luminance at the surface shall be minimum 500 lx. If required to obtain a good contrast and relief effect between imperfections and background, an additional light source should be used.
For performance of direct inspection, the access shall be sufficient to place the eye within 600 mm of the surface to be inspected and at an angle not less than approximately 30degree. If not otherwise agreed all weld connections in question should be 100% visually inspected.
The testing volume shall as a minimum cover the zone which includes welds and parent metal for at least 20 mm on each side of the weld. In case of doubt, visual testing should be supplemented by other non-destructive testing methods for surface inspections.
The weld surface shall be free of weld spatter, slag, scale, oil, grease, heavy and loose paint or other surface irregularities which might avoid imperfections from being obscured. It can be necessary to improve the surface conditions e.g. by abrasive paper or local grinding to permit accurate interpretation of indications.

originally found here:- http://www.ndtindia.org/visual-inspection.html

Visual Inspection Equipment

Visual Inspection Equipment

The following equipment may be needed:

·         Mirrors (especially small, angled mirrors)

·         Magnifying glasses, eye loupes, multi lens magnifiers, measuring magnifiers

·         Microscopes (optical and electron)

·         Optical flats (for surface flatness measurement)

·         Borescopes and fiber optic borescopes

·         Optical comparators

·         Photographic records

·         Closed circuit television (CCTV) systems (alone and coupled to borescopes/microscopes)

      originally found here:-http://www.ndtindia.org/visual-inspection.html

Services for Visual Inspection

Services for Visual Inspection

·         Inspection of suspicious areas

·         Predictive maintenance applications

·         Full inspection recording

·         Consultancy Service

·         Reports

·         Training

    originally found here:- http://www.ndtindia.org/visual-inspection.html

Advantages of Ultrasonic Investigation

Advantages of Ultrasonic Investigation

1.     High sensitivity to both surface and subsurface discontinuities, permitting the detection of extremely small flaws.

2.     Greater accuracy than other nondestructive methods in determining the depth of internal flaws and the thickness of parts with parallel surfaces.

3.     Nonhazardous to operations or to nearby personnel and has no effect on equipment and materials in the vicinity.

4.     Capable of portable or highly automated operation.

5.     The depth of penetration for flaw detection or measurement is superior to other NDT methods.

6.     Only single-sided access is needed when the pulse-echo technique is used.

poriginally found here:- http://www.ndtindia.org/ultrasonic-investigation.html

Ultrasonic Pulse Velocity Test

Ultrasonic concrete testing is based on the pulse velocity method to provide information on the uniformity of concrete, cavities, cracks and defects. The pulse velocity in a material depends on its density and its elastic properties which in turn are related to the quality and the compression strength of the concrete. It is therefore possible to obtain information about the properties of components by sonic investigations. Test Method: IS 13311 (Part 1) 
The pulse velocity in concrete may be influenced by
a) Path length 
b) Lateral dimension of the specimen tested 
c) Presence of reinforcement steel 
d) Moisture content of the concrete

originally found here:- http://www.ndtindia.org/ultrasonic-investigation.html

Ultrasonic Flaw Detection Test

Ultrasonic Flaw Detection Test

Ultrasonic flaw detection is basically a comparative technique. Using appropriate reference standards along with knowledge of sound wave propagation and generally accepted test procedures, a trained operator identifies specific echo patterns corresponding to the echo response from good parts and from representative flaws. The echo pattern from a test piece may then be compared to the patterns from these calibration standards to determine its condition. Sound waves are simply organized mechanical vibrations traveling through a medium, which may be a solid, a liquid, or a gas. These waves will travel through a given medium at a specific speed or velocity, in a predictable direction, and when they encounter a boundary with a different medium they will be reflected or transmitted according to simple rules. This is the principle of physics that underlies ultrasonic flaw detection.

originally found here:- http://www.ndtindia.org/ultrasonic-investigation.html

Non destructive testing

Non destructive testing

CLIENTS OF NDT LAB

CLIENTS OF NDT LAB

• CPWD
• NDMC
• PWD-Delhi
• Indian Railways
• Hindustan Pretab Ltd
• DLF Projects
• Larsen & Toubro
• Apollo Pharmacy
• Panacea Biotec
• Adani Power Ltd.
• Gammon India Ltd.
• Gactel Turnkey Projects Ltd.
• Supreme Industries Ltd.
• Gallant Metal Ltd.

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PRIVACY POLICY OF NDTINDIA

PRIVACY POLICY OF NDTINDIA

Thank you for visiting the Non Destructive Testing Lab web site. We are committed to the privacy of our visitors. We collect no personal information about you when you visit our web site unless you choose to provide that information to us.

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TERMS OF USE OF NDTINDIA

TERMS OF USE OF NDTINDIA

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Nondestructive testing or Non-destructive testing (NDT)

 Nondestructive testing or Non-destructive testing (NDT)

Nondestructive testing or Non-destructive testing (NDT) is a wide group of analysis techniques used in science and industry to evaluate the properties of a material, component surface & subsurface without causing damage or effect to their future performance or properties. Non-destructive testing is used to detect abnormalities in physical, chemical or electrical characteristics.

NDT provides an edge over conventional methods as it is a fast, cheap and easy process. In 1930s, non destructive testing, where it had been heard of at all, was generally considered an evil. Later it became a necessary evil. For a number of years now NDT has been a necessary aid. NDT has saved uncounted thousands of lives. Non destructive testing is not confined to crack detection. Other discontinuities include porosity, wall thinning from corrosion and many sorts of disbond.
originally found here:- http://www.ndtindia.org/application.html

Core Cutting

originally found here:-  http://www.ndtindia.org/core-cutting.html

 

Dye Penetration

 

originally found here:- http://www.ndtindia.org/dye-penetration.html

Portable Hardness

Hardness is a material's resistance to penetration. In general, an indenter is pressed into the surface of the material to be tested under a specific load for a definite time interval, and a measurement is made of the size or depth of the indentation.
Hardness properties include such varied attributes as resistance to abrasives, resistance to plastic deformation, high modulus of elasticity, high yield point, high strength, absence of elastic damping, brittleness or lack of ductility.

originally found here:- http://www.ndtindia.org/portable-hardness.html

Visual Inspection

Visual Inspection is one of the most widely used Non-Destructive Testing methods for the detection of discontinuities before they cause major problems, e.g. poor welding, surface defects, corrosion pits, general condition, degradation, blockages and foreign materials.

Visual Inspection means the inspection of equipment and structures using a combination of human senses such as vision, hearing, touch and smell. Visual Inspection is sometimes carried out in conjunction with devices such as a low power magnifying glass, boroscopes, fiberscopes, digital video borescopes, camera systems and robotic crawler systems.
originally found here:- http://www.ndtindia.org/visual-inspection.html

Ultrasonic Investigation 

 Ultrasonic Flaw Detection Test

Of all the applications of industrial ultrasonic testing, flaw detection is the oldest and the most common. Since the 1940s, the laws of physics that govern the propagation of sound waves through solid materials have been used to detect hidden cracks, voids, porosity, and other internal discontinuities in metals, composites, plastics, and ceramics. High frequency sound waves reflect from flaws in predictable ways, producing distinctive echo patterns that can be displayed and recorded by portable instruments. Ultrasonic testing is completely nondestructive and safe, and it is a well established test method in many basic manufacturing, process, and service industries, especially in applications involving welds and structural metals.
originally found here:- http://www.ndtindia.org/ultrasonic-investigation.html
 

ENQUIRY about NDT TESTING

Sigma Test & Research Centre 
Address : BA-15, Mangolpuri Industrial Area, Phase-2,
New Delhi, India-110034
Phone : + 91-11-49491444
Fax : + 91-11-43852040
Email : info@sigmatest.org

CLASSIFICATION OF NDT TEST METHODS

CLASSIFICATION OF NDT TEST METHODS

Basic Categories	Objectives
Mechanical and optical	color, cracks, dimensions, film thickness, gaging, reflectivity, strain distribution and magnitude, surface finish, surface flaws, through-cracks
Penetrating radiation	cracks, density and chemistry variations, elemental distribution, foreign objects, inclusions, microporosity, misalignment, missing parts, segregation, service degradation, shrinkage, thickness, voids
Electromagnetic and electronic	alloy content, anisotropy, cavities, cold work, local strain, hardness, composition, contamination, corrosion, cracks, crack depth, crystal structure, electrical and thermal conductivities, flakes, heat treatment, hot tears, inclusions, ion concentrations, laps, lattice strain, layer thickness, moisture content, polarization, seams, segregation, shrinkage, state of cure, tensile strength, thickness, disbonds
Sonic and ultrasonic	crack initiation and propagation, cracks, voids, damping factor, degree of cure, degree of impregnation, degree of sintering, delaminations, density, dimensions, elastic moduli, grain size, inclusions, mechanical degradation, misalignment, porosity, radiation degradation, structure of composites, surface stress, tensile, shear and compressive strength, disbonds, wear
Thermal and infrared	bonding, composition, emissivity, heat contours, plating thickness, porosity, reflectivity, stress, thermal conductivity, thickness, voids
Chemical and analytical	alloy identification, composition, cracks, elemental analysis and distribution, grain size, inclusions, macrostructure, porosity, segregation, surface anomalies

originally found here:- http://www.ndtindia.org/classification-of-ndt-methods.html

Approvals For Ndt Testing

 

Approvals For Ndt Testing

•  PWD

• CPWD

• Indian Railways

• DSIIDC 

  originally found here :- http://www.ndtindia.org/accrediations.html

Accrediations

• NABL

• ISO 17025:2005

• ISO 14001:2004

• Drug Controller of Iindia

• State Drug Control Authority

• ISO 9001:2008 Accredation from joint Accredation System of Australia & New Zealand(Jas-Anz).

  originally found here :- http://www.ndtindia.org/accrediations.html

 

SIGMA TEST & RESEARCH CENTRE

has been setup with zeal to provide excellence in testing services and to offer innovative and exceptional analytical process.

At sigma, we provide accurate and consistent results and one stop access to our wide range of building material testing, calibration and non destructive testing services, which makes all the difference.

Nondestructive testing has been defined as comprising those test methods used to examine an object, material or system without impairing its future usefulness. Nondestructive testing is used to investigate the material integrity of the test object. Non-destructive testing is used to detect abnormalities in physical, chemical or electrical characteristics. Nondestructive testing is concerned in a practical way with the performance of the test piece - how long may the piece be used and when does it need to be checked again?

The strength of the group lies in its dedicated, multi discipline professionals, expert and experienced governing board, innovative management and high accuracy measuring instruments & computerized data management system.  originally found here :- http://www.ndtindia.org/profile.html