gas and oil line pipe Normal OD: 42.3 ... X65, X42, L45StandardGB/T9711.1Length5m-12mUsageline pipe, casing and tubing, fluid pipe, water delivery, heating pipe, power ... -Uncoiling-Strip leveling-End Cutting-End Shearing and welding-Accumlator-Forming-Telepathy Welding-Seam Heat ... test,metallographic examinationFinal product testhydraulic test,on-line and off- line ultrasonic test, tensile test,yeild ...