In the stainless steel welded pipe industry, there is almost a common problem of the pipe defect is the surface of the pipe has a strain, and there are many reasons for the strain, one of the factors is the choice of welded pipe mold, here to suggest to everyone:if you are afraid of the strain, and choose SENWEL(Guanxiugang) welded pipe mold, quality is guaranteed.

The surface strain of welded pipe caused by mold is not a few case, the main reasons are design factors, processing technology factors, transportation failure factors and so on.The main design factor is that the mould design and forming method of welded pipe is unreasonable, which causes the steel strip to move in the mould pass before and after the coil forming, and causes the hard friction or the scratch.Processing technology factors are mainly in the process of welded pipe mold processing, not through the finish machining and Secondary finish machining, as well as the surface grinding processing,resulting in the mold surface finish is not enough, rough, and case a strain in the surface of welded pipes.Transportation factor is that after excluding the above two factors, in the process of transportation and handling, the welded pipe molds may expand between each other, resulting in surface scratches and a strain defect during production.