... w.t.: SCH10-SCH160,SGP,STD,XS,XXS, 3.material : ASTM A234 WPB , DIN , JIS, Hebei Tengjian Pipe Fittings Manufacture ... ., LtdProductionSteel pipe fittingTypeSeamless and ERWSize1/2" To 48"Wall thicknessSch10-Sch160, XS,XXSStandardsANSI, ASTM,API,DIN, JIS, BS, ISO, GB, SH, ... AND HG etc Materialstainless Steel: ASTM A403,WP304,304L,310,316,316L,321,347etcSurface treatmentBlack painting ...