{"data":{"id":"us/49-cfr-179.100-9","jurisdiction":"us","citation":"49 CFR 179.100-9","heading":"-9 Welding.","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(b) [Reserved]","path":["Title 49—Transportation","Subtitle B—Other Regulations Relating to Transportation","CHAPTER I—PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION","SUBCHAPTER C—HAZARDOUS MATERIALS REGULATIONS","PART 179—SPECIFICATIONS FOR TANK CARS","Subpart C—Specifications for Pressure Tank Car Tanks (Classes DOT-105, 109, 112, 114 and 120)"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-49.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:34Z","sha256":"6e744c0e96438ab6046bec0c4c1ae5ae86c8ae6141977ce3af38b7527bae03ab","source_id":"us-cfr","stale":true,"prev":"us/49-cfr-179.100-8","next":"us/49-cfr-179.100-10"},"notice":"GroundRules: Original legal text. Not legal advice."}