---
kind: "section"
citation: "46 C.F.R. § 64.19"
title: "46"
number: "64.19"
heading: "External pressure."
url: "https://uscodex.org/cfr/46/64.19"
---

# §64.19. External pressure.

- (a) A tank without a vacuum breaker must be designed to withstand an external pressure of 7 1/2 psig or more.
- (b) A tank with a vacuum breaker must be designed to withstand an external pressure of 3 psig or more.

## Notes

### 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.