{"data":{"id":"us/49-cfr-179.300-10","jurisdiction":"us","citation":"49 CFR 179.300-10","heading":"-10 Postweld heat treatment.","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).","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 E—Specifications for Multi-Unit Tank Car Tanks (Classes DOT-106A and 110AW)"],"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":"7fa3ce969cecb9f4c791646c7de1ca00273a2904af51f90001a0e2f28a918ffd","source_id":"us-cfr","stale":true,"prev":"us/49-cfr-179.300-9","next":"us/49-cfr-179.300-12"},"notice":"GroundRules: Original legal text. Not legal advice."}