Article 9.4.3 of the national standard Code for Residential Buildings (GB 50368—2005) stipulates that the installation of vertical shafts in residential buildings should meet the following requirements: cable vertical shafts, pipeline vertical shafts, smoke exhaust ducts, exhaust ducts, etc. Should be set independently, and the shaft wall should be made of incombustible components with fire resistance not less than1.00h h.
The cement flue in the market can't meet the requirements of the national standards "JGT 194-2006" and "JCT 854-2008" issued by the Ministry of Construction and the National Development and Reform Commission, and two important indexes of cement flue products are difficult to meet the standard requirements. When there is a fire in the kitchen, the cement flue is easily burned, which will cause serious damage to the renovated kitchen and cause great hidden dangers to people's life and property safety and public interests. Shanghai 1 1. 15 Fire fighting has sounded the alarm of residential fire hazards!
Most of the flue pipes are made of inorganic refractory flue plates, and the new patented technology of Jiangsu Zitai Institute of Building Technology (patent number: ZL 20112007302.5438+0) is applied. In addition, the patented variable pressure air extraction module developed by Zijinshan Institute of Building Technology is installed in the flue to eliminate the smoke smell problem (patent numbers: ZL 20 10206862 10.8, ZL 20 102068 142.5), and it must meet the national standard "Fire resistance of ventilation pipes" Combined variable pressure high strength fire-resistant smoke exhaust pipeline is a new type of high strength variable pressure fire-resistant smoke exhaust pipeline.