... with seamless steel tubes, and to transport liquid, gas, oil etc. Quality Standard: ASTM A106: Standard Specification for Seamless ... Seamless Steel Tubes For Elevated Temperatures API 5L: Line Pipe Steel Grade: Steel Grade:API 5L: GR B, X42, X46, X56, X60, X65, X70 ... Quenched and Tempered Surface: Hot dip galvanized, Black oil, Bare, Varnish coating, Antirust oil, Coal Tar Epoxy, Fusion Bond Epoxy, 3 ...