Pressure-containing closer for a female threaded and or outlet connection which may have an internal counter bore and/or test port.
The Material & Design of Bull Plugs are determined with the working pressure and external load capacity. Bull Plug materials, as a minimum meet the requirement of PSL 3 material in

Valve removal plug body materials as a minimum meet the requirement of PSL3. Material is in accordance with material designation 60K for 13.8 MPa to 69 MPa working pressure & 75k for 103.5 MPa to 138 MPa working pressure The material requirement of Valve removal plugs shall be for sour service (DD, FF or HH). Valve removal