... management 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 ... :ISO9001,2000 certified,ANSI,JIS,DIN,BS,other standards are also available4. Size:1/2- ... products :elbows ,flange ,tee ,bends ,caps ,cross 12CrMoV ALLOY STEEL pipe