Nowadays, the application of ventilation pipes is more and more common, so there are various materials of ventilation pipes in the market. What are the types of ventilation pipes? Next, Shandong ventilation pipe processing personnel will tell you.
1. Sheet steel air duct. The ventilation pipe is made of thin steel plate, and the low-carbon steel plate is suitable, and the cold-rolled steel plate is suitable for ventilation and air conditioning engineering. The thin steel sheet air duct with a thickness of less than 1.2mm is connected by undercut, and the air duct with a thickness of less than 2mm is welded. According to relevant regulations, when the side length of rectangular air duct is ≥ 630mm and the side length of thermal insulation air duct is ≥ 800mm, the reinforcement measures shall be taken for the steel sheet air duct and galvanized steel sheet air duct with the length of pipe section above 1.2mm. Generally, angle steel is used to reinforce the air duct, and some reinforcement methods such as lifting joint (vertical bite) or rolling groove and pressing out convex edge on the air duct wall are used. Generally, angle steel or flat steel flange is used to connect the air duct and the air duct.
2. Galvanized steel air duct. During the construction of galvanized steel plate, attention shall be paid to ensure that the galvanized layer is not damaged, and undercut and riveting shall be adopted.
3. Stainless steel plate air duct. During processing, scratches, scratches, dents and other defects on the surface of the plate shall be prevented, and hammers shall not be used to avoid damaging the crystal structure of the alloy elements, otherwise the corrosion center will appear at the place struck by the hammer. Stainless steel has high strength and good elasticity. When the pipe wall thickness is greater than 0.8mm, welding is generally used. When the thickness is less than 0.8mm, bite connection is used. The flanges used for the connection of stainless steel air pipes are generally cut into strips. The rectangular flanges can be welded according to the size, and the circular flanges are processed by cold bending.
It is made of galvanized steel sheet, which is not easy to rust, has the functions of heat preservation and noise elimination, and has the characteristics of long production and installation cycle. Galvanized air duct is especially suitable for conveying general gas with low moisture content. For galvanized air duct, it can be well used in many occasions such as supply and return air duct of purification system, ventilation duct of central air conditioning, industrial supply and exhaust air duct, suction and exhaust air duct of environmental protection system, mine drainage gas duct, mine coated cloth air duct, etc. due to its good fire performance.
We should know that the zinc coating of galvanized air duct can significantly improve its protection and decoration after passivation, dyeing or coating with light protecting agent. Moreover, the fire protection performance of galvanized air duct is mainly reflected in its incombustibility. However, it should be noted that whether its insulation layer is burnt depends on the material. We suggest that the material of galvanized air duct should be non combustible insulation materials such as centrifugal glass wool.
In short, the properties of air ducts made of different materials are different. As the selection of materials is related to the quality of the project and the convenience of equipment maintenance in the later stage, it must be carefully considered when selecting. Come to our website for more information http://www.jnqsg.com Let's see.