§64.19. External pressure.
46 C.F.R. § 64.19
A tank without a vacuum breaker must be designed to withstand an external pressure of 7 1/2 psig or more.
A tank with a vacuum breaker must be designed to withstand an external pressure of 3 psig or more.
Notes, amendments, and revision history
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.