View all text of Subpart H [§ 178.251—178.253 - § 178.277]
§ 178.255-2 - Material.
(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 capacity | Minimum 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 |
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