Downloaded from https://www.everyspec.com MIL-STD-2031 (SH) APPENDIX B DAVID TAYLOR RIXEARC!-1 CENTER llURN-TIIROUGll F!RR TEST 10. SCOPE 10.1 Scope. This test method describes a proccdurc to determine the time to burn through materials subjected to a temperature of approximately 1095 (2000 for 1 hour under a controlled laboratory tire exposure. This is a temperature which may be experienced by direct flame impingement or from high heat fluxes associated w-th fluid-hydrocarbon fueled pool fires. The results horn this test can be used to compare material performanu in containing and preventing the propagation of fire, smoke, and fire gases between compartments or spaces.
This appendix is a mandatory part of the standard. 20. APPLICABLE DOCUMENTS. This section is nol applicable to this appendix. 30. EQUIPMENT 30.1 Test stand shall be constructed the following assembly. A test stand assembly containing a test stand and a fire chamber to the dimensions shown in figure 1. A test stand assembly shall consist of 30.1.2 Mounting. The test stand has a steel mounting plate approximately 4 by 4 feet which simula= a bulkhead and w“IIallow a malefitd speeitnan to be bolted to the plate for test and 8]1OW the fire chamber 10 be attaebed to uomd the ha exposure temperature. 30.1.2 Fire chamber.
The fire chamber is a steel plate box approximately 3 feet wide, three feet deep, and 3 feet long. A 12 by 12 inch opening on one side serves as an air inlet and viewing port. The rear of the box is open for maintaining and mounting a propane burner. The burner shall be mounted 18 inehea from the sample to be tested. A sliding plate door on top of the fire chamber is used to adjust air flow and temperature on the specimen. 30.2 Propane burner. A propane burner capable of providing 500,000 British Thermal Units per hour with a fuel source of at least l-hour duration shall be used. The temperature at the face of the specimen shall be 1095 ~ 110 (2000 A 200 ‘F). 30S Tbermoeouples.
The temperature of the flame and non-flame faces of the material speeimen shall be measured using ineonel-sheathed, Type ~ 18-gauge chromel-alumel therm- couples ~). The time ecmstant of the TC assemblies shall be less than 60 seconds and the TC aecuraey shall be *0.75%. At least eight TCS shall be used, two on the fire side and six on the non-fire side of the test specimen. )4