1): Design & manufacture: API602;ANSI B16.34 2): Construction: B.C or Y type 3): Gasket: S.S+Graghite 4): Screw gasket: Copper sheet 5): Socket welding and threaded ends 6): Socket welding dimension: ANSI B16.11; JB/T1751 7): Screw end dimension: ANSI B1.20(NPT); GB/T7306-87 8): Inspect and test: API598 9): Body material: A105, LF2, F5, F11, F22, F304, F304L, F316, F316L