直径: 21.3-609.6 mm (1/2-24inch)
壁厚: Sch20-sch140 (1.73-36.5mm)
标准: API5L, API5CT, ASTM A106/A53
钢级: A, B, X42, X46, X52, X56, X60, X65, X70,J55, K55, N80,P110,16Mn, ST37, ST52