... certification 1. Type:alloy steel pipes,carbon steel pipes,stainless steel pipes,welded steel pipes and so on2. Materials:carbon steel,alloy steel,stainless steel.3. Standard:ISO9001 ... ,oCr18Ni9,302.s30200,s30300,303,304,s30400s,304l,321,s32100certificate :API,ISO,BV,CS,CE,EN ......delivery term :FOB (30%deposite ... sightmain products :elbows ,flange ,tee ,bends ,caps ,cross 12CrMoV ALLOY STEEL pipe