49 C.F.R. § 178.255-2 Material.
Title 49 - Transportation
(a) Material used in the tank must be steel of good weldable quality and conform with the requirements in Sections V, VIII, and IX of the ASME Code (IBR, see §171.7 of this subchapter). (b) The minimum thickness of metal, exclusive of lining material, for shell and heads of tanks shall be as follows: [29 FR 18972, Dec. 29, 1964. Redesignated at 32 FR 5606, Apr. 5, 1967, and amended by Amdt. 178–7, 34 FR 18250, Nov. 14, 1969; 68 FR 75750, Dec. 31, 2003]
Title 49: Transportation
PART 178—SPECIFICATIONS FOR PACKAGINGS
Subpart H—Specifications for Portable Tanks
§ 178.255-2 Material.
------------------------------------------------------------------------ Minimum Tank capacity thickness (inch)------------------------------------------------------------------------Not more than 1,200 gallons................................. \1/4\Over 1,200 to 1,800 gallons................................. \5/16\Over 1,800 gallons.......................................... \3/8\------------------------------------------------------------------------
