Tankerman · Cargo Properties — Grades
Under the Coast Guard grade system, Grades A, B, and C cargoes are classified as flammable because their flash point is:
- ABelow 80°F (with grades distinguished by vapor pressure)✓ Correct
- BAt or above 150°F
- CAbove 200°F
- DExactly 100°F
Explanation
Grades A/B/C are flammable liquids with flash points below 80°F, separated by Reid vapor pressure (A highest). Grades D (flash 80–150°F) and E (flash at or above 150°F) are combustible liquids. The grade drives handling and equipment requirements.
Authority: 46 CFR 30.10
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