national standard
1. The building industry standard "Exhaust Ducts for Kitchen and Toilet" (JG/T 194-2006) promulgated by the Ministry of Construction is applicable to exhaust flues made of various raw materials.
2. The building materials industry standard "Glass Fiber Reinforced Cement Vent" (JC/T854—2008) promulgated by the National Development and Reform Commission is only applicable to the residential exhaust flue with sulphoaluminate cement and alkali-resistant glass fiber mesh.
3. Article 7.2.9 of the national standard "Code for Fire Protection Design of Buildings" (GB500 16—2006) stipulates that vertical tube wells for smoke exhaust, exhaust and garbage should be set independently; The shaft wall shall be incombustible, and the fire resistance limit shall not be lower than1.00h.
4. Article 9.4.3 of the National Standard Code for Residential Buildings (GB50368—2005) stipulates that the installation of vertical shafts in residential buildings should meet the following requirements: cable vertical shafts, pipe vertical shafts, smoke exhaust ducts and exhaust ducts should be set independently, and the walls of vertical shafts should be made of incombustible components with fire resistance not less than1.00h. ..
5. On February 23rd, 2006, a fire broke out in Building 14, Guoruicheng Community, Chongwen District, Beijing. The fire originated from a resident on this floor who caught fire because of the leakage of kitchen appliances. After the fire, a large amount of smoke spread to other upper and lower floors along the exhaust duct, causing fire accidents. The cause of the accident is that the fire resistance of the central exhaust duct in the residential kitchen can not meet the requirements of the national standard. On June 3, 2009, the smoke exhaust pipe on the fourth floor of a high-rise building at the intersection of Chongzhi Road and Jianhe Street in Changchun City caught fire. The centralized smoke exhaust duct of residential buildings has gradually become a fire hazard due to the long-term accumulation of oil pollution. At present, most of the smoke exhaust pipes are combined variable-pressure high-strength fire-resistant smoke exhaust pipes (patent number: ZL200820064055.9), which are formed by mechanically assembling inorganic fire-resistant flue plates by applying the patented new technology of Jiangsu Zitai Institute of Building Technology. In addition, the patented variable pressure air extraction module developed by Zitai Institute of Building Technology is installed in the flue to eliminate the smoke smell problem (patent numbers: 20 10206862 10.8 and 20 102068 142.5), and it must conform to the national standard "Fire Test Method for Ventilation Pipes GB".