... tubing spool gate valve flange 3. base on API 6A standard Oil drilling equipment parts including casing head ... valve flange All parts manufature according to API 6A standard. MaterialCerfitcationDelivery tiemPackingPaymentDD/EEAPI 6A / ISO4~8weeksBy wooden caseT/T, L ... base plates, secondary seals, FC type slab gate valves, M type expanding gate valves, , flanges, adapter spools, spacer spools, , ...