Organic Peroxides cont'd

DOE-HDBK-1139/3-2005

Sources11

Consolidated Requirements12

4.5.3 Incompatible materials and flammable liquids shall not be stored

NFPA 432, 4.11.3.1

within 25 ft. of organic peroxide formulations in chemical storage

areas.

[NOTE: Organic peroxide formulations that are also classified

as flammable liquids may be stored with other organic peroxide

formulations.]

4.5.3.1 If a 25-foot separation cannot be maintained, then a 1-

NFPA 432, 4.11.3.2

hour, liquid-tight fire barrier shall be permitted.

4.5.4 Only closed containers shall be permitted in an organic peroxide

NFPA 432, 4.11.4

storage area.

4.5.5 Fifty-five-gallon drums of organic peroxide formulations shall

NFPA 432, 4.11.6

not be stacked.

4.5.6 Storage temperatures in chemical storage areas shall be

NFPA 432, 4.4.1

maintained within the recommended storage temperature range

for the materials being stored.29

4.5.6.1 High and low temperature switches, as applicable, shall

NFPA 432, 4.4.2

be provided in addition to normal temperature controls.

These switches shall actuate an alarm to ensure prompt

response.

4.5.6.2 Heating systems shall use low-pressure steam, hot water,

NFPA 432, 4.4.3

or indirectly heated air; cooling systems shall not use

direct expansion of a flammable gas.

4.5.6.3 Heating or cooling pipes and other heat transfer devices

NFPA 432, 4.4.4

shall not come into contact with organic peroxide

containers to cause their overheating or cooling.

4.5.7

Refrigerators used for storing organic peroxide formulations

NFPA 432, 4.5.2

shall be Class I, Group D, and Division I (i.e., "explosion-

proof", as defined in Article 500 of NFPA 70.

4.5.8

Unventilated, unrefrigerated storage cabinets used for the

NFPA 432, 4.5.3

storage of organic peroxides shall be considered Class I,

Division I as defined in Article 500 of NFPA 70.

4.5.9

Ventilated storage cabinets shall be considered Class I, Division

NFPA 432, 4.5.4

II as defined in Article 500 of NFPA 70. Ventilation must be a

minimum of 1 cubic foot/minute/square foot of floor area.

Attention should be used to ensure that organic peroxides stored in direct sunlight are not heated above allowed temperatures

by radiant heating.