{"data":{"id":"us/30-cfr-250.431","jurisdiction":"us","citation":"30 CFR 250.431","heading":"What are the diverter design and installation requirements?","body":"You must design and install your diverter system to:\n(a) Use diverter spool outlets and diverter lines that have a nominal diameter of at least 10 inches for surface wellhead configurations and at least 12 inches for floating drilling operations;\n(b) Use dual diverter lines arranged to provide for downwind diversion capability;\n(c) Use at least two diverter control stations. One station must be on the drilling floor. The other station must be in a readily accessible location away from the drilling floor;\n(d) Use only remote-controlled valves in the diverter lines. All valves in the diverter system must be full-opening. You may not install manual or butterfly valves in any part of the diverter system;\n(e) Minimize the number of turns (only one 90-degree turn allowed for each line for bottom-founded drilling units) in the diverter lines, maximize the radius of curvature of turns, and target all right angles and sharp turns;\n(f) Anchor and support the entire diverter system to prevent whipping and vibration; and\n(g) Protect all diverter-control instruments and lines from possible damage by thrown or falling objects.","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 D—Oil and Gas Drilling Operations"],"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":"9c1c2ad7dad48545d3924a9fa92107f74c8863c42e679b46081d07a2de91096c","source_id":"us-cfr","stale":true,"prev":"us/30-cfr-250.430","next":"us/30-cfr-250.432"},"notice":"GroundRules: Original legal text. Not legal advice."}