外墙保温材料的防火等级划分外墙保温材料的防火等级划分外墙保温材料的防火等级划分外墙保温材料的防火等级划分
Fire Classification of External Wall Thermal Insulation Material Fire Classification of External Wall Thermal Insulation Material Fire Classification of External Wall Thermal Insulation Material Fire Classification of External Wall Thermal Insulation Material
1、我国国家标准GB8624-97将建筑材料的燃烧性能分为以下几种等级
1. Our national standard GB8624-97 classifies the combustion performance of building materials into the following grades
A级：不燃性建筑材料：几乎不发生燃烧的无机材料。
Class A: Non-combustible building materials: inorganic materials that hardly burn.
B1级：难燃性建筑材料：难燃类材料有较好的阻燃作用。其在空气中遇明火或在高温作用下难起火，不易很快发生蔓延。
Class B1: Flame-retardant building materials: Flame-retardant materials have better flame-retardant effect. It is difficult to catch fire in the air or under the action of high temperature, so it is not easy to spread quickly.
B2级：可燃性建筑材料：可燃类材料有一定的阻燃作用。在空气中遇明火或在高温作用下会立即起火燃烧，易导致火灾的蔓延，如木柱、木屋架、木梁、木楼梯等。
Class B2: Flammable building materials: Flammable materials have a certain flame retardant effect. When exposed to open fire in the air or under the action of high temperature, it will ignite immediately, which will easily lead to the spread of fire, such as wooden columns, wooden roof trusses, wooden beams, wooden staircases and so on.
B3级：易燃性建筑材料：无任何阻燃效果，极易燃烧，火灾危险性很大。
Class B3: Flammable building materials: no flame retardant effect, extremely flammable, fire hazard is very high.
2、外墙保温材料可根据防火等级进行划分
2. External wall insulation materials can be classified according to fire protection grade.
1. 燃烧性能为A级的保温材料：
1. Thermal insulation material with A-grade combustion performance:
无机保温材料、岩棉、玻璃棉、泡沫玻璃、泡沫陶瓷、发泡水泥等
Inorganic insulation materials, rock wool, glass wool, foam glass, foam ceramics, foamed cement and so on.
2. 燃烧性能为B1级的保温材料：
2. Thermal insulation material with combustion performance of B1 grade:
特殊处理后的挤塑聚苯板(XPS)/特殊处理后的聚氨酯(PU)、酚醛、胶粉聚苯粒等
Extruded Polyphenyl Sheet (XPS)/Polyurethane (PU), Phenolic Aldehyde, Rubber Powder Polyphenyl Particles etc. after Special Treatment
3. 燃烧性能为B2级的保温材料：
3. Thermal insulation material with combustion performance of B2 grade:
模塑聚苯板(EPS)、挤塑聚苯板(XPS)、聚氨酯(PU)、聚乙烯(PE)等
Molded Polystyrene Sheet (EPS), Extruded Polystyrene Sheet (XPS), Polyurethane (PU), Polyethylene (PE), etc.