Methanol Bunkering Transfer Rate, Hose Pressure Drop, ESD/ERS & Bunkering Time Tool

Methanol Quantity, Transfer Rate, Darcy Pressure Drop, Hose MWP, Vapor Return, High-High Buffer, ESD Shutdown & ERS Spill

Methanol Bunkering Transfer Rate, Hose Pressure Drop, ESD/ERS & Bunkering Time Tool

Turn a methanol bunker quantity into the transfer-system numbers that actually control the operation. Calculate tank receiving capacity, safe bulk transfer rate, per-hose flow and velocity, Reynolds number and Darcy pressure loss, pump discharge pressure and kW, vapor-return capacity, hose pressure-rating margin, high-high shutdown ullage, post-ESD transfer volume, ERS exposed spill volume and pool area, topping time, drain / purge time, total berth-side bunkering time, and the component that limits the transfer rate.

Bunker Quantity & Receiving Tank

The requested bunker quantity is checked against the receiving tank group's target filling limit before hydraulic calculations are run.

Requested methanol bunker quantity tonnes.

Methanol density kg/m³ at the representative bunkering temperature.

Dynamic viscosity mPa·s.

Receiving tank group gross volume m³.

Starting tank filling % gross tank volume.

Planned end filling % gross tank volume.

High-high automatic shutdown level % gross tank volume.

Maximum permitted filling limit % gross tank volume used for post-ESD ullage screen.

Transfer-Rate Limits

Planned / requested bulk transfer rate m³/h total liquid rate.

Delivering facility / bunker vessel maximum m³/h.

Receiving ship maximum bunker rate m³/h from approved ship design / operating procedure.

Meter / skid maximum rate m³/h.

Simultaneous liquid connections

Maximum rate per hose / loading arm m³/h each.

Maximum preferred liquid velocity m/s, project / hose / erosion / static-control criterion.

Available pump discharge pressure bar(g) at the relevant flow.

Pump hydraulic efficiency %.

Receiving tank / vapor-space pressure bar(g).

Manifold / valve backpressure allowance bar beyond explicit route K values.

Simple Transfer Route

Common supply-line length m carrying total flow.

Common supply-line internal diameter mm.

Common-line roughness mm.

Common-line minor-loss K

Hose / loading-arm length per connection m.

Hose / arm internal diameter mm.

Hose effective roughness mm screening value.

Hose / connection minor-loss K

Total receiving-manifold elevation above pump m. Negative value reduces static head.

Advanced Methanol Transfer Route Register

Build one representative hydraulic path from delivering pump to receiving tank. Flow share lets common segments carry 100% of total flow while one branch of a two-hose system can carry 50%.

Segment	Length m	ID mm	Roughness mm	Minor K	Elevation m	Flow share %

Hose, Loading Arm & Pressure Envelope

Hose specified maximum working pressure bar(g). IMO interim guidance for ship-carried methanol hoses states specified MWP should not be less than 1 MPa gauge.

Hose hydrostatic test pressure bar(g).

Hose prototype burst pressure bar(g).

Receiving manifold / transfer-system MAWP bar(g).

Pressure-surge allowance % above steady required pump discharge.

Drip tray / dedicated spill collection capacity litres.

Vapor Return / Tank Displacement

Required vapor-flow margin % of incoming liquid volumetric rate for screening.

Existing vapor-return internal diameter mm.

Maximum vapor-line velocity m/s project / OEM criterion.

ESD Shutdown & High-High Ullage

Detection / logic / communication delay before shutdown starts s at full flow.

Pump trip / flow rundown delay s equivalent full-flow delay.

Remote shutdown-valve closure time s.

Average flow fraction during valve closure %. 50% approximates linear flow decay during closure.

ERS / Break-Away Coupling Spill Screen

Liquid length trapped / exposed between isolation points m of hose / arm whose inventory is relevant at disconnection.

ERS / vulnerable-line internal diameter mm.

Dry-break / ERC retained-liquid effectiveness % of trapped inventory retained / captured.

Physical ERS separation time after ESD signal s.

Residual flow factor if separation precedes isolation % of bunker flow used during the remaining isolation interval.

Assumed average uncontained spill depth mm for approximate pool-area visualization only.

Bunkering Time & Topping

Pre-transfer checks / connection time minutes.

Ramp-up time minutes added to operation.

Volume handled in topping mode % of planned bunker volume.

Topping transfer rate % of safe bulk rate.

Post-transfer drain / inert / gas-free / disconnect time minutes.

Commercial Inputs

Bunker / terminal time value Selected currency/hour.

Transfer-system / ERS / metering CAPEX

ISO 22120 / IMO Bunkering Readiness

Transfer-system compatibility confirmed Hose / arm, couplings, seals, meters, pumps and materials are approved for methanol service. Dry disconnect + break-away / ERC verified The bunkering connection and emergency release arrangement match the approved transfer-system philosophy. Ship-shore ESD link tested Automatic and manual ESD communication, remote shutdown valve and control-station functions have been demonstrated. High / high-high level shutdown tested Independent high-high sensor and automatic shutoff prevent the receiving tank from becoming liquid-full. Drain / inert / gas-free procedure confirmed Bunkering lines and hoses can be safely drained and handled after transfer. Risk assessment, checklist & trained personnel ready Safety zone, communications, PPE, firefighting, emergency response and bunker checklist are approved for the operation.

Engineering / bunkering screening only: This tool is not an ISO 22120 conformity assessment, class-approved transfer-system calculation, HAZID / HAZOP, pump curve, transient surge analysis, CFD dispersion model, hazardous-area study, ERS certification, ESD functional-safety analysis, tank filling-limit approval or port authorization. Methanol bunkering limits depend on the exact vessel, terminal, bunker supplier, hose / arm maker, tank vent system, pressure surge, local regulation, class, flag and approved operating procedure.

2026 reference basis: ISO 22120:2026, Ships and marine technology - Specification for bunkering of methanol fuelled vessels, covers transfer systems, operational procedures, risk assessment, safety protection and personnel training. IMO MSC.1/Circ.1621 requires methanol bunkering arrangements to address spill management, methanol-compatible hoses, dry-disconnect / safety break-away connections, line draining, inerting / gas freeing, ship-shore ESD communication, remote shutdown valves, tank high / high-high level protection and safe bunkering control. For ship-carried bunker hoses, MSC.1/Circ.1621 specifies a maximum working pressure of at least 1 MPa gauge, hydrostatic testing of new hose lengths at not less than 1.5 times MWP subject to the burst-pressure limit, and prototype burst pressure of at least five times MWP. Verify the purchased ISO standard, current IMO guidance, class rules, port requirements and equipment certificates for the actual operation. ISO 22120:2026 · IMO Future Fuels Safety Guidelines

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