{"operation":"document","citation":"49 CFR 179.220-3","title":"-3 Type.","source_type":"regulation","agency":"Pipeline and Hazardous Materials Safety Administration","status":"current","official":true,"published_on":null,"effective_on":"2026-08-18","summary":"(a) Tanks built under these specifications must consist of an inner container, a support system for the inner container, and an outer shell.\n\n(b) The inner container must be a fusion welded tank of circular cross section with formed heads designed convex outward and must have a manway on top of the ","machine_formats":{"json":"https://regulus.evalyn.ai/document/49-cfr-179-220-3.json","markdown":"https://regulus.evalyn.ai/document/49-cfr-179-220-3.md"},"app_url":"https://regulus.evalyn.ai/document/49-cfr-179-220-3","source_url":"https://www.ecfr.gov/on/2026-08-18/title-49/section-179.220-3","body":"(a) Tanks built under these specifications must consist of an inner container, a support system for the inner container, and an outer shell.\n\n(b) The inner container must be a fusion welded tank of circular cross section with formed heads designed convex outward and must have a manway on top of the tank as prescribed herein. When the inner container is divided into compartments, each compartment must be considered a separate container.\n\n(c) The outer shell must be a fusion welded tank with formed heads designed convex outward.\n\n[Amdt. 179-9, 36 FR 21340, Nov. 6, 1971]","truncated":false,"body_characters":574}