... ,ASME,DIN,JIS Certificate:API,ISO,CCS SCH 40 steel tube ProductionSteel pipeTypeSeamless and ERWSize1/2" To 24"Wall thicknessSch5S-Sch160 ... etc MaterialStainless Steel: TP304, TP304L, TP316,TP316L,TP310S,TP321,TP202.Carbon Steel: ASTM A53/A106,ASTM A179,API 5L X42/52 ... , CCS,and ISO9001:2000Productivity200000 ton per yearKeywords: SCH 40 steel tube,carbon steel tube,seamless tube