GroundRules
46 CFR 64.59: Spring loaded pressure relief valve.
Where this section sits in the code
- Title 46—Shipping
- CHAPTER I—COAST GUARD, DEPARTMENT OF HOMELAND SECURITY
- SUBCHAPTER F—MARINE ENGINEERING
- PART 64—MARINE PORTABLE TANKS AND CARGO HANDLING SYSTEMS
- Subpart C—Pressure Relief Devices and Vacuum Relief Devices for MPTs
A spring loaded pressure relief valve must—
(a) Be set at a nominal pressure of 125 percent of the maximum allowable working pressure;
(b) Have a minimum normal venting capacity that is sufficient to prevent the tank pressure from exceeding 137.5 percent of the maximum allowable working pressure;
(c) Close after discharge of a pressure not lower than 115 percent of the maximum allowable working pressure; and
(d) If closed, remain closed at any pressure less than 115 percent of the maximum allowable working pressure.
Collected 2026-08-27T02:26:22Z. Source file · JSON