MIL-HDBK-1032/2
Segregation of Materials. Provide separate storage areas for
4.2
materials having incompatible hazardous characteristics.
4.2.1
Categories of Materials. Normally, six categories of flammable/
hazardous materials must be accommodated and provided segregated storage areas
within a flammable/hazardous storage facility. Other categories may be
encountered in some designs and require an additional segregated storage
areas. These materials consist of the following:
4.2.1.1
Flammable and Combustible Liquids. Liquids are defined by NFPA 30
as any material having a fluidity greater than 300 penetration asphalt, when
tested in accordance with Test for Penetration for Bituminous Materials,
ASTM D-5-78.
Flammable liquids have a flash point below 100F (38C) and a vapor
pressure not exceeding 40 psi absolute (275 kPa) at 100F (38C). These
liquids are also classified as Class I liquids.
Combustible liquids have a flash point of 100F (38C) or higher.
Combustible liquids are further classified as Class II for flash points at or
above 100F (38C) and below 140F (60C), and Class III for flash points at
or above 140F (60C).
4.2.1.2
Acids. Acids and acid mists and gases react with arsenides,
borides, carbides, cyanides, fluorides, phosphides, selenides, silicides,
sulfides, sulfites, and tellurides to generate toxic fumes. They also
liberate hydrogen upon contact with metals and hydrides.
Oxidizers. Oxidizing materials are those chemicals which will
4.2.1.3
decompose readily under certain conditions to yield oxygen. They may cause a
fire in contact with combustible materials, may react violently with water,
and when involved in a fire may react violently. Typical oxidizers include:
organic and inorganic peroxides, permanganates, chlorates, perchlorates,
persulfates, organic and inorganic nitrates, bromates, perbromates, chromates,
and dichromates.
4.2.1.4
Poisons. Poisons are materials that cause death by systemic
poisoning rather than by corrosive destruction of tissue. Under adverse
conditions, such as a leak, spill, fire, or poor ventilation, a common
chemical or compound (e.g., ammonia) may be considered poisonous.
Water Reactive Materials. These materials react with water, steam,
4.2.1.5
or water solutions to produce flammable gases, toxic gases, explosive gases,
or heat. Flammable gas producers include calcium, cobalt, hydrides, lithium,
potassium, rubidium alloys, and sodium. Explosive gas producers include
arsenides, borides, carbides, nitrides, phosphides, selenides, silicides,
sulfides, and tellurides. Heat producers include acid anhydrides,
concentrated acids, and concentrated alkalies. It is essential that NO
water-based fire extinguishment system be used in storage areas designated for
water reactive materials. Carbon dioxide or Halon systems are acceptable.
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