Peter Fordham has written:

'Non-destructive testing techniques' -- subject(s): Non-destructive testing, Nondestructive testing

NO.

Destructive testing will destroy the test coupon on new welded construction, non-destructive tests are often done as well. Non-destructive testing will not destroy any repair made and is preferable to destroying a repair.

HOWEVER:

Pressure vessels repaired by welding MUST be tested by destructive (hydrostatic) testing as the design of the vessel has a built in factor of safety that ensures the vessel won't be destroyed at the pressure used for the test.

If a destructive test is done then no NDT is required usually.

Destructive and Non Destructive Testing:

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.

In Destructive Testing, tests are carried out to the specimen's failure, in order to understand a specimen's structural performance or material behaviour under different loads. These tests are generally much easier to carry out, yield more information, and are easier to interpret than non destructive testing.

Destructive testing is most suitable, and economic, for objects which will be mass-produced, as the cost of destroying a small number of specimens is negligible.

There is no disadvantages in this Non Destructive Courses in chennai. because this course having so many advantages so in this course advantages only placed.

Non-destructive testing is a scientific term. When a scientist studies a piece of material they often have to break it down to study what it's made of. With non-destructive testing the object is kept intact and not modified.