Additional requirements for cold storage

For cold storage of organic peroxides the following additional requirements must be observed:

• Walls and roof should be insulated. The insulation should be non-flammable or flame-retardant.
• To avoid absorption of moisture and to retain the insulating properties, non-absorbent material (closed cell structure) should be used. Moreover the material should preferably be resistant to the solvents used in the product to be stored. If the insulating material is not solvent resistant it should be covered with cladding material.
• Any equipment, including the cooling unit, that may generate heat or sparks should be located outside the storage building, away from the entrance so as to reduce the electrical requirements (if all wall ducts are air tight).
• Any electrical equipment having direct communication with the inside air should be explosion proof.
• The cooling agent should be non-flammable and non-reducing. Liquid air in unsuitable.
• Moving parts and openings should be protected from being icebound by atmospheric moisture.
• In contrast to non-cooled storage, there should be no ventilation openings in doors or wall. If fresh air ventilation is desired, the following items should be considered:
  • The replacement rate should be minimum
  • The outside air intake must not be allowed to warm up  the stored products
• If a sprinkler or deluge system is used, it should be a dry type system.