{"data":{"id":"us/30-cfr-250.735","jurisdiction":"us","citation":"30 CFR 250.735","heading":"What associated systems and related equipment must all BOP systems include?","body":"All BOP systems must include the following associated systems and related equipment:\n(a) An accumulator system, as specified in API Standard 53 (incorporated by reference, see § 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;\n(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;\n(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;\n(d) The choke line(s) installed above the bottom well-control ram;\n(e) The kill line must be installed beneath at least one well-control ram, and may be installed below the bottom ram;\n(f) A fill-up line above the uppermost BOP;\n(g) Locking devices for all BOP sealing rams (i.e., blind shear rams, pipe rams and variable bore rams), as follows:\n(1) For subsea BOPs, hydraulic locking devices must be installed on all sealing rams;\n(2) For surface BOPs:\n(i) Remotely-operated locking devices must be installed on blind shear rams no later than April 29, 2019;\n(ii) Manual or remotely-operated locking devices must be installed on pipe rams and variable bore rams; and\n(h) A wellhead assembly with a RWP that exceeds the maximum anticipated wellhead pressure.","path":["Title 30—Mineral Resources","CHAPTER II—BUREAU OF SAFETY AND ENVIRONMENTAL ENFORCEMENT, DEPARTMENT OF THE INTERIOR","SUBCHAPTER B—OFFSHORE","PART 250—OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF","Subpart G—Well Operations and Equipment"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-30.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:25:24Z","sha256":"95d112785e175a121fa9d294689c69bf3e331bcccea23317d934159e91001b27","source_id":"us-cfr","stale":true,"prev":"us/30-cfr-250.734","next":"us/30-cfr-250.736"},"notice":"GroundRules: Original legal text. Not legal advice."}