Ventilation engineering Problems that should be paid attention to when the air duct is installed during construction
1. The air ducts installed during the construction of ventilation works shall be smooth and clean, and outdoor air ducts shall be provided with rain and snow proof measures.
2. When the air duct extends into the structural air duct, the steel mesh shall be installed at its end to prevent sundries from entering the metal air duct during system operation. The gap between metal air duct and structural air duct shall be sealed tightly.
3. When the air duct passes through the settlement joint, the casing shall be added according to the design requirements, and the gap between the casing and the air duct shall be tightly sealed with filler (soft).
4、 Ventilation pipe construction When transporting and installing stainless steel and aluminum air ducts, avoid scratching the surface. During installation, try to reduce the contact with iron objects.
5. When transporting and installing valve parts, avoid surface and blade deformation due to collision. Rain and snow prevention measures shall be taken for outdoor stacking.
Reasonable air duct sealing method
Correct sealing method of metal air duct:
1. The air duct shall be sealed mainly by plate connection; Other sealing methods are only auxiliary means;
2. Sealant caulking cannot be used as the general method for sealing metal air duct; It is only applicable to the remediation of leakage points reinforced by air ducts and Common plate flange Four corner seal;
3. Sealant and other methods can be used for sealing; Sealant caulking is only one of the secondary sealing methods, not the only sealing method. There are other sealing methods (including solder sealing);
4. The performance of sealant used for metal air duct caulking shall meet the requirements of use environment;
5. No matter what secondary method is used, ensure that the sealing surface is on the positive pressure side.
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