The operation steps of non-destructive testing of weld seam of steel structure

Preparation: Choose the appropriate flaw detection method and equipment according to the material, structural shape and size of the inspected work piece. At the same time, calibration and debugging of flaw detection equipment to ensure that it is in normal working condition.

Surface treatment: clean and polish the weld surface, remove oil, rust and other impurities, and ensure that the probe is in close contact with the weld surface. For the weld that needs to be detected by magnetic particle, it also needs to be magnetized.

Detection operation: operate according to the selected detection method, pay attention to control the moving speed and direction of the probe to ensure full coverage of the weld area. At the same time, record the data and abnormalities during the flaw detection process. 

Analysis of results: analyse and judge the results of the flaw detection to determine whether there are defects inside the weld and the type, size and location of the defects and other information. For the defects found should be timely treatment and repair.

Report preparation: the results of flaw detection is collated into a report form, including flaw detection methods, equipment parameters, flaw detection process, defects and other content. The report should be clear, accurate and reliable data to provide a basis for subsequent repair and maintenance.