With the development of society, many kitchens in family residences emit fumes from their windows, which leads to cooking downstairs and smoking upstairs. Therefore, when family decoration, kitchen flue decoration is very important. Once unreasonable, it will form a bad taste phenomenon, which will have an impact on home life.
1) Ventilation Pipeline
The main body, structure, fixed data, sealing data and flexible joints of ventilation pipelines need to be manufactured with non-combustible data. When there are combustibles in the ceiling, the ventilation pipes in the ceiling should be insulated by non-incineration data, and should be not less than 150 mm apart from the combustibles.
2) Positive Pressure Air Supply Pipeline
The air supply pipeline should be manufactured with non-incineration data. When the metal duct is selected, the wind speed of the pipeline should not be greater than 20m/s, and when the non-metallic material duct such as smooth concrete with inner and outer surfaces is selected, it should not be greater than 15m/s.
Shandong Ventilation Pipeline
When the pressurized air duct passes through the area where fire is possible, the fire resistance limit of the air duct should not be less than 1h. The partition wall with fire resistance limit not less than LH should be selected for the air duct and the adjacent parts should be separated. When it is necessary to install an overhaul door on the wall, the third-class fire door should be selected.
3) Ventilation and air conditioning
Ventilation and air conditioning system pipes should be manufactured with non-combustible materials.
Shandong ventilation duct touches the air duct and flexible joint of corrosive medium, and can be manufactured with non-flammable materials. It is necessary for the cover data of composite data duct to be non-flammable. The insulation data of Shandong ventilation duct should be non-flammable or non-flammable grade B1 and harmless to human body.
What are the requirements for the manufacture and installation of ventilation ducts?
1) The distance should not be greater than 4 m when the diameter or length of the horizontal device is less than 400 mm, or less than 3 m when the diameter or length of the horizontal device is greater than or equal to 400 mm.
2) The air duct should be straight, and the distance should not be greater than 4m, but the fixed parts of each riser should not be less than 2.
2. The joint of rectangular air duct of mechanical smoke control and exhaust system should be sealed by biting method.
3. The allowable air leakage per unit area of air supply and ventilation pipes should conform to the rules of "Quality Inspection Standard for Ventilation and Air Conditioning Engineering Construction" GB5024 3. The air leakage allowed by the air supply pipeline should be determined according to the working pressure, and the ventilation pipeline should be determined according to the rules of medium pressure system.