... ,Q345B,L175,L210,L245 Stardard: GB/T9711.1 gas and line pipePlace of originTianjin China(Mainland)Applicationoil pipeWelding line ... , X42, L45StandardGB/T9711.1Length5m-12mUsageline pipe, casing and tubing, fluid pipe, water delivery, heating pipe, power pipe, structure pipe, ... -Seam Heat Treatment-Air/Water Cooling-Body/Seam UT-Sizing Straightening-Cutting-Visual and dimension Inspection-Hydraulic Test ...