In marine applications, Marioff is widely recognized for its expertise in high pressure HI-FOGÂ® firefighting. Many decades of field experience and large scale fire testing have resulted in a long list of patented and approved firefighting components and solutions for many shipboard applications. Since high pressure water mist is harmless to humans and the environment, can be released instantly, and for its rapid extinguishing properties, HI- high pressure water mist FOG is considered the preferred firefighting technology in marine segments such as cruise ships, ferries, warships, superyachts, offshore, LNG and cargo ships.
In the bulk handling industry, Marioff is increasing firefighting capabilities through the global self-unloading fleet. The Marioff scope includes fire detection and HI-FOG fixed fire protection of the internal spaces of the conveyor belt (tunnels and c-loop), installation and integration with the ship’s power management system.
Given previous bulk carrier fires including Halifax (1993), Ambassador (1994), Yeoman Bontrup (2010), Spencer Gulf (2017), Iron Chieftain (2018), Donnacona (2020), St Clair (2020) and Roger Blough (2021), Marioff raises awareness and promotes increased safety standards and regulations for this type of vessel.
Typically, a single defective bearing is enough to ignite a rubber conveyor belt in the internal cargo handling space, creating a risk to human health, the environment, reputation and business continuity. Property losses reported in the fires mentioned above range from $ 20 million to over $ 150 million. (Sources: National Transportation Safety Board Marine Accident Brief, No .: DCA19FM020 and Sturgeon Bay Fire Dept., FDID 15070.)
The effectiveness of the response to fire on board depends on early detection and instant extinguishing at the source. Current detection and suppression methods on board most self-unloading vessels are insufficient.
Large-scale fire tests on the conveyor belt revealed that due to the rapid fire extinguishing property of the very fine water mist produced by the HI-FOG system, all temperatures were below 100 Â° C in less than 15 minutes.
Unlike gaseous solutions, water mist can be used safely when personnel are in the protected space. It is the ability to instantly trigger the HI-FOG system, which is crucial in the event of a fire. There are different ways to activate the system: automatically by the detection system, remotely from the HMI screens at the workstations or manually at the section valves. Additional user interface screens are installed in the cargo control room and engine control room.
HI-FOG approved stainless steel spray heads, tubing and section valves are strategically installed in tunnels and loop conveyor systems c. Fire fighting time is extended by using two water sources, fresh water as the primary source and sea / lake water as a secondary source. Once the fire is under control or extinguished, the HI-FOG system can be reset and is once again ready to protect the vessel and crew.
High pressure water mist is deployed on all internal conveyor systems. Very small droplets give a very large total water surface. This allows efficient cooling of the fire and surrounding areas and gases.
The effectiveness of a HI-FOG system is based on three aspects:
* cooling of the fuel source;
* displacing the oxygen from the hearth of the fire, thus smothering the flames; and
* block radiant heat to prevent fire from spreading.