§ 64.65 - Vacuum relief device.

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- 99-25058. Final rule. 99-25058. Technical Amendments; Organizational Changes; Miscellaneous Editorial Changes and Conforming Amendments
- 97-25573. Final rule. 97-25573. Technical Amendments; Organizational Changes; Miscellaneous Editorial Changes and Conforming Amendments

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§ 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]

                    
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§ 64.65 - Vacuum relief device.

§ 64.65 Vacuum relief device.