gas and oil line pipe Normal OD: 42.3-244.5mm Wall thickness: ... Stardard: GB/T9711.1 gas and line pipePlace of originTianjin China(Mainland)Applicationoil pipeWelding line typeERWMinimum order quantity20 tonPriceFOB USD 700-800 ... test, charpy impact test,metallographic examinationFinal product testhydraulic test,on-line and off- line ultrasonic test, tensile test,yeild strength,elogation hardness test ...