{"operation":"document","citation":"49 CFR 179.100-9","title":"-9 Welding.","source_type":"regulation","agency":"Pipeline and Hazardous Materials Safety Administration","status":"current","official":true,"published_on":null,"effective_on":"2026-08-18","summary":"(a) All joints shall be fusion-welded in compliance with the requirements of AAR Specifications for Tank Cars, appendix W (IBR, see § 171.7 of this subchapter). Welding procedures, welders and fabricators shall be approved.\n\n(b) [Reserved]\n\n[29 FR 18995, Dec. 29, 1964, as amended at 65 FR 58632, Sep","machine_formats":{"json":"https://regulus.evalyn.ai/document/49-cfr-179-100-9.json","markdown":"https://regulus.evalyn.ai/document/49-cfr-179-100-9.md"},"app_url":"https://regulus.evalyn.ai/document/49-cfr-179-100-9","source_url":"https://www.ecfr.gov/on/2026-08-18/title-49/section-179.100-9","body":"(a) All joints shall be fusion-welded in compliance with the requirements of AAR Specifications for Tank Cars, appendix W (IBR, see § 171.7 of this subchapter). Welding procedures, welders and fabricators shall be approved.\n\n(b) [Reserved]\n\n[29 FR 18995, Dec. 29, 1964, as amended at 65 FR 58632, Sept. 29, 2000; 68 FR 75759, Dec. 31, 2003]","truncated":false,"body_characters":340}