6/5/2026
Efectis has performed multiple tests with the nitrogen gas extinguishing system of ExxFire. The tests were carried out according to a test plan based on UL 2775. The tests were witnessed by an independent UL representative.
The testing program included distribution tests, class B fire tests, pyrotechnic containment tests and fire exposure tests. The distribution and class B fire tests were performed in purpose-built enclosures with predefined dimensions, specifically designed to meet the maximum volume requirements of the extinguishing system.
During the distribution tests the ability of the extinguishing system to extinguish fires in the corners of an enclosure was investigated. This was achieved by igniting heptane-filled cans positioned in the corners of the test enclosure, as well as behind a baffle to simulate obstructed conditions. Following a defined pre-burn period, the extinguishing system generator was activated. Thermocouples installed above the heptane cans monitored whether the heptane fires were extinguished.
During the class B fire tests, the ability of the system to extinguish a class B fire (liquid fire) was investigated. During this test, a pan with heptane was ignited. Thermocouples above the heptane pan were placed to monitor the extinguishment of the heptane fire.
The pyrotechnic containment test was performed to observe if the activation of the extinguishing system could cause ignition of an explosive mixture of propane and air. For this purpose, the generator was installed in a cylindrical test vessel. In the test vessel propane was introduced to create a stoichiometric mixture of propane and air. After the introduction of propane, the generator inside the test vessel was activated.
To verify an explosive mixture would ignite inside the test vessel, a separate verification test was performed. Instead of the generator, an ignitor was installed in the test vessel. Activation of the ignitor resulted in an explosive combustion of the stoichiometric mixture and a vented flame was visible, thereby confirming the test conditions.
Two fire exposure tests were performed. During this test, a generator was installed above a heptane pan. The heptane in de pan was ignited and burned freely for 60 seconds. After the fire exposure, the generator was activated to confirm the generator still operates as intended. Overall, a successful test campaign for ExxFire.
For more information about tests with extinguishing systems or other related questions, please contact Anouk Burgstad