Piping Systems and Components
What this domain tests
This domain tests system-level knowledge: bilge, ballast, fuel oil, lube oil, cooling, fire main, compressed air, and steam. The exam asks you to identify components, understand system separation, and recognize where a component is wrongly applied.
Core rules
- The bilge system must be independent of the ballast system to prevent cross-contamination and unintended flooding.
- Bilge suctions require accessible strainers and non-return arrangements where required; a blocked strainer can render a compartment’s bilge suction useless.
- Fire-main components must be rated for fire service, and hydrant pressure must be maintained by the fire pump.
- Fuel-oil lines need isolation valves, drains, and protection against leakage onto hot surfaces.
- Pumps, strainers, filters, gauges, safety valves, and expansion joints must be selected for the fluid and design conditions.
Worked example
A bilge suction is added in a cargo hold. Confirm the line is independent of ballast, fit an accessible strainer at the low point, include a non-return valve if the specification requires it, and check that the suction can be drained. Trace the line to the bilge pump and confirm no cross-connection exists. Reasoning: the system must remove water from the hold without creating a path for ballast water or flooding from another compartment.
Traps
- Cross-connecting bilge and ballast because the piping is convenient.
- Installing a strainer in an inaccessible location.
- Using a non-fire-rated valve in the fire main.
- Omitting a safety valve or expansion provision on a positive-displacement pump discharge.