A ship’s gaseous extinguishing system typically comprises between 200 and 600 cylinders each containing 45KG of CO2 under high 720 psi/ 49 bar pressure. (Other suppressant clean agents such as FM-200® and Novec™1230 are becoming more widely used.)
How are we failing to protect the crew with these gaseous extinguishing systems?
Because gaseous extinguishing systems are highly pressurised, the risk of leaking and discharging is accepted as part of their use and this is shown in the regulations that demand their upkeep.
IMO SOLAS & FSS Code Chapter 220.127.116.11 - “Means shall be provided for the crew to safely check the quantity of the fire extinguishing medium in the containers.”
Some marine service companies estimate that 20% of a ship’s CO2 cylinders have discharged or partially leaked their contents at some point in their lifetime also know that occasionally marine “servicing companies” unintentionally leave it disabled.
Why is this the case?
Most marine servicing companies only have 4 hours on a vessel in a port to test up to 600 cylinders. It is known that it takes 15 minutes for a 2 person team to shutdown, dismantle and weigh a single CO2 cylinder, which is equal to 16 cylinders in 4 hours. Yet despite this, every CO2 cylinder on the vessel receives a “tested and certified sticker” and the marine CO2 system is certified and a certificate is issued.
As well as this, any vessel with a gaseous extinguishing system needs to consider 3 factors:
What measures should be taken?
“Fire protection on board is not unlike fire protection in buildings: If a fire breaks out and is not quickly brought under control, all that is left is a ruined shell, fit only for the wrecking ball. In turn, in the case of ships, a total write-off. To better protect the cargo on container ships, with a value running into many millions, it makes sense to modernize the on-board facilities for containing and extinguishing fires.”
There is a call to respond to regulations with a rigorous attitude, to go above and beyond, to provide security of life and infrastructure.
Currently, there is a failure to protect the lives of the crew. Ensuring the safety of the crew is not an option, it is a requirement.
What is the solution?
The crew must take responsibility for its own fire protection.
Using an ultrasonic liquid level indicator is the only way that the crew can safely test their CO2 without disturbing them. Coltraco Ultrasonics designed the Portalevel® MAX Marine & Portamarine® ultrasonic liquid level indicators, as radioactive units were being phased out. If shipping companies implemented the IMO SOLAS FSS codes by testing safely and quickly (just 30-60 seconds per cylinder) by using liquid level indicators and marine servicing companies were able to do their work without allowing for time pressures, then vessels would be far safer.
Solutions for the monitoring of the vessels gaseous extinguishing system exist: