In accordance with SOLAS Chapter II-2 (Regulation 10.3), IMO Resolution A.951(23) (Improved Guidelines for Marine Portable Fire Extinguishers), and Classification Society rules, all portable and semi-portable fire extinguishers aboard commercial vessels must undergo rigorous annual examinations, periodic internal inspections, chemical recharging, and hydrostatic pressure testing.
Engineering Overview & Table of Contents
- 1. Statutory Framework: IMO Resolution A.951(23) Compliance
- 2. Technical Classification: DCP, Foam, CO2 & Clean Agent Systems
- 3. Annual Inspection Protocol: Pressure Gauges, Seals & Cartridges
- 4. Chemical Refilling, Recharging & Foam Concentration Testing
- 5. Hydrostatic Pressure Testing & Structural Integrity Standards
- 6. Dockside Servicing & Turnaround Logistics Across UAE Ports
1. Statutory Framework: IMO Resolution A.951(23) Compliance
Portable fire extinguishers provide first-response firefighting capability for deck, accommodation, galley, and machinery spaces. A clogged nozzle, depressurized propellant cylinder, or compacted dry chemical powder can cause immediate disaster during an incipient fire emergency. Seanav is class-approved to deliver Portable Fire Extinguisher Supply, Marine Fire Extinguisher Supply, Fire Extinguisher Annual Inspection, and certified shore maintenance.
2. Technical Classification: DCP, Foam, CO2 & Clean Agent Systems
We supply, maintain, and certify the full range of maritime portable and wheeled trolley units:
- Dry Chemical Powder (DCP) Fire Extinguisher Supply: Standard ABC (monoammonium phosphate) and BC (sodium bicarbonate) powder units (6 kg, 9 kg, 12 kg, and 50 kg wheeled trolleys) for fuel, electrical, and general surface fires.
- Mechanical Foam Fire Extinguisher Supply: AFFF (Aqueous Film Forming Foam) premix and cartridge-operated units (9 liter and 45/135 liter wheeled foam units) for engine room bilges and oil fuel bunker manifolds.
- CO2 Fire Extinguisher Supply: High-pressure aluminum and seamless steel CO2 cylinders (2 kg, 5 kg, and 20 kg trolleys) fitted with non-conductive discharge horns for electrical switchboards and bridge navigation consoles.
- Clean Agent & Wet Chemical Extinguisher Supply: Specialized HFC-227ea / Novec 1230 clean agents for computer server rooms and Class F / Wet Chemical units for galley deep-fat fryers.
3. Annual Inspection Protocol: Pressure Gauges, Seals & Cartridges
Seanav service engineers execute thorough on-board or shore station servicing in strict accordance with IMO Resolution A.951(23):
Annual Multi-Point Inspection Sequence:
- Physical Casing Inspection: Inspecting external cylinder body for corrosion pitting, denting, weld bead cracks, and legible instruction labels.
- Discharge Hose and Horn Check: Blowing dry air through discharge hoses, checking EPDM rubber flexibility, and inspecting horns for fractures.
- Pressure Gauge Calibration: Verifying stored-pressure gauges using master pressure calibration manifolds; checking green sector charge limits.
- Propellant Cartridge Weighing: Dismantling CO2 gas propellant cartridges on cartridge-type extinguishers and weighing against stamped tare weights (reject threshold > 10% mass loss).
- Powder Fluidity Audit: Inverting dry powder extinguishers to verify that powder is completely free-flowing and has not caked due to vessel engine vibration.
4. Chemical Refilling, Recharging & Foam Concentration Testing
Periodic refilling ensures agent chemical potency. In accordance with Class rules, mechanical foam extinguishers must be refilled every 2 years (or per manufacturer’s instruction), while DCP units require discharge testing on a rotating percentage basis:
| Extinguisher Type | Refilling Interval | Servicing Protocol |
|---|---|---|
| Mechanical Foam (AFFF) | Every 1 to 2 Years | Flushing body, preparing fresh AFFF concentrate and demineralized water solution, and replacing valve O-rings. |
| Dry Chemical Powder (DCP) | Every 5 Years (or after discharge) | Emptying powder, checking internal lining, refilling with fresh certified siliconized powder, and pressurizing with dry nitrogen (dew point < -40°C). |
| Carbon Dioxide (CO2) | When weight loss > 10% | Decanting residual gas, inspecting neck threads, and refilling with liquid CO2 using high-pressure cryogenic transfer pumps. |
5. Hydrostatic Pressure Testing & Structural Integrity Standards
Every 5 or 10 years (depending on Flag State and extinguisher type), all extinguisher bodies and propellant cartridges must undergo statutory hydrostatic proof pressure testing. Seanav uses automated hydraulic test benches with burst containment chambers, applying 1.5 × to 2 × maximum working pressure. Tested cylinders are thoroughly oven-dried, stamped with test dates, and fitted with tamper-evident inspection tags.
6. Dockside Servicing & Turnaround Logistics Across UAE Ports
To eliminate sailing delays, Seanav operates shore transport fleets that board vessels immediately upon berthing. We supply certified service-exchange extinguishers while shipboard units are serviced at our workshop, returning recertified units complete with Class survey endorsements across all major UAE ports.
Order Portable Extinguisher Inspection or Certified Shore Recharging
View our full FFA servicing scope on our Portable Fire Extinguisher Commercial Hub or request dockside assistance at your next Indian Port of Call.