Regulations last checked for updates: Oct 18, 2024

Title 46 - Shipping last revised: Oct 15, 2024
§ 64.11 - 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]
authority: 46 U.S.C. 3306,3703; 49 U.S.C. App. 1804; Department of Homeland Security Delegation No. 00170.1, Revision No. 01.3
source: CGD 73-172, 39 FR 22950, June 25, 1974, unless otherwise noted.
cite as: 46 CFR 64.11