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What are the test methods for API 5L X42 Seamless Pipe?
API 5L X42 Seamless Pipe is widely used in critical applications where there is the high risk of cracking damage due to hydrogen. Such applications demand the pipes which are made of high-quality raw materials. Various manufacturers use solid billets of killed steel to make the pipes. If the steel used to manufacture seamless pipe is strong and tough then it can tolerate this process otherwise it will break down. This difference can be easily seen in the variety of seamless pipe offered by different suppliers as some use inferior quality steel. Therefore, one should check the certifications before ordering them.
The pipe should meet the API, ASME, ASTM and CSA standards which prescribes their mechanical and chemical properties. These pipes are supplied in all sizes, grades, and weights. These pipes are tested before they are supplied. Various tests that are performed on API 5L X42 Seamless Pipe are as follows:
Test methods for pipes are:-
Hydrostatic test- the pipe should withstand the hydrostatic test. This test ensures that pipe does not offer any leakage while operation. This is an important test and pipes should pass it and if it doesn't then it is not suitable to be used for various critical applications.
Bend test- in this test, cracks and damage are checked in sample pipes. During the test, the condition of welding is also checked. The welding should not open during the test.
Flattening test- this test verifies the deformation performance. During the test, the pipe should show resistance to circumferential cracking, longitudinal cracking, surface defects and internal defects as well.
Once API 5L X42 Seamless Pipe passes all the above-mentioned tests, it can be packed and supplied to the buyers.