46 C.F.R. § 153.370 Minimum relief valve setting for ambient temperature cargo tanks.
Title 46 - Shipping
The relief valve setting for a containment system that carries a cargo at ambient temperature must at least equal the cargo's vapor pressure at 46 °C (approx. 115 °F). [CGD 81–078, 50 FR 21173, May 22, 1985]
Title 46: Shipping
PART 153—SHIPS CARRYING BULK LIQUID, LIQUEFIED GAS, OR COMPRESSED GAS HAZARDOUS MATERIALS
Subpart B—Design and Equipment
Cargo Venting Systems
§ 153.370 Minimum relief valve setting for ambient temperature cargo tanks.

