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NOTE: This is an unformatted excerpt from our online fire protection training library.

Identifying Materials & Equipment

TABLE 5.1 - SELECTED CHEMICALS -

Chemical NEC Group Type Flash Point (°C) AIT (°C) %LFL %UFL Vapor Density (Air=1) Vapor Pressure (mm Hg) Class I Zone Group MIE (mj) TR MIC Ratio MESG (mm) Acetic Acid D* II 43 464 4.0 19.9 2.1 15.6 IIA    2.67 1.76 Acetone D* I    465 2.5 12.8 2.0 230.7 IIA 1.15 1.00 1.02 Acetylene A* GAS    305 2.5 99.9 0.9 36600 IIC 0.017 0.28 0.25 Benzene D* I -11 498 1.2 7.8 2.8 94.8 IIA 0.20 1.00 0.99 Carbon Monoxide C* GAS 609 700 12.5 74.0 0.97    IIA          Ethyl Alcohol D* I 13 363 3.3 19.0 1.6 59.5          0.89 Formaldehyde (Gas) B GAS 60 429 7.0 73.0 1.0             0.57 Fuel Oil 1 D II 72 210 0.7 5.0                   Hydrogen B* GAS    520 4.0 75.0 0.1    IIC 0.019 0.25 0.28 Kerosene D II 72 210 0.7 5.0       IIA          Methane D* GAS -233 630 5.0 15.0 0.6    IIA 0.28 1.00 1.12 *Material has been classified by test.

This chart can be found in NFPA 497-1997, Table 2-1.
NOTE: This is an unformatted excerpt from our online fire protection training library.

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