Ship Fuel Oil Transfer Pump, Tank Transfer Time & Heating Tool

Transfer Pump • Tank Heating • Viscosity • Line Pressure Loss • Tank Capacity • N-1 Duty • Transfer Readiness

Ship Fuel Oil Transfer Pump, Tank Transfer Time & Heating Tool

Screen fuel-transfer readiness from storage or bunker tanks to settling/service tanks by combining tank inventory, heating time, temperature-dependent viscosity, pump capacity, piping losses and receiving-tank margin. Advanced mode adds multiple transfer pumps, pipe sections, fixed-loss components, N-1 capacity and temperature/flow sensitivity.

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Eight inputs, focused on the transfer decision.Enter the fuel volume, thermal condition and pump capacity. Simple mode assumes the entered heater power is the effective heat delivered to the fuel and that heating is completed before transfer begins.

HeatingEnergy and time to target

TransferEffective pump flow and duration

ScheduleTotal ready-to-complete time

Fuel & Tank Heating

Fuel volume to transferm³.

Fuel densitykg/m³ at the planning condition.

Starting fuel temperature°C.

Target transfer temperature°C. Vessel/OEM-specific.

Fuel specific heatkJ/kg·K.

Effective heating powerkW actually delivered to the fuel after losses.

Transfer Pump

Transfer pump rated flowm³/h.

Operational derate% of rated flow available for this transfer.

Transfer Scenario & Tank Limits

Volume to transferm³.

Source tank current inventorym³ available before transfer.

Heated inventorym³ actually raised to transfer temperature.

Destination tank capacitym³ physical tank capacity.

Destination starting inventorym³.

Maximum planned destination fill% of physical capacity.

Required total operation windowh from heating start through transfer completion.

Target transfer-only timeh. User-entered vessel/OEM/operational target.

Velocity review limitm/s. User-entered piping design screen.

Fuel Thermal & Viscosity Basis

Fuel densitykg/m³.

Specific heatkJ/kg·K.

Starting fuel temperature°C.

Target transfer temperature°C.

Ambient / machinery-space temperature°C used for tank heat loss.

Effective heater / coil inputkW delivered at the tank/heating system.

Tank heated surface aream² exposed through the entered overall U-value.

Overall tank heat-loss U-valueW/m²·K.

Fuel pour point°C from bunker analysis / supplier data.

Required margin above pour point°C, user-entered operating criterion.

Maximum transfer viscositycSt, user-entered pump/system criterion.

Maximum planned tank temperature°C, user/OEM/vessel criterion.

Viscosity reference 1cSt.

Reference 1 temperature°C.

Viscosity reference 2cSt.

Reference 2 temperature°C. Two-point Walther-style fit is used for planning.

Fuel Oil Transfer Pump Register

Normal transfer flow is the sum of pumps marked Duty and Available. N-1 removes the largest available duty-pump flow. Pump differential pressure and motor checks are screens against the calculated system duty point, not a substitute for the actual pump curve.

Use	Pump	Available?	Duty?	Rated m³/h	Derate %	Max viscosity cSt	Max ΔP kPa	Motor kW	Eff. %

Transfer Line Register

Each active line section carries the total modeled transfer flow. Elevation is signed: positive values increase required pump differential pressure, negative values provide static-head credit.

Use	Section	Length m	ID mm	Roughness mm	K losses	Elevation m

Fixed Pressure-Loss Components

Enter measured/vendor pressure drop at its reference flow. The tool scales each component approximately with flow² and applies the entered condition factor.

Use	Component	Reference flow m³/h	Reference ΔP kPa	Condition factor %

Transfer Readiness Checks

Fuel batch / compatibility plan checkedTransfer does not inadvertently mix incompatible or segregated bunker batches. Tank levels and soundings verifiedSource quantity and destination ullage are based on credible measurements. Heating coils / steam or thermal-oil supply readyHeating system is available with condensate/drain arrangements as applicable. Transfer pump and suction strainer readySelected pump, strainer and valves are lined up for the intended transfer. Overflow / high-level precautions checkedDestination tank high-level alarms and transfer stop arrangements are available. Fuel temperature limits checkedTank, coating, pump, seals and vessel procedures permit the entered heating temperature. Transfer line tracing / insulation condition checkedCold line sections are accounted for where residual fuel may lose pumpability. Local transfer procedure / pollution controls checkedScuppers, save-alls, communications and emergency-stop arrangements follow vessel procedures.

Engineering boundary: this is a planning and troubleshooting screen. Actual pump curves, motor current, tank heating-coil ratings, valve line-up, fuel analysis, tank coating limits, class/flag requirements, OEM instructions and the vessel’s fuel-transfer procedures remain controlling. Do not use an estimated viscosity curve to override measured fuel properties or equipment limits.

Technical basis: marine fuel transfer systems commonly move fuel from storage/bunker tanks to settling tanks through transfer pumps and suction strainers, with residual-fuel tanks heated for pumpability. Current engine-maker project guidance also illustrates that pumpability and transfer-tank filling criteria are installation-specific. ISO 8217:2024 defines marine-fuel specifications before onboard storage/treatment, while onboard heating, transfer and treatment remain vessel-system functions.

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