Reliability of Explosive Squibs Used in Fire Deluge Systems
Technical paper 8 Aug-30 Nov 2011
AIR FORCE RESEARCH LAB TYNDALL AFB FL MATERIALS AND MANUFACTURING DIRECTORATE
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The purpose of this test and evaluation project was to collect successfailure rate data on 129 explosive actuators, like those used in the Advanced Fire Protection Deluge System AFPDS, that had been stored for a number of years. The manufacturer specifies a shelf life for the actuators of 10 yr when stored at 68 deg F and 2 yr when stored at 122 deg F. The actuators were stored in a non-climate controlled earth covered magazine structure in which temperature was between 68 deg F and 122 deg F several months every year for up to 8 yr 4 mo. For testing, the actuators were subjected to electrical current above the minimum recommended. All 129 actuators detonated. Results indicate that explosive actuators stored at temperatures between 68 deg F and 122 deg F for up to 8 yr 4 mo have at least 94 reliability. This information can be used in probabilistic risk analysis calculations by organizations with facilities equipped with high-speed explosive suppression and fire extinguishing systems that use these actuators.
- Ammunition and Explosives