Fabrication and installation method of ventilation duct:
1. For the preparation of pipeline installation, the dust shall be removed before the installation of the pipeline to ensure that the internal and external surfaces of the pipeline are clean. The flatness and levelness of the pipeline shall be checked before installation. The pipeline can be installed only after it is approved by the supervisor or Party A and relevant acceptance data are filled in. Before pipe hoisting, the position, size and elevation of the reserved holes in the site structure shall be checked, and the inside and outside of the air duct shall be wiped clean to prevent the obstacles in the garbage pipeline and the installation part from being cleaned.
2. Installation methods and requirements of ventilation pipes and components
Removable interfaces of pipes and fittings shall not be installed in walls and walkway floors. The position of embedded parts or expansion bolts of supports, hangers and brackets shall be accurate, firm and reliable. The embedded parts shall not be painted, and the oil stain shall be removed. There are no design requirements for the spacing of non insulated supports, hangers and brackets, and the following shall be followed. Horizontal installation: the diameter or large side length of air duct is less than 40mm, and the spacing is < = 4m; If it is greater than or equal to 400mm, the spacing is ≤ 3M. Vertical installation: the spacing is < = 4m, but the fixed parts of each riser shall be greater than or equal to 2. The insulation pipe shall meet the design requirements. The support, hanger and bracket shall not be set outside the air outlet, valve and inspection door. The hanger shall not be directly hung on the flange, and fixed points to prevent swing shall be set at appropriate places. The installation of fire damper, electric air valve and other components shall be separately provided with lifting support.
The thickness of flange gasket is 3-5mm, and the plastic shall not protrude into the pipe. Bolts connecting flanges. The nut shall be on the same side and the material shall be in accordance with the design requirements. The air duct shall be installed horizontally, the levelness shall be < = 3 / 1000, and the total deviation shall be < = 20mm. The air duct shall be installed vertically, the perpendicularity shall be < = 2 / 1000, and the total deviation shall be < = 20mm. The air duct out of the wall of civil air defense shall be sloped according to the requirements of civil air defense. The valve regulating Department of the air duct shall be installed at the position convenient for operation, the valve plate shall be inserted along the air flow direction, the installation position of the fire damper shall be correct, and the fusible parts shall be installed after the installation of the system. The installation of various air outlets shall be flat and accurate. The transfer part shall be flexible and firmly connected with the air duct. The flexible short pipe shall be installed with proper tightness and shall not be twisted.
Through the above introduction, I believe you have some solutions for the installation of ventilation pipes. Chongqing Kexin ventilation equipment Co., Ltd. should pay attention to selecting a regular company when purchasing. In addition, during installation, we must understand the requirements and installation methods, so as to better operate and ensure the quality of the project.
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