{"operation":"document","citation":"49 CFR 178.255-9","title":"-9 Compartments.","source_type":"regulation","agency":"Pipeline and Hazardous Materials Safety Administration","status":"current","official":true,"published_on":null,"effective_on":"2026-08-18","summary":"(a) When the interior of the tank is divided into compartments, each compartment shall be designed, constructed and tested as a separate tank. Thickness of shell and compartment heads shall be determined on the basis of total tank capacity.\n\n(b) [Reserved]","machine_formats":{"json":"https://regulus.evalyn.ai/document/49-cfr-178-255-9.json","markdown":"https://regulus.evalyn.ai/document/49-cfr-178-255-9.md"},"app_url":"https://regulus.evalyn.ai/document/49-cfr-178-255-9","source_url":"https://www.ecfr.gov/on/2026-08-18/title-49/section-178.255-9","body":"(a) When the interior of the tank is divided into compartments, each compartment shall be designed, constructed and tested as a separate tank. Thickness of shell and compartment heads shall be determined on the basis of total tank capacity.\n\n(b) [Reserved]","truncated":false,"body_characters":256}