Downloaded from https://www.everyspec.com MIL-STD-2031(SH) 3.17 flashover Qnm-ter-scale fire test. A quarter-scale fire [CSL potential of materials in a room when subjected to is a test method to determine the a fire exposure. 3.18 Smoke. Smoke is [he airb[~rnc solid and liquid particulalcs and gases evolved when a matcrlal undergcws pyrolysis or combustion. 3.19 Smoke obscumtion. Smoke obscuration is the reduction of light transmission by smoke as measured by light attenuation. 3.20 Toxicity performance. Toxicity performance is the potential toxic effects of combustion products (smoke and fire gases). 4. GENERAL REQUIREMENTS 4.1 Fire characteristics and test methods.
The fire characteristics to be investigated and the test methods and requirements for qualif@g a composite material system for use aboard a naval submarine are defined in table I (see 6.3 and appendix G). Any exceptions to these requirements will be identified in the acquisition documents for the specified application (see 6.2) and must be approved by NAVSIUL 4.2 QuiWkation. 4.2.1 Requirement. Use of composite material systems for interior submarine applications requires Nalml Sea Sya@ns Command, approval of &be fiiet and tmdcity perhrmmce f~ the composite material system.
Campliartee with this requirement is the responsibility of all Naval activiti~ and contraetora that provide produck equipments, or aeavkza in support of Naval submarine ecmstruction or operation. The Non-metallic Materiaia Branch of the Naval Sea Systems Command has approval responsibility for use of composite material systems on Naval vessels TABLE 1. Fire chnractektics and tests. me Iesuctlaraetcristks Rcquircmcnt Test method ~n-temperance htrlex Pereemcxygcnat 2S~ Pcreenttxygcaat 75 Y Pcrccntcaxygenat 300 Y Minimum 35 30 21 Appendix A Flamespmd (index) Maximum 20 ASTM E 162