Laiwu Fire Door Unlocking, Laiwu Fire Door Lock Monopoly, Laiwu Fire Door
The new standard introduces the concepts and requirements of partially insulated fire doors and non-insulated fire doors from international and foreign standards. The classification of fire doors is changed from the original classification of only insulated fire doors to the classification of completely insulated fire doors (Class A), partially insulated fire doors (Class B) and non-insulated fire doors (Class C). At the same time, the fire resistance limits of the original Class A, B and C fire doors are adjusted to 1.5h, 1.0h and 0.5h, which enriches the types of fire door products in China and increases the choice of practical application. For applications that only require partial thermal insulation or fire integrity requirements, partially insulated or non-insulated fire doors can be selected. The new version of the standard also stipulates that if the door leaf is filled with materials, it should use fire-proof and heat-insulating materials that are harmless to human body to reduce the impact on human health. These regulations not only make the setting of fire doors more reasonable, but also reduce the production cost and raw material consumption of fire doors, which meets the requirements of environmental protection and building an economical society. At the same time, the new standard also increases the contents and requirements of steel wood fire doors and other fire doors, which provides technical basis for the application of new materials and technologies and the production and inspection of new fire doors, and expands the development space of fire door manufacturers.