The national standard requires that the fire retardant rating of prefabricated cold storage panels for indoor use be B2.
Standard Basis: The national standard for the fire retardant rating of prefabricated cold storage panels for indoor use primarily references JBT-6527-2006, "Insulated Sandwich Panels for Modular Cold Storage." This standard specifies various performance indicators for insulated sandwich panels used in cold storage, including the fire retardant rating.
B2 Fire Retardant Requirements: A B2 fire retardant rating indicates that the material has certain fire retardant properties, slowing the spread of fire during combustion, but not completely stopping it. For prefabricated cold storage panels for indoor use, a B2 fire retardant rating is sufficient to meet basic fire safety requirements.
Higher Requirements from Some Companies: Although the national standard is B2, some companies, for higher safety considerations or specific industry needs, may require panels to reach a B1 fire retardant rating. A B1 fire retardant rating offers better fire retardant performance than a B2 rating, and can better prevent the spread of fire to a certain extent.
In summary, the flame retardant rating of indoor prefabricated cold storage panels should meet the national standard B2. However, some companies or industries may propose higher flame retardant ratings, such as B1, based on actual needs.
