Fixed CO₂ Fire-Extinguishing Cylinder Quantity, Flooding Concentration & Release Time Tool

Screen required free-gas quantity, cylinder count, verified bank charge and release-time capability, then use Advanced for multiple protected spaces, selector and sealing readiness, alarms, maintenance, hydrostatic testing and service planning.

↑

Need much more depth? Click Advanced above.Advanced adds protected-space rows, low-pressure storage, alarms, selector/sealing status, maintenance, hydrostatic-test scope, hose age, valve inspection and service cost.

Fast10 primary inputs

Core answerMass + bottles + release time

VisualBank coverage + discharge curve

Single Protected Space

For machinery spaces, enter both the reduced-casing volume and the entire volume including casing. Starting-air receiver free-air volume is added to the machinery-space gross-volume bases.

Ship service

Gross tonnage

Protected-space category

Reduced / cutoff protected volumem³, machinery basis.

Entire gross protected volumem³.

Starting-air receiver free-air volumem³ free air, machinery only.

Nominal CO₂ charge / cylinderkg.

Installed cylinders

Average verified charge% of nominal.

Approved / calculated discharge capacitykg/min.

Vessel & Storage Basis

Ship service

Gross tonnage

CO₂ storage arrangement

Nominal charge / cylinder

Installed cylinders

Installed low-pressure inventorykg.

Average verified available charge

Design contingency% above statutory minimum, planning only.

Fixed FSS conversion: 0.56 m³ free CO₂ per kg.

Protected-Space Register

Each row is calculated independently; the largest required mass governs the shared bank. Space names are not sent through Tool Data.

Space	Category	Reduced m³	Full m³	Air rec. m³	Accessible	Custom gas %	Custom frac %	Custom min	Req. kg	Cyl.

Bank Charge, Release & Controls

Cylinders below 90% nominal charge

Approved bank discharge capacitykg/min.

Pre-discharge alarm delayseconds.

Selector / distribution path

Protected space can be sealed

Maintenance & Service

Days since monthly inspection

Months since annual visual

Contents-verification / survey status

10-year hydro sample due

20-year / later full-bank hydro due

Failures in initial 10% sample

Further failures after expanded test

Flexible discharge hoses

Oldest hose ageyears.

Maker / SMS hose intervalyears, max 10 in this screen.

Years since control-valve internal inspection

Specialist functional test status

Service Campaign Cost

Hydro test / cylinder

Recharge / cylinder

Hose replacement / hose

Service attendance

Additional cylinder purchase

Contingency%.

Fire-safety limitation: This tool does not size piping, nozzles, manifolds, orifices or selector valves; prove agent distribution; authorize release; or replace approved hydraulic calculations, vessel fire-control plans, flag/class approval, manufacturer instructions, SMS, surveyor or competent service technician. CO₂ is lethal to personnel.

Current basis: SOLAS chapter II-2 and FSS Code chapter 5. Free CO₂ is calculated at 0.56 m³/kg. Cargo spaces normally use 30% of gross volume. Vehicle and ro-ro spaces that are not special category spaces use 45%, with at least two thirds introduced within 10 min. Machinery spaces use the larger of the reduced-casing and entire-volume percentage bases and require 85% discharge within 2 min. Container/general cargo spaces require at least two thirds within 10 min; solid bulk cargo spaces require at least two thirds within 20 min. MSC.1/Circ.1318/Rev.1 provides the maintenance framework. The current IMO consolidated publication is the FSS Code, 2026 Edition.

Generated by ShipUniverse.com

By the ShipUniverse Editorial Team — About Us | Contact

Explore our latest intelligence radars

Fixed CO₂ Fire-Extinguishing Cylinder Quantity, Flooding Concentration & Release Time Tool