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Nondestructive welding inspection, as the name suggests, deals with the examination of a welded object for defects without ruining it for future use. Tulsa Welding School can train you for these kinds of nondestructive welding inspections.
A weld needs to be tested for its weld quality, which indicates its ability to perform its function without any breakage or such for a long period of time. Nondestructive welding inspection does that without causing any problem to the weld being inspected.
Methods of Nondestructive Welding Inspection
Magnetic particle testing can detect short length and shallow surface cracks. But it has reduced sensitivity when there is any kind of surface coating. Also, it cannot be used outside and on wet surfaces. It is applicable to ferromagnetic materials only.
Radiographic methods use X-Ray or gamma rays to test for interior flaws of even microscopic nature, somewhat like what you do in a body X-ray. It is costly. It requires special safety precautions and cannot be used for lamellar flaws.
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Ultrasonic testing is used for surface and sub surface flaws, mainly volumetric flaws. It is not as sensitive as magnetic particle testing in detecting fine surface flaws. It requires a very high degree of operator skill as well. It permits inspecting those joints which are accessible to radiographic equipments.
Eddy current can be used to detect surface flaws on surfaces with thick surface coatings. It can be used on wet surfaces as well. The only drawback is that it can cover only one small area at a time and several scans will be needed.
Liquid penetrant testing uses fluorescent dyes to check for surface flaws. The advantage here is that it can be used for both magnetic and non magnetic materials. It is also low cost. But it can only be used for surface level testing. It can’t be used on hot assemblies.
Nondestructive welding inspection is used in places where you cannot destroy the object under testing, for example in industries or in testing infrastructure such as piping, bridges, and similar structures so that you may be sure that the structure will stand or do whatever it is supposed to do.
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Nondestructive welding inspection requires specially trained testing inspectors; which is why Tulsa Welding School teaches these techniques. They have locations in Tulsa, OK, and Jacksonville, FL, but they welcome students from all over the country. If you live in Texas, Georgia, Alabama, or many other states, there is a Tulsa Welding School representative in your area available to inform you about all the benefits of attending our welding vocational training.
Information for this article can be found at:
www.ndt.net
