View all text of Subpart D [§ 179.200 - § 179.221-1]
§ 179.220-14 - Openings in the tanks.
Openings in the inner container and the outer shell must be reinforced in compliance with AAR Specifications for Tank Cars, appendix E (IBR, see § 171.7 of this subchapter). In determining the required reinforcement area for openings in the outer shell, t shall be one-fourth inch.