21)Technique: welded 2)Payment term:T/T L/C 3)FOB price: 620-700usd/t 4)Certificates:ISO 9001;2008 5)Length:2-12m ASTM Black Steel PipeO.D19—630 mmW.T0.6-35 mmO.D tolerance±8%Thickness Tolerance±5%Length6m in normal; also according to customers’ requirementsStandardBS, ASTM, EN, API 5L, API 5CT, DIN, GB/T, etc.TechniqueweldedProduct CategoryMetallurgy, Mineral & EnergyMaterialQ195/Q215/Q235/Q345/ ...