... stainless steel pipe and tube s:0.5-30mm D 6-630mm, Length:0-2000mm Standard:AISI,GB,ASTM 201 steel pipe ... and tube1.Grade: 201, 202, 304, 304L, 316L, 309S, 321 ... customers' requestsStandardASTM/A249, A312, GB151, GB12771, HG20537MaterialGrade: 304, 304L,310s 316, 316L,321,840SurfaceStain Direction / Mirror ... wares,kitchen wares 304 stainless steel pipe /tube