In the process of manufacturing and using welded pipe, nondestructive testing to ensure weld quality is particularly important. The common nondestructive testing methods for welded pipes are: ultrasonic testing, off-line magnetic flux leakage testing and eddy current testing; Ultrasonic flaw detec

Penetrant testing (abbreviated as PT) is a nondestructive testing method for inspecting surface opening defects based on the principle of capillary action. This method is one of the five conventional nondestructive testing methods and is a comprehensive science and technology.

Why should steel pipes be heat treated?The function of heat treatment is to improve the material mechanical properties of steel pipe, eliminate residual stress and improve its cutting performance.According to different purposes of heat treatment, heat treatment process can be divided into two catego