Introduction to general regulations for the production of ventilation ducts

General requirements for ventilation duct production? It can be said that each level has certain requirements, and it can also be mastered from the basic raw material level. Then you can take into account the detailed information on its installation and other aspects, and you must master the installation of ventilation ducts. Now, let’s take a look at Zhangjiagang Jinrong Ventilation and I believe it will help you to some extent. 1. Before the production of ventilation ducts, it is necessary to check whether the selected raw materials meet the relevant quality regulations, and whether there are compliance management qualification certificates or quality mark documents. In the absence of relevant documents, the court inspection shall meet the following requirements: (1) The surface layer of the selected board must be smooth and uniform in thickness, without cracks, sand holes, scars, edges and rust. (2) As far as this type of fabric air duct sheet is concerned, there must be no cracks, air bubbles, holes and other defects that endanger the quality of the fabric air duct sheet. (3) The selected other raw materials should not cause the compressive strength of the finished product to be reduced or endanger the high efficiency of its application due to defects. 2. For the ventilation duct pipe layer, the surface layer should be leveled, the arc shape should be well-proportioned, and the longitudinal seams should be overlapped. In addition, the occlusion of the teeth should also be close and the overall width should be symmetrical. The appearance of welding should be checked, and there should be no defects such as porosity, sand, slag, and cracks. 3. Regarding the production of metal material ventilation ducts and spare parts, the allowable error of the diameter or outer length of the ventilation duct is: -1mm for less than or equal to 300mm, -2mm for more than 300mm, in which the annular flange is The allowable error of the inner diameter or the inner side of the rectangular frame flange is +2mm, and the unevenness cannot exceed 2mm. 4. All right-angle turns in the air duct system software should be installed with sound-absorbing bends and galvanized iron sheet drainage sheets. 5. The insulation layer of the air duct must be made of polyethylene insulation foam board. The joint part of the edge of the thermal insulation layer should use a ladder or tongue and groove structure, and use epoxy resin to carry out adhesion. 6. The mechanical equipment selected for the air duct should be pressed groove, the air duct should be processed neatly and tightly, and the surface layer in the socket should be covered with structural glue. 7. For the tight connection between the air duct and the air outlet, a plastic hose with an insulating layer must be used for connection. To sum up, I firmly believe that everyone has a certain grasp of the production of ventilation ducts.

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