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    Fire suppression systems in buses

     

    A fire in the engine compartment of a bus can be devastating for the driver, passengers and results in unwanted downtime or even worse a complete destruction of the bus. High pressure water mist is a superior suppression technique in an engine compartment to strongly limit the consequences of a bus fire. 

     

    Important aspect when protecting the bus where the effectiveness of the system means that damage to buses and material will be small and result in low repair costs. The investment of an efficient high pressure water mist system will only be a very small part of the total investment needed when procuring new buses. Throughout the world, different organizations have found the need for installation of automated fire suppression systems in the engine room, as an important fire safety measure. Furthermore, some insurance companies and individual bus operators already require fire suppression systems and the trend is going in the direction that we see a demand for fire suppression systems in buses which also now lately is very obvious because of the new legislation according to UN ECE R107 (read more below). Today there are about 50 European countries which have signed this legislation and countries also outside Europe seems to follow.  In practice will R107 results in that every new bus exceeding 22 passengers have to have an OEM homologated fires suppression system in the bus from 2021. R107 will be introduced step by step during 2018-2019 for coaches and finally also includes city buses during 2020-2021.

    First fire suppression system approved in accordance with R107

    Fogmaker approved in accordance with latest international standard for fire suppression systems in bus.
    Fogmaker became the first manufacturer to implement the official tests with successful results in October 2016. Fogmaker has also made the first fire suppression system available that has the type approval –                                                                             

    UNECE Regulation No.107 Cert. No. 06001 (2017-01-18).

    Fire testing procedure follows four tests from SP method 4912, see results below:


    Specifics for a R107-approved Fogmaker system*:

    *Depending on the risk assessment for each specific engine, upscaling of extinguishant volume and number of nozzles will occur – the data below is the minimum requirement for the stated engine compartment gross volume.

    – Gross volume “engine compartment”: 4 m3
    – Extinguishant volume: 6.1 litres
    – Number of spray nozzles: 11 pcs
    – Type of nozzle: “Hollow cone nozzle” 1.2 l/min
    – Distance most remote nozzle: 8 m

    More information about UNECE Regulation 107:

    Legislation towards improved fire safety in buses and coaches in Europe (47 contracting parties applying)
    Fixed installed FSS (Fire suppression system) will be a part of the bus manufacturer′s vehicle approval
    The requirement of installation of FSS applies to the vehicle
    FSS systems can be approved as a “component” by test in a defined test rig or installed in a specific engine compartment
    R107 covers the following vehicles exceeding 22 passengers:
    – Class I (standing passengers)
    – Class II (seated and standing passengers. City buses)
    – Class III (seated passengers. Coaches)
     

     

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