USCG Exam PracticeEngine-room safety and hazardous materials
Under 46 CFR §28.380, when insulation is used in a machinery space where flammable vapors may be present, what additional requirement applies to that insulation?
- A. The insulation must be noncombustible in all cases
- ✓ A vapor barrier covering the insulation must be providedCorrect
- C. The insulation must be removed and replaced with ceramic lagging
- D. The insulation must be tested and listed by an independent laboratory
Why B is correct
46 CFR §28.380(f) requires that where insulation of any type is used in spaces where flammable and combustible liquids or vapors are present, such as machinery spaces and paint lockers, a vapor barrier covering the insulation must be provided. This applies regardless of whether the insulation itself is combustible or noncombustible.
Cited:46 CFR §28.380