Product description:
-Diameter :33-406mm wall thickness :3-20mm
Material: Q235, Q345
Standard: GB/T3091-2008
 
Straight seam welded steel pipe is a straight seam welded by high frequency welding unit to the specifications of a long strip of strip rolled into the round tube and pipe. Welded steel pipe should do the mechanical performance test and flattening test, flaring test, and To achieve the standard requirements. The pipe should be able to withstand a certain degree of internal pressure 2.5Mpa pressure test, when necessary, for one minute without leakage. Allows the use of eddy current testing method instead of the hydrostatic test. The eddy current testing according to GB7735 pipe eddy current testing, the test method standard. Eddy current testing method is the probe fixed to the rack, flaw detection and weld to maintain a distance of 3 ~ 5mm, comprehensive scanning rely on the rapid movement of the steel pipe welds, flaw detection signal by the automatic processing of the eddy current flaw detector and automatic sorting to achieve the purpose of flaw detection.