Protecting lives, vessels, and critical assets. Complete inspection, testing, and certification of shipboard Fixed CO2 fire suppression systems, delivered by OEM-trained marine fire safety engineers.
Full Inspection Cycle
Annual, biennial, 5-year and 10-year programmes, all in one service.
IMO & SOLAS Compliant
Aligned with SOLAS Ch. II-2, the FSS Code and Flag Administration rules.
Worldwide Coverage
Vessel and offshore installation service, wherever your fleet operates.
01 — Overview
What is a Fixed CO2 System?
A permanently installed fire suppression system, it’s designed to extinguish fires in enclosed spaces by rapidly reducing oxygen levels below the point required for combustion. Unlike water-based systems, it leaves no residue after discharge — ideal for protecting machinery, engines, electrical equipment, and cargo spaces.
Engine Rooms
Machinery Spaces
Cargo Holds
Cargo Pump Rooms
Generator Rooms
Paint Lockers
Flammable Liquid Lockers
Other High-Risk Areas
02 — Why It Matters
A system that must work the first time, every time
Normally, a Fixed CO2 System stays inactive, but it must perform instantly during a fire emergency. Over time, however, corrosion, pressure loss, ageing components, and harsh marine environments can reduce reliability — which is exactly why routine inspection matters, catching problems before they become failure points.
01
Emergency Readiness
Confirms the system will activate correctly the moment it’s needed.
02
Early Defect Detection
Catches corrosion, pressure loss, and wear before they cause failure.
03
Regulatory Compliance
Maintains IMO, SOLAS, Flag State, and Classification Society standing.
04
Survey Confidence
Supports Flag State, Class, and Port State Control inspections.
03 — Inspection Schedule
IMO & SOLAS Inspection Intervals
Every Fixed CO2 System must be inspected and maintained throughout its service life in accordance with approved maintenance programmes, MSC.1/Circ.1318/Rev.1, SOLAS Chapter II-2, and the FSS Code.
Annual Inspection
Confirms system readiness
- Visual inspection of components
- CO2 cylinder condition check
- Pressure verification
- Release mechanism inspection
- Pipework inspection
- Alarm & safety device testing
2-Year Biennial
Detailed component examination
- Cylinder content verification
- Flexible hose inspection
- Manifold inspection
- Release mechanism testing
- Warning system verification
- Operational testing
5-Year Comprehensive
Full condition & reliability review
- Internal valve inspection
- Pilot cylinder inspection
- Release mechanism overhaul
- Pipework integrity assessment
- Alarm & control system testing
- Worn component replacement
10-Year Major Overhaul
Long-term safety verification
- Complete system assessment
- CO2 cylinder hydrostatic testing
- Internal valve inspection
- Loop line inspection
- Release mechanism servicing
- Component replacement as required
04 — In Detail
Inside the Annual Inspection
Together, these checks make up the annual Fixed CO2 System inspection, confirming that the complete system remains safe, reliable, and ready for immediate operation.
Visual & Cylinder Inspection
During this stage, engineers check for corrosion, physical damage, loose mountings, damaged cylinders, and missing labels or warning notices. Each CO2 cylinder is then verified for physical condition, leakage, secure mounting, and hydrostatic test validity, and any damaged cylinder is removed for repair or replacement.
Pressure & Release Mechanism
Next, cylinder pressure is verified to confirm sufficient extinguishing media is available, and any abnormal reading is investigated immediately. Beyond pressure, manual release stations, mechanical release systems, pilot cylinders, remote release controls, and safety locking devices are inspected to confirm safe, reliable activation.
Pipework, Alarms & Safety Devices
Finally, the complete CO2 distribution network is checked for corrosion, damaged fittings, missing nozzles, and blockages. Audible and visual alarms, time-delay devices, and warning notices are also tested, so personnel have sufficient time to evacuate before discharge.
05 — Critical Components
Hydrostatic Testing & Valve Servicing
Two of the most critical elements of long-term Fixed CO2 System reliability.
CO2 Cylinder Hydrostatic Testing
Because CO2 cylinders store gas under high pressure, periodic hydrostatic testing is essential to verify structural integrity. This process includes external and internal examination, hydrostatic pressure testing, cylinder weighing, valve refitting, pressure verification, and reinstallation. Consequently, any cylinder showing corrosion, damage, or deformation is removed from service and replaced.
Internal Valve Inspection
Since the internal valve controls CO2 release during activation, wear, corrosion, or contamination can directly affect reliability. To address this, engineers dismantle the valve, clean internal components, inspect seals and springs, replace worn parts, lubricate moving components, reassemble it, and finally perform functional and leak testing.
06 — Our Services
Complete Fixed CO2 System Services
Inspection, testing, maintenance, overhaul, and certification for commercial vessels and offshore installations worldwide.
- Annual Inspection
- Biennial (2-Year) Inspection
- Five-Year Inspection
- Ten-Year Inspection
- CO2 Cylinder Hydrostatic Testing
- Internal Valve Inspection
- Discharge Hose & Loop Line Renewal
- Cylinder Weighing & Pressure Verification
- Release System Inspection
- Pipework Inspection
- Alarm & Control System Testing
- Documentation & Certification
07 — FAQ
Frequently Asked Questions
How often should a Fixed CO2 System be inspected?
A Fixed CO2 System should undergo annual, biennial (2-year), five-year, and ten-year inspections, together with hydrostatic testing and maintenance as required by IMO guidelines and manufacturer recommendations.
Why is hydrostatic testing important?
It confirms that CO2 cylinders can safely withstand operating pressure and remain structurally sound throughout their service life.
What does a five-year inspection include?
Internal valve inspection, release mechanism servicing, flexible hose inspection, pipework assessment, alarm and control system testing, operational testing, and documentation review.
Why should discharge hoses be replaced?
Discharge hoses deteriorate due to ageing, pressure, vibration, and harsh marine environments. Replacing worn hoses ensures safe, efficient CO2 discharge during activation.
What documents are issued after an inspection?
Inspection reports, test results, hydrostatic test certificates, maintenance records, and service certificates to demonstrate regulatory compliance.
Keep Your Fixed CO2 System Emergency-Ready
Al Safwan Marine’s OEM-trained engineers deliver inspection, testing, and certification in accordance with IMO, SOLAS, and the FSS Code — worldwide.
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Frequently asked questions
How often must a fixed CO2 system be inspected?
Crew carry out monthly and annual checks; an approved service provider must inspect the system at intervals not exceeding two years, including measuring the contents of the cylinders.
When do CO2 cylinders need hydrostatic testing?
At 10-yearly intervals a proportion of cylinders is hydrostatically tested (more if any fail), and flexible discharge hoses are replaced, following MSC.1/Circ.1318 and the flag state's requirements.
Filed under Fire fighting
