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.
Showing posts with label Ndt Inspection. Show all posts
Showing posts with label Ndt Inspection. Show all posts
17 September 2013
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.
originally found here;- http://www.ndtindia.org/accrediations.html#acc
13 September 2013
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
5 September 2013
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
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