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As a reduced-scale apparatus, the size of the instrument typically limits the size of samples to less than 100 mm 2. [1] Compared to previous devices used in calorimetry , the cone calorimeter produces more reliable data, but must be scaled up to reflect actual fire safety considerations.
A fire test is a means of determining whether fire protection products meet minimum performance criteria as set out in a building code or other applicable legislation. Successful tests in laboratories holding national accreditation for testing and certification result in the issuance of a certification listing .
The completed test sample is inserted into a furnace such that one side is exposed to a fire. The test is terminated when the fire stops successfully meet the test criteria in minimizing the amount of heat and smoke allowed to pass through the assembly, when the fire penetrates the fire stops. This determines the fire stop F-Rating.
A process to perform a water flow test is explained in the model fire codes as published by NFPA (National Fire Protection Association). If a water supply source is considered weak compared to what is required by the sprinkler system design hydraulic calculation, the water pressure can be boosted by means of a fire pump.
This allows the development of an equilibrium between the liquid and the air volume. The ignition source is directed into the cup at regular intervals with simultaneous interruption of stirring. The test concludes upon observation of a flash that spreads throughout the inside of the cup. The corresponding temperature is the liquid's flash point.
The tests varied in that Test One allowed the fire to develop freely to post-flashover conditions, while Test Two incorporated sensor-informed ventilation management and was extinguished before post-flashover conditions were attained. Both tests had approximately 300 sensors monitoring several different characteristics of the fire environment ...