2022.11.01
According to the current “Classification Method of Building Materials Incineration Function”, A-level thermal insulation materials are non-combustible materials and belong to inorganic thermal insulation materials.
However, as far as the market is concerned, there are very few A-level insulation materials, only a few kinds of rock wool boards, foam glass, and vitrified microbeads.
But compared with A-level insulation materials, organic insulation materials. This kind of thermal insulation material, which is characterized as B grade by the fireproof insulation board machine, is divided into three grades, B1 grade is flame retardant, B2 grade is flammable, and B3 grade is flammable.
Class B1
The flame-retardant thermal insulation material is determined according to the fire resistance limit of the material. In addition, the material distinction of different parts is also different! Compared with the common ones, such as EPS/XPS insulation boards with flame retardants added through special treatment.
Level B2
Combustible thermal insulation materials are mostly EPS expanded polystyrene foam thermal insulation boards and XPS extruded plastic boards, which are also commonly referred to as ordinary boards. This material has a low flash point and releases many harmful gases during incineration.
Level B3
Flammable thermal insulation materials, which are mostly polystyrene foam-based thermal insulation materials, are now selected as external wall thermal insulation materials because they are easy to burn.
For civil building insulation materials, rock wool boards are the first choice for building external insulation materials that are popular in the Chinese market.
“Document No. 65” is clear: “Before the new standards and regulations are released, in order to curb the high incidence of fires caused by flammable and combustible external thermal insulation materials in buildings at that time, the external thermal insulation materials of civil buildings will be included in the construction project fire protection planning review, fire inspection and record keeping. Scope of random inspection. For all civil buildings with external thermal insulation materials within the scope of fire protection planning review and fire inspection of construction projects, the incineration function of building external thermal insulation materials should be included in the review and inspection content. will fail the fire inspection.
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