There are lots of standards for using various seamless steel pipes, which are listed as follows:
Stainless Steel Seamless Pipe for Structure Support GB / T8162
Stainless Steel Seamless Pipe for Oil-drilling YB528-65
Stainless Steel Seamless Pipe for Conveying Fluid GB / T8163-99
Seamless steel pipe for ship GB5312-85
Stainless Steel Seamless Pipe Medium pressure boiler GB / T3087-99
Stainless Steel Seamless Pipe for Petroleum casing API5CT
Stainless Steel Seamless Pipe for Geological Drilling YB235-70
Stainless Steel Seamless Pipe for Automobile Semi-axis GB3088-8
Stainless Steel Seamless Pipe S for fertilizer Support GB6479-86
Stainless Steel Seamless Pipe for Hydraulic prop   GB173-98
Stainless Steel Seamless Pipe for Oil Cracking GB9948-88
Pipeline Steel ASTMA53B / 106B / API 5L B
Stainless Steel Seamless Pipe for High pressure boiler DIN17175 ST45.8-Ⅲ GB5310-95 20G