What is the internal exam interval for AFFF and FFFP extinguishers?

The internal exam interval for Aqueous Film Forming Foam (AFFF) and film-forming fluoroprotein (FFFP) extinguishers is set at three years. This periodic examination is necessary to ensure the extinguishers maintain their effectiveness and function properly in an emergency situation. During this internal examination, the technician assesses the condition of the extinguisher including the foam agent's integrity and any potential degradation, which could compromise the performance during use. Regular inspections in this manner are crucial for compliance with safety regulations and to guarantee the safety of those relying on these fire suppression systems.

Longer intervals, like five or six years, do not align with the specific requirements set for these types of extinguishers, indicating that more frequent checks are necessary due to the specific properties and uses of AFFF and FFFP agents. Additionally, an annual inspection is not sufficient for comprehensive internal assessments, as issues not visible during external checks may only become apparent during a more detailed internal examination.