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Fire Test Performance of Eleven PFAS-Free Class B Firefighting Foams Varying Fuels, Admixture, Water Types and Foam Generation Techniques
RISE Research Institutes of Sweden, Safety and Transport, Fire and Safety.ORCID iD: 0000-0001-9432-0264
RISE Research Institutes of Sweden, Safety and Transport, Fire and Safety.ORCID iD: 0000-0001-6583-3247
RISE Research Institutes of Sweden, Safety and Transport, Fire and Safety.
2022 (English)In: Fire technology, ISSN 0015-2684, E-ISSN 1572-8099, Vol. 58, no 3, p. 1639-1665Article in journal (Refereed) Published
Abstract [en]

The firefighting performance of eleven PFAS-free firefighting foams was evaluated using different fuels (Jet A1, commercial heptane and diesel) and types of water (freshwater and synthetic sea water). Moreover, different firefighting foam generation techniques and application methods were evaluated. The firefighting foams were generated as aspirated foams or as compressed air foams (CAFs). The results for CAF showed a higher performance, with respect to extinction time and burn-back resistance, compared to the foam generated using a UNI 86 nozzle. The CAF was not optimised, indicating a further potential of this foam generation technique. The results indicate that the time to fire knockdown decreases with decreasing foam viscosity. The heat flux was shown to be small, although the entire fuel surface was involved in the fire. The tests showed a dependence on fuel type; different products performed differently depending on the fuel. Tests using sea water showed that addition of salt to the foam solution generally prolonged the extinction time, although for one of the firefighting foams a shorter extinction time was observed. Out of the eleven evaluated PFAS-free products there was no product that outperformed the rest. None of the products in the study met the fire test performance requirements in all the referenced standards. Instead, the products seem to have different niches where they perform best e.g., with different types of fuel or water.

Place, publisher, year, edition, pages
2022. Vol. 58, no 3, p. 1639-1665
National Category
Occupational Health and Environmental Health
Identifiers
URN: urn:nbn:se:ri:diva-58576DOI: 10.1007/s10694-022-01213-6Scopus ID: 2-s2.0-85124406875OAI: oai:DiVA.org:ri-58576DiVA, id: diva2:1639238
Note

Open access funding provided by RISE Research Institutes of Sweden. This research has been conducted within the project Testbed PFAS and is funded by the Swedish Fortifications Agency, the Swedish Defence Materiel Administration, the Swedish Armed Forces and RISE. Firefighting foams were provided by the different firefighting foam manufacturers.

Available from: 2022-02-21 Created: 2022-02-21 Last updated: 2024-05-22Bibliographically approved

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Dahlbom, SixtenMallin, Tove

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