gas and oil line pipe Normal OD: 42.3-244.5mm ... 14mmMaterialX70, X65, X42, L45StandardGB/T9711.1Length5m-12mUsageline pipe, casing and tubing, fluid pipe, water delivery, heating pipe, power pipe ... impact test,metallographic examinationFinal product testhydraulic test,on-line and off- line ultrasonic test, tensile test,yeild strength, ... ;3.according to the customers' requirement gas and oil line pipe