... ASME,DIN,JIS Certificate:API,ISO,CCS SCH 40 steel tube ProductionSteel pipeTypeSeamless and ERWSize1/2" To 24"Wall thicknessSch5S-Sch160 ... 3467,DIN17175-79Surface treatmentBlack painting, anti-rust varnish, anti-rust oil, hot galvanized,3PE coating, epoxy coating.PackingPlastic pipe cap, ... CCS,and ISO9001:2000Productivity200000 ton per yearKeywords: SCH 40 steel tube,carbon steel tube,seamless tube