Manufacturing process of stainless steel seamless pipe

Such steel pipes can be divided into two categories: stainless steel seamless steel pipes and stainless steel welded steel pipes (seamed pipes), which can be made according to different manufacturing processes
For: hot rolling, extrusion, cold drawing and cold rolling these basic types, according to the cross-sectional shape can be divided into round pipe and special-shaped tube, widely used is round steel pipe, but there are also some square, rectangular, semi-circular, hexagonal, equilateral triangle, octagonal and other special-shaped stainless steel pipes.
For the steel pipe under fluid pressure to carry out hydraulic test to test its pressure resistance and quality, under the specified pressure does not leak, wet or expand as qualified, some steel pipes also according to the standard or demand requirements for crimping test, flaring test, flattening test.
Seamless stainless steel pipe, also known as stainless steel seamless pipe, is made of steel ingots or solid tube blanks made of capillaries by perforation, and then made by hot rolling, cold rolling or cold drawing. The specifications of seamless steel pipes are expressed in the number of millimeters of outer diameter * wall thickness