GroundRules
49 CFR 179.400-11: -11 Welding.
Where this section sits in the code
- 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 F—Specification for Cryogenic Liquid Tank Car Tanks and Seamless Steel Tanks (Classes DOT-113 and 107A)
(a) Except for closure of openings and a maximum of two circumferential closing joints in the cylindrical portion of the outer jacket, each joint of an inner tank and the outer jacket must be a fusion double welded butt joint.
(b) The closure for openings and the circumferential closing joints in the cylindrical portion of the outer jacket, including head to shell joints, may be a single welded butt joint using a backing strip on the inside of the joint.
(c) Each joint must be welded in accordance with the requirements of AAR Specifications for Tank Cars, appendix W (IBR, see § 171.7 of this subchapter).
(d) Each welding procedure, welder, and fabricator must be approved.
Collected 2026-08-27T02:26:34Z. Source file · JSON