... 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 ... . Atractive price and delivery timecarbon steel :1010,1012,1025-1060,15#,20#,30#,45#,q195,q235,Q345,GRADE :A/B/C/D ... at sightmain products :elbows ,flange ,tee ,bends ,caps ,cross 12CrMoV ALLOY STEEL pipe