There are 4 main fire protection grades for polyurethane sandwich cold storage panels, and the paint performance requirements are as follows:

 

‌1. Grade A‌: non-flammable, non-combustible, and non-drip.

 

‌2. Grade B1‌: difficult to burn, non-combustible, and non-dripping sparks and molten droplets.

 

‌3. Grade B2‌: poor flammability, self-extinguishing after leaving the fire.

 

‌4. Grade B3‌: flammable material.

 

The impact of fire protection grade on the performance of cold storage panels

 

‌Grade A‌: has the highest fire protection performance, suitable for cold storage with extremely high fire protection requirements.

 

‌Grade B1‌: difficult to burn, suitable for cold storage with certain fire protection requirements.

 

‌Grade B2‌: flammable but self-extinguishing after leaving the fire, suitable for cold storage with general fire protection requirements.

 

‌Grade B3‌: flammable, currently not recommended for cold storage and most building materials scenarios.