SP Technical Research Institute of Sweden developed a new standard for fire suppression systems in engine compartments of buses and coaches.
The work has been carried out in part on behalf of the National Road Authority in Sweden. The objective has been to construct a model of an engine compartment where stakeholders can evaluate the firefighting performance of different suppression systems in a well-defined and objective way. The new standard SP method 4912, edition 3 has just been published.
A Reference Group has provided valuable input and know-how to the standards development. International representatives from suppression manufacturers, insurance companies, bus associations, transit authorities and bus manufacturers have contributed.
The main objective of the research leading up to the standard development has been the promulgation of this standard at the UN ECE Working Group on General Safety Provisions (GRSG) in Geneva. Should the standard be accepted in this forum it will be required to have fire suppression systems installed in buses and coaches.
In parallel SP has established a voluntary certification/quality mark for the industry — the P-mark — according to SPCR 183 (SP Certification Rules) due to the fact that progress through the GRSG can be protracted. A P-mark certifies that the product meets the requirements of relevant standards and regulations and that the manufacturer or importer operates an approved inspection and quality control scheme.
To obtain a P-mark in accordance with SPCR 183, the fire suppression system will need to fulfill the requirements in SP method 4912 in which the capacity of the system to extinguish different types of fires is evaluated. In addition testing of all components as part of the system is also required. This means that detectors, electrical/electronic components and control panels will be performance tested for harsh environments, EMC, temperature and humidity extremes.
Transit Authorities can now start citing P-marked systems in accordance with SPCR 183 in their technical requirements for procurement of fire suppression systems.
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