The ventilation pipe manufacturer stated that the provisions for the connection of metal air ducts include: the seam of the air duct plate splicing should be staggered, and there should be no cross seam; When the air duct is connected by flange, if the flange material specification and bolt specification are higher than the specification, the material will be wasted to a certain extent. If the flange material specification and bolt specification are lower than the specification, the tightness and strength of the connection will be difficult to be guaranteed, and the material specification used should comply with the relevant provisions.
There are four main connection methods for metal air ducts, namely, hoop type connection, hoop type connection, strip type connection and hose type connection. The hoop type is used for the connection of round ventilation ducts and spiral ventilation ducts, the hoop type is used for circular and rectangular connection, the strip type is used for rectangular connection, and the hose type is used for the connection between air ducts and components.
Attention shall be paid to the connection of metal air duct. 1. When connecting components and equipment to the load air duct, separate supports and hangers must be installed. The supports and hangers cannot be used as hangers for air ducts, and the distance from the exhaust, air valve and automatic control mechanism is greater than 200 mm.
2. The air duct shall be installed vertically, the distance between supports shall not exceed 2.4m, the number of supports on each riser shall be at least 2, and the contact area between supports and air duct shall be increased appropriately. 3. If the length of the horizontally suspended main air duct exceeds 20m, anti shake fixing brackets shall be installed, two for each system.
4. The manufacturer of the ventilation pipe said that the pipe between the air pipe and the air pipe is connected by a special flange connector. After the plug-in is inserted, the remaining holes on the four corners of the air pipe are tightly sealed with sealant, and these corners are installed. 5. When connecting the composite air pipe and flange valve parts, equipment, etc., please use F or 4 type special joints that meet the required strength, and use gaskets with good sealing performance and high flexibility between the joints and flanges. The connecting part and flange shall be flat without defects and obvious deformation. The clearance between fixing bolts shall not exceed 100mm. Four corners of the flange shall have bolt holes.
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