... grade material in China. 2,advanced testing equipment. 3,competitive price . stainless steel pipe 3091.ASTM,DIN,JIS,EN,KS,ASMEASTM ... 316,316L,316Ti,321,347h,904l201,2023.stainless steel pipe 309 polished,annealing. stainless steel pipe 309 1.Sizes:Diameter:6-610mm Wall ... to ANSI B36.19/36.102. Surface finish: pickling, annealing, manual polish and mechanical polish;3. Technical: cold rolled, ...