... steel pipe 1.Standard: ASTM, JIS, DIN, EN. 2.OD: 6-530mm 3.TK:0.8-28mm 4.Surface:Polished, frosting 310 stainless steel ... check the following products that we can supply:The stainless steel pipestandardASTM,GBmaterial201,202,301,304,316,316L ... and so onProduction technologySeamless steel pipeWelded steel pipeSurface treatmentPolishing or not The stainless steel barstandardASTM,GBmaterial201,202,301, ...