The zinc coating of galvanized air ducts can significantly improve their protective and decorative properties after passivation, dyeing, or coating with protective agents. Moreover, the fireproof function of galvanized air ducts is primarily reflected in their non combustible properties. However, it is important to note that whether the insulation layer burns depends on the material used. The fire resistance performance of galvanized air duct manufacturers can be reflected in many aspects. Similarly, when using galvanized air ducts, there is no good noise reduction function. Therefore, we need to add a muffler to the air duct, and its thermal conductivity is too high, so there is no insulation function. Therefore, we also need to add an additional insulation layer when using it, which has requirements for the application environment.

镀锌铁皮风管正确吊装的技术，然后在依据图纸铁皮风管各体系的分布，依照制造好的铁皮风管编号进行摆放、组合，核对镀锌铁皮风管尺度，所在轴线方位契合图纸后，方可吊装。镀锌铁皮风管加固措施：矩形风管边长≥630mm和保温风管边长≥800mm,管段长度在1.2m以上必须采用加强筋或其它加固。

The correct lifting technique for galvanized iron sheet air ducts is to place and combine them according to the distribution of each system of the galvanized iron sheet air duct according to the drawings and the manufactured iron sheet air duct number. The dimensions of the galvanized iron sheet air duct should be checked and the axis orientation should match the drawings before lifting. Reinforcement measures for galvanized iron sheet air ducts: rectangular air ducts with a side length of ≥ 630mm and insulated air ducts with a side length of ≥ 800mm must be reinforced with reinforcing bars or other reinforcement measures when the length of the duct section is greater than 1.2m.

防止镀锌风管震动和噪音的方法。防止震动和噪音是安裝全过程中的关键步骤。安裝全过程中，镀锌风管的震动和噪音防止主要从以下几个方面入手:

Methods to prevent vibration and noise from galvanized air ducts. Preventing vibration and noise is a key step in the entire installation process. During the entire installation process, the vibration and noise prevention of galvanized air ducts mainly starts from the following aspects:

①风扇安裝时，应根据设计要求或施工规范设置减振装置。

① When installing fans, vibration reduction devices should be installed according to design requirements or construction specifications.

②风机和镀锌风管的联接采用软管联接，风机吸入口处的软管安裝应适度松紧，避免因软接过松而降低进出风口面积而产生噪音和震动。防止镀锌风管震动和噪音的方法。

② The connection between the fan and the galvanized air duct adopts a flexible hose connection, and the installation of the flexible hose at the fan suction port should be moderately loose to avoid noise and vibration caused by the reduction of the inlet and outlet area due to loose soft connections. Methods to prevent vibration and noise from galvanized air ducts.

③镀锌风管制造、安裝和与部件联接，联接严密，无漏风现象，避免漏风噪音。

③ Galvanized air duct manufacturing, installation, and connection with components, tightly connected, without air leakage, to avoid air leakage noise.

④为了防止镀锌风管震动，在各系统镀锌风管的转弯处，与通风机和风口的连接处设置固定支架。镀锌风管漏风量测试镀锌风管安裝后，需要进行漏风量测试。根据规范，镀锌风管的漏风量测试采用漏光法定性和漏风量测试定量测试相结合的方式，适用于中低压系统的严密性测试；漏风量测试适用于中压系统的抽检和高压系统的全部检测。防止镀锌风管震动和噪音的方法。

④ In order to prevent vibration of the galvanized air duct, fixed brackets are installed at the corners of the galvanized air duct in each system, and at the connection between the ventilation fan and the air outlet. After the installation of galvanized air duct, air leakage testing is required. According to the regulations, the leakage test of galvanized air ducts adopts a combination of light leak detection and quantitative leakage test, which is suitable for the tightness test of medium and low voltage systems; The air leakage test is applicable to the sampling inspection of medium voltage systems and all inspections of high voltage systems. Methods to prevent vibration and noise from galvanized air ducts.

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