Design of MPTs.

An MPT must be designed— (a) In accordance with Section VIII of the ASME BPVC (incorporated by reference; see § 64.2) and this subpart; (b) With a maximum gross weight of 55,000 pounds; (c) To hold a liquid cargo that has a vapor pressure of 43 pounds per square inch absolute (psia) or less at a temperature of 122 °F; (d) With a minimum service temperature of 0 °F or higher; (e) With a maximum allowable working pressure of not less than 20 pounds per square inch gauge (psig) but not more than 48 psig; and (f) To withstand dynamic loading conditions applied simultaneously. [CGD 84-043, 55 FR 37410, Sept. 11, 1990; 55 FR 40755, Oct. 4, 1990; USCG-2020-0634, 89 FR 50199, June 12, 2024]