Class-IA, -IB, -IC, or -II liquids or Class-IIIA or -IIIB liquids heated to within 10°C (50°F) of their flash point, or pressurized to 174. 4 kPa (25. 3 psi) or more
NFPA 301 Code for Safety to Life from Fire on Merchant Vessels, 2001 ed. https://www.nfpa.org/Assets/files/AboutTheCodes/30 1/301-A2012-ROP.pdf, (Code: Life Sfty from Fr on Merchant Vssl - Amer) {291 NFC}