gas and oil line pipe Normal OD: 42.3-244.5mm ... Q235B,Q345B,L175,L210,L245 Stardard: GB/T9711.1 gas and line pipePlace of originTianjin China(Mainland)Applicationoil pipeWelding line ... 14mmMaterialX70, X65, X42, L45StandardGB/T9711.1Length5m-12mUsageline pipe, casing and tubing, fluid pipe, water delivery, heating pipe, power pipe ... tied;3.according to the customers' requirement gas and oil line pipe