Welded steel pipe should do mechanical performance test and flattening test and flaring test, and it needs to meet the requirements of the standard regulations. Steel pipe should be able to withstand a certain internal pressure, if necessary, it can be implemented 2.5Mpa pressure test, to maintain a minute without leakage. Allowing eddy current testing instead of hydrostatic testing. Eddy current testing is implemented according to GB7735 "steel pipe eddy current testing method" standard. Eddy current testing method is fix the probe on the rack, flaw and weld maintain the distance of 3 ~ 5mm, relying on the rapid movement of the pipe to conduct a comprehensive scan of the weld, flaw detector by the eddy current detector automatic processing and automatic sorting to achieve the purpose of testing. After the inspection of the welding pipe is cut off with the provisions of the length,then through the flip frame off the assembly line. Steel pipe ends should be flat head and bevel edge, print mark, finished tube with hexagonal strapping packaging factory.
