1. Regulations
  2. title 46
  3. chapter I-i1
  4. part 64
  5. subpart C
  6. § 64.65

View all text of Subpart C [§ 64.57 - § 64.71]

§ 64.65 - Vacuum relief device.

(a) Each MPT that is designed for an external pressure of less than 7.5 psig must have a vacuum relief device.

(b) A vacuum relief device for an MPT must—

(1) Open at an external pressure of not less than 3 psig; and

(2) Have an opening with a cross-section of 0.44 square inch or more.

[CGD 84-043, 55 FR 37410, Sept. 11, 1990]

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 64.65