The introduction of new standards from international and national standards in some of the non-insulated fire door and fire door concepts and requirements, classification fire doors from the original only by fire door classification, instead by fire door ( A class), part of the fire door (Class B) and non-insulated fire doors (class C) are classified; at the same time, the original A, B, Class C fire doors fireproof limit adjusted to 1.5h, 1.0h, 0.5h, enriched the type of fire doors, increasing the choice of practical application, the need for only a portion of the fire door applications have insulation or fire integrity requirements, you can use part of the insulation or insulated fire doors . At the same time, the new standard also increased the steel wooden soundproof doors and other materials fire doors content and requirements for new materials, new technology applications and new fire doors production, testing provides a technical basis, expanding the fire door production enterprise development space . Plan issued in accordance with national standards, will GB12955-91 "steel fire door general technical conditions" and GB14101-93 "wooden fire door general technical conditions" integration amendments to harmonizing technical requirements soundproof doors. Our fire door industry after ten years of development, product quality and performance has been greatly improved, the product range has also increased, the original standard was not applicable to direct the production, quality supervision and inspection. Tianjin Fire Research Institute of Ministry of Public Security in the revision process, the reference standards and international standards in developed countries, combined with our fire doors production, installation and usage, in-depth investigation, analysis and research. These provisions, is not only a more reasonable set of fire doors and fire doors to reduce the cost of production and raw material consumption, in line with the requirements of environmental protection and the construction of a conservation-oriented society. ? A class totally insulated fire doors, also known as fire doors, within a specified period of time to meet the fire insulation and fire integrity requirements, fire resistance rating were 0.5h (Class C), 1.0h (as well), 1.5 h (Class A) and 2.0h3.0h. ? Class B fire doors, also known as part of the fire door, the fire insulation requirements 0.5h, fire integrity rating was 1.0h, 1.5h, 2.0h, 3.0h. ? Class C fire doors known as non-acoustic fire doors, fire insulation does not require it, within a specified time to meet fire resistance requirements for fire integrity only fire integrity rating was 1.0h, 1.5h, 2.0h , 3.0h.