EXPLANATION OF TERMS - TM-9-1300-2770129

TM 9-1300-277

Hangfire-See Malfunction.

demolition material and blasting caps. The holding area

must be situated at great enough distance from the

Hazard-Any condition which may result in, or contribute

disposal point or barricaded to ensure the material

stored therein is safe from premature detonation from

to, the severity of an accident.

flying debris resulting from a disposal action.

Hazard Classification-Identifies the hazardous charac-

Hydrolysis-The reaction of a chemical agent or chemical

teristics of explosives items by assignment to

established hazard categories governing storage and

substance with water, whereby decomposition of the

transportation.

These categories are:

Quantity-

substance takes place and one or more new substances

Distance

Class,

Storage

Compatibility

Group,

are produced. Hydrolysis reduces the effectiveness of

Department of Transportation (DOT) Class, and DOT

many chemical agents; although, in some, the resulting

Marking.

product of hydrolysis may in itself be a poison, as with

agents containing arsenic. The rate of hydrolysis is

Hazardous Fragment-A hazardous fragment is one

determined by the resistance offered by a chemical

agent or substance to decomposition by water.

having an impact energy of 58 foot-pounds or greater.

Hypergolic-A property of various combinations of

Hazardous Fragment Density-A density of hazardous

fragments exceeding one per 600 square feet.

chemicals to self-ignite upon contact with each other

without a spark or other external initiation.

Hazardous Locations for Electrical Equipment Locations

Incendiary-Ammunition with inflammable filling.

where flammable gases or vapors are or may be present

in the air in explosive or ignitable mixtures or where

combustible dust or easily ignitable particles or fibers

ICM-Munitions that embody a unique design to control

may be present.

the number, size, and distribution of fragments produced

when the item functions.

Hazardous Material-Any compound, mixture, element,

or assemblage or material which, because of inherent

Inert-Ammunition containing no explosives or chemical

characteristics, is dangerous to manufacture, process,

agents.

store, or handle.

Inert Area-Any area other than an explosives or

High Explosive Equivalent or Explosive Equivalent-The

ammunition area within an establishment.

amount of a standard explosive which, when detonated,

will produce a blast effect comparable to that which

Inert Components-Ammunition parts which contain no

results at the same distance from the detonation or

explosives or chemical agents.

explosion of a given amount of the material for which

performance is being evaluated. It is usually expressed

Inhabited Building-Any building or structure, other than

as a percentage of the total net weight of all reactive

an operating building, magazine or auxiliary building,

materials contained in the item or system. For the

occupied in whole or part as a habitation for human

purpose of these standards, TNT is used for

beings, or a building, structure or area where people are

comparison.

accustomed to assemble, such as a church,

schoolhouse, railroad station, and similar transportation

High Explosives Equivalent or TNT Explosives Equiv-

facilities, store, theater, or factory, both within and

alent - Deleted

outside Government establishments.

Land outside

boundaries of establishments will be considered

possible sites of inhabited buildings.

Holding Area--That area established, within a site, for

temporary storage of munitions to be destroyed,

Change 1 B-5