Spacer spools have end connectors of the same size, rated working pressure, and design.
Blind Flange, have no through-bore, which may or may not include a test and gauge connector port, used to close off a flanged or studded end or outlet connector.
Double studded Flange, a combination of flanges of same sizes and pressure ratings.
Weldneck Flange, have a neck on the side opposite the sealing face terminating in a weld preparation.
Companion Flange, a pipe flange threaded internally to receive a pipe length and drilled so it may be bolted to another like flange
Tees, Pressure-containing part with three end connectors; two openings opposite one another form the run portion of the tee, and one opening is at 90° to the line of the run.
Crosses, pressure-containing part with a minimum of four end connectors.
Double Studded Adapter Flange, a combination of flanges of different sizes and pressure ratings.
Adapter spools have end connectors of different sizes, pressure ratings, and/or designs.
Choke and Kill manifold system, An assembly of valves, chokes, gauges, and lines used to control the rate of flow and pressure from the well when the BOPs are closed.
Hydraulic Accumulators, a pressure storage reservoir in which a non-compressible hydraulic fluid is held under pressure that is applied by an external source. The external source can be a spring, a raised weight, or a compressed gas.
