... material in China. 2,advanced testing equipment. 3,competitive price . stainless steel pipe 3091.ASTM,DIN,JIS,EN,KS,ASMEASTM ... 1/4",1 1/2",2",2 1/2",3",3 1/2",4",5",6",8",10",12",14 ... Surface finish: pickling, annealing, manual polish and mechanical polish;3. Technical: cold rolled,cold drawn,hot rolled.4. Chemical ... packed in seaworthy --wooden cases or as request. High quality 309 stainless steel pipe