Section 250.735 - What associated systems and related equipment must all BOP systems include?All BOP systems must include the following associated systems and related equipment:
(a) An accumulator system (as specified in API Standard 53, incorporated by reference in § 250.198 ). Your accumulator system must have the fluid volume capacity and appropriate pre-charge pressures in accordance with API Standard 53. If you supply the accumulator regulators by rig air and do not have a secondary source of pneumatic supply, you must equip the regulators with manual overrides or other devices to ensure capability of hydraulic operations if rig air is lost;(b) An automatic backup to the primary accumulator-charging system. The power source must be independent from the power source for the primary accumulator-charging system. The independent power source must possess sufficient capability to close and hold closed all BOP components under MASP conditions as defined for the operation;(c) At least two full BOP control stations. One station must be on the rig floor. You must locate the other station in a readily accessible location away from the rig floor;(d) The choke line(s) installed above the bottom well-control ram;(e) The kill line must be installed beneath at least one well-control ram, and may be installed below the bottom ram;(f) A fill-up line above the uppermost BOP;(g) Locking devices for all BOP sealing rams (i.e., blind shear rams, pipe rams and variable bore rams), as follows:(1) For subsea BOPs, hydraulic locking devices must be installed on all sealing rams;(2) For surface BOPs: (i) Remotely-operated locking devices must be installed on blind shear rams no later than April 29, 2019;(ii) Manual or remotely-operated locking devices must be installed on pipe rams and variable bore rams; and(h) A wellhead assembly with a RWP that exceeds the maximum anticipated wellhead pressure.81 FR 26022, Apr. 29, 2016, as amended at 84 FR 21981, May 15, 2019 81 FR 26022, 7/28/2016; 84 FR 21981, 7/15/2019