{"data":{"id":"us/49-cfr-179.201-4","jurisdiction":"us","citation":"49 CFR 179.201-4","heading":"-4 Material.","body":"All fittings, tubes, and castings and all projections and their closures, except for protective housing, must also meet the requirements specified in ASTM A 262 (IBR, see § 171.7 of this subchapter), except that when preparing the specimen for testing the carburized surface may be finished by grinding or machining.","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 D—Specifications for Non-Pressure Tank Car Tanks (Classes DOT-111AW, 115AW, and 117AW)"],"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":"fb5778f98d8cd9bf885affcb6afd968557f23baa067feba9f6c196a27c83e728","source_id":"us-cfr","stale":true,"prev":"us/49-cfr-179.201-3","next":"us/49-cfr-179.201-5"},"notice":"GroundRules: Original legal text. Not legal advice."}