{"operation":"document","citation":"49 CFR 178.338-6","title":"-6 Manholes.","source_type":"regulation","agency":"Pipeline and Hazardous Materials Safety Administration","status":"current","official":true,"published_on":null,"effective_on":"2026-08-18","summary":"(a) Each tank in oxygen service must be provided with a manhole as prescribed in Section VIII of the ASME Code (IBR, see § 171.7 of this subchapter).\n\n(b) Each tank having a manhole must be provided with a means of entrance and exit through the jacket, or the jacket must be marked to indicate the ma","machine_formats":{"json":"https://regulus.evalyn.ai/document/49-cfr-178-338-6.json","markdown":"https://regulus.evalyn.ai/document/49-cfr-178-338-6.md"},"app_url":"https://regulus.evalyn.ai/document/49-cfr-178-338-6","source_url":"https://www.ecfr.gov/on/2026-08-18/title-49/section-178.338-6","body":"(a) Each tank in oxygen service must be provided with a manhole as prescribed in Section VIII of the ASME Code (IBR, see § 171.7 of this subchapter).\n\n(b) Each tank having a manhole must be provided with a means of entrance and exit through the jacket, or the jacket must be marked to indicate the manway location on the tank.\n\n(c) A manhole with a bolted closure may not be located on the front head of the tank.\n\n[Amdt. 178-77, 48 FR 27704, June 16, 1983, as amended at 49 FR 24316, June 12, 1984; 68 FR 75754, Dec. 31, 2003]","truncated":false,"body_characters":527}