... , X65, X42, L45StandardGB/T9711.1Length5m-12mUsageline pipe, casing and tubing, fluid pipe, water delivery, heating pipe, power pipe, structure pipe, scaffold, piling pipeManufacture processesRaw material Test ... /Water Cooling-Body/Seam UT-Sizing Straightening-Cutting-Visual and dimension Inspection-Hydraulic Test-End Beveling-Flatten Test-Seam/End UT-Length ...