Stainless Steel Welded Pipe Precision

- Sep 05, 2018 -

                                                                                                                                                                 ——From Hongwang

The stainless steel welded pipe is formed by welding stainless steel material or steel strip through unit and die, and its strength is generally lower than a seamless steel pipe.


The dimensional accuracy of inner and outer diameter(tolerance range) is strict, and the inner and outer surface finish, roundness, straightness is good. Also the wall thickness is uniform. The main technical indexes of the stainless steel welded pipe produced by this technology have reached or partially exceeded the national standard GB12771--2002 and Requirements of the standard ISO 4394/I-1980 (E). If the accuracy of the stainless steel welded pipe is quite different, it can not be utilized well. Therefore, we should control the accuracy of the stainless steel welded pipe effectively.


The surface density of the stainless steel welded pipe is relatively large, and it can reach about 260 mesh even without polishing the outer surface. If the stainless steel welded pipe is polished inside and outside, the straightness will decrease. Therefore, if there is special requirement for the straightness of the steel pipe, it is generally not recommended to carry out the polishing treatment. The polished surface of the stainless steel welded pipe is already bright. It has excellent comprehensive performance, can withstand high pressure, cold bending, flare, flattening without cracking, wrinkle-free skin, and can perform various complicated deformation and mechanical processing. After vacuum annealed, the steel pipe can be processed. Stainless steel welded pipes are generally used in the production of mechanical structures, hydraulic equipment, machinery and other production areas.


Since the size of the stainless steel welded pipe can be customized according to the user's needs, and the tolerance range is well controlled, it can be directly used on the mechanical equipment, and don’t need to process again, which can save costs and greatly save machining time, increase production and material utilization.

Therefore, the precision of stainless steel welded pipe products is generally controlled at about 0.02 mm.


  The polishing of its inner and outer is very important. Generally speaking, steel pipes within a diameter of 89 mm have a high surface finish after polishing. However for stainless steel welded pipes of 89 mm or more, especially 108 mm or more, the outer surface is not well. If the surface of the welded pipe is required to have no pitting and no small holes, it is generally required to be polished after buffing, and then automatically polished.

Contact: Una Chen

WuXi XiChu Stainless Steel Co.,Ltd


Add: B2-135,Stainless Steel Market, No.82 North XueDian Road

         City Wuxi, JiangSu, 214000,China

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