USCG Exam PracticeEngine-room safety and hazardous materials
A dry exhaust pipe on a small passenger vessel passes through a combustible bulkhead. According to 46 CFR §182.430, which combination of requirements applies to that installation?
- A. The pipe must be Schedule 80 material and double clamped at the penetration
- ✓ The pipe must be kept clear of and suitably insulated or shielded from combustible material, and supported by noncombustible hangers and blocksCorrect
- C. Noncombustible packing must be used in the penetration gland and the pipe must be welded to the bulkhead
- D. A flexible metallic hose section must be installed within 0.3 meters of the bulkhead penetration to relieve thermal expansion
Why B is correct
46 CFR §182.430(g)(1) requires a dry exhaust pipe passing through a combustible bulkhead to be kept clear of and suitably insulated or shielded from combustible material, and §182.430(g)(2) requires noncombustible hangers and blocks for support. Noncombustible packing in the gland applies to watertight bulkhead penetrations for dry exhaust per §182.430(f), but the question addresses a combustible bulkhead, where §182.430(g) governs.
Cited:46 CFR §182.430