View all text of Subpart E [§ 179.300 - § 179.302]
§ 179.300-10 - Postweld heat treatment.
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).