专注通风管道加工·排烟罩

1. The surface of the ventilation duct is coated with a thin layer of zinc, which is immersed in a molten zinc bath. At present, the main production method is continuous galvanizing, which involves immersing the coils in a molten zinc plating bath to make galvanized sheet air ducts;

2、合金化镀锌风管。这种也是用热浸法制造，但在出槽后，立即把它加热到500℃左右，使其生成锌和铁的合金被膜。这种镀锌板具有良好的涂料的密着性和焊接性；

2. Alloyed galvanized air duct. This type is also manufactured using the hot dip method, but immediately after leaving the tank, it is heated to around 500 ℃ to form an alloy coating of zinc and iron. This galvanized sheet has good coating adhesion and weldability;

3、电镀锌板风管。用电镀法制造这种镀锌具有良好的加工性，但镀层较薄，耐腐蚀性不如热浸法镀锌板；

3. Galvanized sheet air duct. The use of electroplating method to manufacture this type of zinc plating has good processability, but the coating is thinner and the corrosion resistance is not as good as that of hot-dip galvanized sheet;

4、单面镀和双面差镀锌风管。单面镀锌板风管，即只在一面镀锌的产品。在焊接、涂装、防锈处理、加工等方面，具有比双面镀锌板风管好的适应性。为克服单面未涂锌的缺点，又有一种在另面涂以薄层锌的镀锌板，即双面差镀锌板；镀锌风管

4. Single sided and double sided galvanized air ducts. Single sided galvanized sheet air duct, which refers to products that are only galvanized on one side. In terms of welding, painting, rust prevention treatment, processing, etc., it has better adaptability than double-sided galvanized sheet air ducts. To overcome the disadvantage of not coating zinc on one side, there is another type of galvanized sheet coated with a thin layer of zinc on the other side, namely double-sided differential galvanized sheet; Galvanized air duct

5、合金、复合镀锌风管，它是用锌和其他金属如铅、锌制成合金乃复合镀成的风管。这种镀锌风管既具有的防锈性能，又有良好的涂装性能。

5. Alloy and composite galvanized air duct, which is made of zinc and other metals such as lead and zinc, and even composite plated air duct. This type of galvanized air duct has both rust prevention performance and good coating performance.

（一）防火风管的本体、框架与牢固质料、密封垫料必须为不燃质料，其耐火等级应切合计划的划定。

（1） The body, frame, and solid materials, as well as sealing gasket materials of the fire resistant air duct must be non combustible materials, and their fire resistance rating should be in accordance with the plan.

（二）镀锌或彩色涂层的拼接，应接纳咬接或铆接，且不得有十字型拼接缝。彩色涂层的塗塑面应设在风管内侧，加工时应克制破坏涂塑层，破坏的部门应举行修补。

（2） The splicing of galvanized or colored coatings should accept biting or riveting, and there should be no cross shaped splicing joints. The plastic coating surface of the color coating should be located on the inner side of the air duct. During processing, damage to the plastic coating layer should be restrained, and the damaged department should be repaired.

（三）焊接风管可接纳搭接、角接和对接三种情势，风管焊接前应除锈、除油。焊缝应融合良好、平整，外貌不应有裂纹、焊瘤、穿透的夹渣友好孔等缺陷，焊后的板材变形应改正，焊渣及飞溅物应打扫干净。

（3） Welding of air ducts can accept three types of situations: overlap, corner joint, and butt joint. Before welding of air ducts, rust and oil should be removed. The welding seam should be well fused and flat, and there should be no defects such as cracks, overlap, penetrating slag friendly holes in the appearance. The deformation of the welded plate should be corrected, and the welding slag and splashes should be cleaned up.

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