gas and oil line pipe Normal OD: 42.3-244.5mm Wall thickness: 3-14mm Grade: Q235B,Q345B,L175,L210 ... ,L245 Stardard: GB/T9711.1 gas and ... X42, L45StandardGB/T9711.1Length5m-12mUsageline pipe, casing and tubing, fluid pipe, water delivery, heating pipe, power pipe, structure pipe, scaffold, piling pipeManufacture processesRaw ...