---
kind: "section"
citation: "46 C.F.R. § 64.11"
title: "46"
number: "64.11"
heading: "Design of MPTs."
url: "https://uscodex.org/cfr/46/64.11"
---

# §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](/cfr/46/64.2.md)) 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.**

## Notes

### Amendments

[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

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

Source: CGD 73-172, 39 FR 22950, June 25, 1974, unless otherwise noted.

### Amendments

[CGD 84-043, 55 FR 37410, Sept. 11, 1990; 55 FR 40755, Oct. 4, 1990; USCG-2020-0634, 89 FR 50199, June 12, 2024]