Phenolic insulation board fire rating

Phenolic insulation board material belongs to Class B1, which is used in the building insulation industry. It is nonflammable in case of open fire, low smoke, non-toxic, and free of drips. It can fundamentally eliminate the possibility of external insulation fire. The use temperature range is – 250 ℃~150 ℃. Therefore, the fire rating of phenolic board can reach *.
In the market, the fire rating of phenolic insulation board is generally A2 and B1. In order to facilitate the purchase, according to national regulations, it has five fire ratings:
Grade A1: incombustible, without any harmful gas and smoke;
Grade A2: incombustible, but not combustible, which will produce certain harmful gases;
Class B1: high ignition point, difficult to burn;
Class B2: non combustible;
Class B3: flammable;
Because of the excellent fire rating of phenolic board, it is widely used in the field of external wall insulation in China, and has held about 50% of the total in the organic insulation market. In foreign countries, it is also widely used. In Britain, Western Europe, the Middle East and other regions, it is stipulated that phenolic foam insulation materials should be preferentially used for new projects; The construction departments in France and Northern Europe believe that phenolic panels have good fire resistance; Phenolic panels are widely used in various buildings in Russia, Eastern Europe and other regions; 40% of the fireproof, thermal insulation and sound insulation materials in the United States are phenolic resin; Japan even issued the decree of “Phenolic foam plastic as standard building fire-resistant material” and so on.
After the phenolic foam material is compounded with other materials, it can achieve better fireproof, thermal insulation and heat insulation effects. According to the requirements of different construction scenarios, the phenolic foam insulation board can be compounded with embossed aluminum foil, color steel, glass fiber, cement-based fiber paper, etc., and the strength page is greatly improved.