the scope of this license includes the fo llowing :Casing and Tubing Heads,Chokes,Cross-Over Connectors,Blind and Test Flanges,Tees and Crosses,Threaded Connectors,Top Connectors,Adapter Spools and Spacer Spools,Slip-Type Hangers ,Mandrel-Type Hangers,Gate,Ball,Plug Valves,Check Valves,Check Valves at PSL1 ,PSL2,PSL3,PSL4;Surface Safety Valves at PSL2,PSL3,PSL4;Ring Gaskets;Valve Removal Plugs;Bullplugs;Back Pressure Valves;Pneumatic and Hydraulic Actuators.