Flame Retardant Grade of Thermal Insulation Material Should Meet Standard and Specification Requirements
- time:
- 2019-05-11
According to the current national standard GB8624, building materials and products are classified into grade A non-combustible materials (and products), grade B1 non-combustible materials (and products), grade B2 combustible materials (and products), and grade B3 combustible materials (and products).
The burning performance grade of thermal insulation materials should meet the design requirements. The thermal insulation materials selected in the design should not only meet the thermal performance requirements, but also meet the fire protection design requirements. In order to avoid fire, the current national standard GB8624 not only stipulates the classification method of combustion performance of thermal insulation materials, but also requires oxygen index of foam plastics and other thermal insulation materials: oxygen index value of grade B1 is more than 30%; according to the current national standard, determination of combustion behavior of plastics by oxygen index method Part 2: room temperature test GB /T2406.2.
A large number of oxygen index verification tests show that the oxygen index of B1 grade polyurethane and EPS insulation materials can basically reach 30, and XPS insulation materials need to take appropriate measures to achieve. Table 1 shows the results of combustion performance and oxygen index test of several typical insulation materials in the market.
The thermal insulation material not only meets the combustion performance, but also its physical and chemical properties must meet the design requirements. The density, thickness, strength, thermal conductivity and other performance indicators of thermal insulation materials are the key factors related to their thermal insulation effect. These properties should meet the requirements of the corresponding standards, including product standards, design acceptance criteria and so on.
