The difference between seamless steel pipe and fake seamless steel pipe, fake seamless steel pipe is welded pipe, after grinding hot work can not see the weld. There are several common market pipe, straight seam welded pipe, spiral welded pipe and seamless pipe, but the longitudinal welded pipe and spiral welded pipe are very well recognized, seamless pipe and seamless steel pipe can be distinguished from the following aspects look:
1, The pipe is generally fixed length, and are generally 6 meters, 9 meters or 12 meters. Seamless steel pipe length is very small, because the factory price increase is very much.
2, It can be seen from the cross-section of the pipe head, if rust, then wipe him earn, look carefully, then you will find the welding area.
3, If you use pickling, the effect is most obvious.
4, Check the wall thickness, seamless wall thickness is not uniform, fake seamless steel pipe wall thickness is even.
