# Flammability Examples (Templates)

#### Relevant Terms and Definitions:

• Barrier, Fire- An obstruction (such as a partition) that prohibits or tends to inhibit the propagation of burning. May be internal or external in configuration.
• Break, Fire- A gap, opening, or nonflammable material between flammable materials which would prevent propagation of burning.
• Containers, Sealed- Containers that are enclosed adequately enough to preclude the replenishment of a combustible atmosphere under conditions of a fire.
• Containers, Vented- Containers that are unsealed and permit atmosphere exchange.
• Containment, Fire- The situation in which a fire and/or burning particles do not progress, in any manner, beyond the confines of a configuration.
• Flammable- A material which fails to meet acceptance criteria when tested.
• Heat Sink- A structure or panel of high thermal conductivity in intimate contact with a burning material which extracts sufficient heat by conduction to lower the temperature below the ignition point and extinguish burning. An effective heat sink could limit initial ignition.
• Ignition Source- A source of heat sufficiently intense and localized to induce combustion. For flammability consideration, any electrical wire or elevated temperature component is considered an ignition source. Monopropellants, strong oxidizers, bases, etc. must also be considered.
• Nonflammable- A material that meets the acceptance criteria when tested according to the requirements of NHB 8060.1 (i.e., one that self-extinguishes within 6 inches when ignited).
• Positive Igniters- Igniters that produce a controlled flame.
• Propagation Paths- the paths taken by a flame front external to (or within) an enclosure that represent fire paths between flammable materials. They are not necessarily straight or coplanar.
• Void Space- Unoccupied volume in a container.

#### Flammability Logic

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