C.F.R. » Title 49 » CHAPTER I—PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION › SUBCHAPTER C—HAZARDOUS MATERIALS REGULATIONS › PART 178—SPECIFICATIONS FOR PACKAGINGS › Subpart H—Specifications for Portable Tanks

49 C.F.R. § 178.255-2

Material

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(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:

Tank capacityMinimum thickness (inch)
Not more than 1,200 gallons1⁄4
Over 1,200 to 1,800 gallons5⁄16
Over 1,800 gallons3⁄8
[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]