... X42, L45StandardGB/T9711.1Length5m-12mUsageline pipe, casing and tubing, fluid pipe, water delivery, heating pipe, power pipe ... pipeManufacture processesRaw material Test-Uncoiling-Strip leveling-End Cutting-End Shearing and welding-Accumlator-Forming-Telepathy Welding- ... Test-End Beveling-Flatten Test-Seam/End UT-Length Measuring and Weighing-Coating Marketing-StorageEndsbevelled or plain endSurface ...