{"operation":"document","citation":"49 CFR 179.300-10","title":"-10 Postweld heat treatment.","source_type":"regulation","agency":"Pipeline and Hazardous Materials Safety Administration","status":"current","official":true,"published_on":null,"effective_on":"2026-08-18","summary":"After welding is complete, steel tanks and all attachments welded thereto, must be postweld heat treated as a unit in compliance with the requirements of AAR Specifications for Tank Cars, appendix W (IBR, see § 171.7 of this subchapter).\n\n[68 FR 75763, Dec. 31, 2003]","machine_formats":{"json":"https://regulus.evalyn.ai/document/49-cfr-179-300-10.json","markdown":"https://regulus.evalyn.ai/document/49-cfr-179-300-10.md"},"app_url":"https://regulus.evalyn.ai/document/49-cfr-179-300-10","source_url":"https://www.ecfr.gov/on/2026-08-18/title-49/section-179.300-10","body":"After welding is complete, steel tanks and all attachments welded thereto, must be postweld heat treated as a unit in compliance with the requirements of AAR Specifications for Tank Cars, appendix W (IBR, see § 171.7 of this subchapter).\n\n[68 FR 75763, Dec. 31, 2003]","truncated":false,"body_characters":267}