§179.400-11. Welding.
49 C.F.R. § 179.400-11
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.
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.
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).
Each welding procedure, welder, and fabricator must be approved.
Notes, amendments, and revision history
Amendments
[Amdt. 179-32, 48 FR 27708, June 16, 1983, as amended at 68 FR 75763, Dec. 31, 2003]
Source
Source: Amdt. 179-32, 48 FR 27708, June 16, 1983, unless otherwise noted.
Authority
Authority: 49 U.S.C. 5101-5128; 49 CFR 1.81 and 1.97.
Source
Source: 29 FR 18995, Dec. 29, 1964, unless otherwise noted. Redesignated at 32 FR 5606, Apr. 5, 1967.
Amendments
[Amdt. 179-32, 48 FR 27708, June 16, 1983, as amended at 68 FR 75763, Dec. 31, 2003]