SOLAS Fire Pump Capacity, Farthest Hydrant Pressure, Nozzle Flow, Fire-Main Loss, Emergency Pump & NPSH

Ship Fire Pump, Fire Main, Hydrant Pressure & Emergency Pump Capacity Tool

Turn statutory fire-pump capacity and actual pipe geometry into a hydraulic fire-main screen. Check minimum pump count and per-pump capacity, farthest-hydrant residual pressure, nozzle jet flow, main-pipe velocity, pump discharge pressure and motor kW, one-pump-out capacity, emergency fire-pump flow and pressure, suction / NPSH margin, and the effect of pipe diameter, elevation and fittings on the system.

Currency
Currency selector changes display only. No exchange-rate conversion is performed.

Ship & SOLAS Fire-Main Basis

Enter the approved total required main fire-pump capacity from the vessel's statutory / class calculation. The tool applies ship-type and gross-tonnage screens for minimum pump count, individual pump capacity and hydrant residual pressure.

m³/h. Use the approved SOLAS / class value. Cargo-ship general rule calculations are commonly capped at 180 m³/h, subject to special arrangements.
bar(g), used only when Custom is selected.
kg/m³.

Hydrants, Hoses & Nozzles

mm, used only for Custom.
m.
mm.

Farthest Fire-Main Route

mm.
m from pump discharge to design hydrant.
m equivalent straight pipe.
m. Use negative value if below pump discharge datum.

Advanced Fire-Main Route Register

Build the hydraulic path from pump discharge to the most remote / unfavorable hydrant. Each segment carries the entered fire-main design flow in this screening model. Use separate scenarios where real branches materially change the flow distribution.

Segment Length m ID mm Darcy f Minor K Elevation change m

Main Fire Pumps

m³/h.
bar(g) at the relevant operating flow.
%.
kW.

Emergency Fire Pump

m³/h.
bar(g).
%.
kW.
m above sea level / suction source at worst service condition.
bar at emergency design flow.
m.
m at emergency design flow.
% above NPSHr.

Readiness & Independence

Fire-safety screening only: This tool is not a SOLAS approval, class-approved fire-main calculation, pump curve, hydrant test, water-spray / monitor system calculation, NPSH study, electrical emergency-power study or fire-control plan. The total required main fire-pump capacity should come from the vessel's approved statutory calculation. Special cargoes, dangerous goods, container-deck monitors, water-spray systems, class notations and flag requirements can increase the governing demand.
Reference basis: SOLAS II-2/10 requires independently driven fire pumps, minimum hydrant pressures and individual fire-pump capacity provisions. Current SOLAS pressure screens are 4.0 bar for passenger ships of 4,000 GT and above, 3.0 bar below 4,000 GT, 2.7 bar for cargo ships of 6,000 GT and above and 2.5 bar below 6,000 GT. Each required fire pump is screened at not less than 80% of total required capacity divided by the minimum required number of pumps, with a 25 m³/h floor, and must be capable of the required jets. FSS Code chapter 12 screens fixed emergency fire pumps at not less than 40% of required total fire-pump capacity and not less than 25 m³/h for passenger ships below 1,000 GT and cargo ships of 2,000 GT and above, or 15 m³/h for smaller cargo ships. Verify the current consolidated SOLAS, FSS Code, flag and class requirements for the vessel.
Generated by ShipUniverse.com
By the ShipUniverse Editorial Team — About Us | Contact