Sections3Subpart B—Specifications for Inside Containers, and Linings37Subpart C—Specifications for Cylinders27Subpart H—Specifications for Portable Tanks22Subpart J—Specifications for Containers for Motor Vehicle Transportation79Subpart K—Specifications for Packagings for Class 7 (Radioactive) Materials1Subpart L—Non-bulk Performance-Oriented Packaging Standards23Subpart M—Testing of Non-bulk Packagings and Packages10Subpart N—IBC Performance-Oriented Standards10Subpart O—Testing of IBCs14Subpart P—Large Packagings Standards9Subpart Q—Testing of Large Packagings8Subpart R—Flexible Bulk Container Standards5Subpart S—Testing of Flexible Bulk Containers9
Regulationcurrent
49 CFR 178.338-5
-5 Stiffening rings.
Current as of 2026-08-18 Government source
eCFR editorial compilationAuthoritative but unofficial
(a)A tank is not required to be provided with stiffening rings, except as prescribed in Section VIII of the ASME Code (IBR, see § 171.7 of this subchapter).#
(b)If a jacket is evacuated, it must be constructed in compliance with § 178.338-1(f). Stiffening rings may be used to meet these requirements.#
