New white paper from Survitec urges reform of methanol fire safety guidelines
Global Survival Technology solutions provider Survitec has welcomed new guidance from classification society DNV on the fire safety arrangements for methanol-fuelled vessels but advises that more work is required before ships running on methanol can be completely fire-safe.
Findings from a Survitec study carried out earlier this year and published in the White Paper ‘Do we need new fire safety standards for methanol?’, distributed to industry for the first time at the SMM trade fair in Hamburg, Germany, confirmed existing fire-fighting methods are insufficient for methanol.
The safety study conducted by Survitec found two factors were key to putting out a methanol engine room fire: the volume of water released under pressure and the discharge pattern of the water. This required adjustments to the water pump supply and the water mist nozzle's spacing and placement height to achieve the right coverage to completely extinguish the fire.
“While the LAFF system is a localised first-response system that focuses on the most likely source of a fire, generally the engine, a gas-based Total Flooding solution – CO2 or Survitec 1230 Clean Agent – will also be required to cover the entirety of the machinery space,” said Sadzyński.
The firefighting foam typically used to extinguish bilge hydrocarbon fires was also found to be inadequate, even alcohol-resistant foams using conventional nozzles and water:foam ratios, leading Survitec to develop new nozzles and attachments.
These nozzle adaptors aspirate the foam, allowing it to expand within the space and to extinguish methanol, diesel, heptane and lubrication oil fires. Trials of the new nozzle also confirmed that fluorine-free alcohol-resistant foam was just as effective with the new adaptor for methanol fires as standard AFFF alcohol-resistant foams.
A particular issue of concern is that international guidelines do not provide clear test protocols for alcohol-based fires. These are required, says Survitec, because the firefighting systems, foams and nozzle configurations used for hydrocarbon fires are ineffective in extinguishing alcohol-based fuel fires. As a result, system arrangements must be adapted to work for methanol fire, with system performance then tested and verified in the lab.
The tests carried out at the RISE Fire Research Laboratory, Trondheim, Norway, one of the world’s largest research organisations on fire, showed that for Category A Machinery Spaces, three separate systems are required to protect the ship and crew from methanol-fuelled engine fires.
The Survitec fire safety team has since been working to raise awareness of the key challenges surrounding methanol fire safety and share their findings from the safety study. They are already discussing with other class societies and shipyards how to develop comprehensive requirements covering all vessel types.
Survitec is a global Survival Technology leader to the maritime, defence & government, aerospace and energy sectors. Survitec has over 3,000 employees worldwide, covering 11 manufacturing facilities and over 400 service centres. They operate in over 2,000 ports, spanning 96 countries. Survitec are the world’s largest manufacturer and supplier of liferaft, Marine Evacuation Systems (MES) and offshore rental PPE. They are a leading supplier of fire solutions to the maritime industry and hold a market leading position for Pilot Flight Equipment in the aerospace & defence market. The Survitec team live by their purpose “We Exist to Protect Lives”.
