Downloaded from https://www.everyspec.com I MIL-STD-2(N1(SII) e. A smoke obscuration measuring system is rccommendtd but optionai. f. The test cell should have available connections and ancillary equipment to provide fluids and air 11OWto enahic Lhe material application [o be operated in normal modes. ‘rhesc capahilitics do not ha;’c to bc made i]viiil~blc in all cases, but the design of the test cell shall inuludc [he requirements. A steel sided test cell is easier to alter when adding additional ancillary services. 30.2 Fuel supply. The fuel supply shall include the following: a. FueL For structural tests the use of a clean burning fuel such as heptane or bexane is recommended.
For fire extinguishment tests, fuels found in the submarine such as died fuel or 2190 TEP hydraulic fluid should be utilized. b. F’ti pan. A stainless steel all welded construction pan sized for the fire shall be used. It should have connections to add fuel and to maintain the water base layer during burning operations. c. Fuel suppfy sysfem. A fuel pump (manual or automatic) with a Ilow meter shall provide a continuous flow of fuel from the supply containers to the fire pan. d. Water base layer. A continuous supply of water to the fuel pan shall maintain the water base layer. . . . .,. , ,,. ,., , ,,.,, ,,, 30S Extinguishment.
For safety purposes a-charged fire hose shall he available during all fire tea@ Standard submarine extinguishing sys@ms shall be used for ease of ew@@dtmcnt team Tbe following existing extinguishment systems shall be used: 2 1/2 gallon AFFF extinguisher, 18 pound PKP extinguisher, 30 pound C02 extinguisher, and the Navy all purpose nozzle with 30 lb/in2 water pressure. 30.4 The rmneouples. Temperatures of the flame and material application shall be measured using inconel-sheathed, type K lfl-gauge chromel-alumcl thermocouples. The time constant of the thermocouple assemblies shall be less than 60 seconds. Thermocmple accurq shall be plus or minus 0.75 percent.
At least four thermocouples shall be utilized: one above the fire pan to measure the flame temperature, one in the overhead, one at the level of the material application in the flame, and one at the level of the material application outside the flame. Additional thermocouples shall be used as appropriate for the material application being tested such as internal to piping or ducting. 30.5 Video system capability. Video camera and equipment shall be used to record the test setup before test start, light off of the fuel pan, duration of the test and post fire damage shall he used. At least one of the cameras shall have a test time generator.