... steel tubes and pipes Dimension,thickness,length,material, and so on, all of those can be customized as per your requests. Stainless steel pipe(seamless ... :201,202,301,304,304L, 309S,310S,316L,321,430 and so onStandard:ASTM,GB,JIS,DIN Surface:annealing,pickling,polishing ... :201,202,301,304,304L, 309S,310S,316L,321,430 and so onStandard:ASTM,GB,JIS,DINSurface:2B,BA,No.1 ...