Installation method of clean room duct
1. The position of the air duct and the parts and hangers, the projecting nails or the expansion bolts should be correct, firm and reliable, and the buried part should be removed from the oil and should not be painted.
2. If there is no design requirement for the metal duct support and hanger spacing, the corresponding support, hanger spacing and cross bracing specifications shall be met for the non-insulated air duct.
3. For the insulated metal air duct, the quality of the unit length of the air duct will be different due to the different insulation materials selected. When installing horizontally, the spacing between the support and the hanger should be in accordance with the design requirements. If there is no design requirement, the maximum spacing of the hangers can be set according to the standard when installed horizontally.
4. Appropriately increase the branch (hanging) at the elbow and tee.
5, the support, hanger can not be placed in the seal, damper, inspection door and measuring hole and other parts, affecting the use and viewing. The distance from the tuyere or the socket should not be less than 200mm.
6. When the length of the main and dry air ducts suspended horizontally exceeds 20m, fixed points for preventing swing should be set, and each system should be no less than one.
7. The connection of the duct should be straight and not twisted. When the surface of the surface mounted duct is installed horizontally, the allowable deviation of the level is 3/1000, and the total deviation should not exceed 20 mm. When the surface mounted duct is installed vertically, the allowable deviation of the verticality is 2/1000, and the total deviation should not exceed 20 mm. The position of the surface mounted duct should be correct and there is no obvious deviation.
8. When the air duct is connected with the air duct, the fastener nuts or screws of the same pipe section should be on the same side, and the galvanized gasket should be placed.
9, multi-leaf valve, butterfly valve, flapper valve and other adjustment devices should be installed in the easy to adjust the part.
10, hangers, brackets can not be directly in contact with the air duct, the middle should be padded with a strong insulation material, the thickness of the same insulation layer to prevent the creation of a cold bridge.
11. When the air duct is worn out of the roof, it should be fixed and equipped with a rain cover.
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