Booster Pump and Heater Series Discharge Checklist

This template covers the pre-discharge checks for a booster pump and heater arranged in series during refrigerated-to-pressurised cargo discharge. It focuses on seawater flow, slow cool-down, outlet temperature control, and readiness for transfer. Use it as a task checklist before opening the discharge path, not as a general cargo handling log.

Run it before each discharge evolution that depends on the booster pump and heater train, especially when cargo must be warmed or pressurised before transfer. It is also useful after maintenance, after a long idle period, or whenever the discharge route, cargo condition, or seawater supply changes. If the operation is continuous and unchanged, repeat it at the start of each shift or transfer window.

The DRI is usually the cargo officer, chief officer, or another designated operations lead who can verify the system and authorize the next step. Deck and engine personnel may each complete their own checklist items where responsibilities split across systems. Keep the assignment clear so one person is accountable for closing the loop, even if several people contribute.

It can be adapted for both LNG and LPG discharge operations where a booster pump and heater are used in series. The exact temperature limits, valve sequence, and verification steps should match the cargo, vessel procedures, and terminal requirements. If your vessel uses a different discharge arrangement, customize the items rather than forcing this template to fit.

Common failures include starting discharge before seawater flow is established, skipping the slow cool-down step, and missing an outlet temperature check before transfer. Another frequent issue is treating the heater as a standalone item instead of verifying the full series path from pump to outlet. This template reduces those gaps by making each step independently verifiable.

Add the vessel-specific valve names, alarm points, temperature bands, and any terminal interface checks that apply to your cargo system. You can also add photo or reading attachments for critical verification steps and remove items that are not relevant to your piping layout. Keep each checklist item atomic so the crew can answer yes, no, or N/A without ambiguity.

Yes, it pairs well with pre-transfer cargo checklists, engine room readiness checks, permit-to-work records, and shift handover tasks. Many teams link it to a discharge plan, maintenance sign-off, or incident follow-up workflow so the verification step is visible in one place. If your process uses Kanban, keep it in the active work lane until all blocking items are cleared.

A verbal briefing is easy to skip, forget, or interpret differently under time pressure. This checklist creates a repeatable record of the exact checks completed, who verified them, and which items blocked discharge. That makes it easier to spot drift, support handover, and avoid starting transfer with an incomplete setup.