... , Q345, St33, St37-2, SS330, SS400, ASTM A 106B, ASTM A53, X42Quality:Manufactured to meet ISO9001, ASTM, API, SAE, DIN, BS, GB and SY ... requirement.100*1001.2—5.75400*4007.75-11.75Black pipe are usually with anti-rust our black painting on surface ... /T6725,GB/T3094,TSAM A500,EN10210,GB/T9711.1-1997, API Material:Q195, Q215,Q235,Q345,ST37-2,ST52-3,S235 ...