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Home > INDUSTRY NEWS

The most severe external wall thermal insulation material in gansu combustion performance specification

Time:2017-02-17

In order to ensure fire safety of construction projects, effectively prevent and reduce fire accident building external wall thermal insulation material, according to the relevant technical standards and the ministry of public security for civil building external thermal insulation materials on the fire supervision and management of the relevant matters notice (male away [2012] no. 2012), combining the reality of gansu province, housing and construction department of gansu province, gansu province public security department has been formulated and issued a notice about standard of building external wall thermal insulation material combustion performance. In the notice requirements of ordinary of polystyrene, extruded board shall not be used for civil construction.


According to the notice spirit, the construction curtain wall type, when the building height is greater than or equal to 50 meters, the combustion performance of external wall thermal insulation material shall be the A grade; Building height is greater than or equal to 24 m, less than 50 meters, the combustion performance of insulation materials should not be lower than B1 level. When B1 level material is used, should be set fire belt in each layer. At the same time, should use noncombustible material protective layer, building the first protective layer thickness should not less than 10 mm, other floor should not be less than 5 mm. Building height less than 24 meters, the combustion performance of insulation materials should not be lower than B1 level. When B1 level material is used, should be every two layer set fire belt. At the same time, should use noncombustible material protective layer, building the first protective layer thickness should not less than 10 mm, other floor should not be less than 5 mm. Kindergartens, hospitals, nursing homes, dormitories, hotels, shopping malls and personnel intensive place, the combustion performance of insulation materials shall be the A level. For curtain wall construction, when the building height is greater than or equal to 24 meters, the combustion performance of insulation materials shall be the A level; Building height is not more than 24 meters, the combustion performance of insulation materials should not be lower than B1 level.


Building an inner wall thermal insulation system, shall meet the following requirements: crowded places and all kinds of building evacuation stair, the combustion performance of insulation materials shall be the A level; Buildings, sites or other parts, should use low smoke, low toxic and B1 level is not lower than the combustion performance of thermal insulation material. Using B1 level material, should use noncombustible material protective layer, and the protective layer thickness is not less than 10 mm. Fire belt combustion performance should be adopted as A level of inorganic heat preservation material, and along the floor position setting, the width is not less than 300 mm. Fire belt and grassroots metope should be the whole area of paste, and should be with the exterior wall insulation construction at the same time. In order to ensure the stability and safety in the process of exterior wall thermal insulation material in use, organic thermal insulation material of smoke toxicity safety requirement to quasi ZA1 level; Heat preservation material bibulous rate is not greater than 4%; Organic class or classes of modified heat preservation material its bulk density is not greater than 60 kg/m3. It is forbidden to use in gansu province and the existing national standards are not complied with or without product standards of exterior wall thermal insulation material.