The support principle of the ventilation pipe installation and processing system is that the pipe should not be directly supported on the equipment with the valve, and the support or hanger should be set separately. The welding position of the pipe should be in the place where the construction is convenient or the stress is small, and the welding seam should not be located at the support and the distance should not be less than 200 mm.

不同含尘气体性质不同，则净化的分段处理应不同。通风管道加工系统布局中要保证整体系统的漏损小，确保吸尘口的有足够的风量。通风管道加工系统布局要减小阻力。圆形风管强度大耗材少，但加工工艺复杂些，占用空间大；不锈钢风管易布置，容易加工，因而使用较为普遍。山东通风管道还有系机械化生产由钢带螺旋绕制而成，有圆形、矩形，为节省空间，大量的不锈钢风管做成扁圆形。

If the properties of different dust gases are different, the purification process should be different. In the layout of the ventilation pipe processing system, the leakage of the whole system should be small, and the air volume at the suction port should be enough. The layout of ventilation pipe processing system should reduce the resistance. The circular duct has high strength and less consumables, but the processing technology is more complex and takes up more space; Stainless steel duct is easy to arrange and process, so it is widely used. Shandong ventilation pipe is also mechanized production, which is made of spiral steel strip, with round and rectangular shape. In order to save space, a large number of stainless steel air pipes are made into oblong shape.

风管商场上按材质一般分为三类：镀锌不锈钢风管、不锈钢不锈钢风管以及复合不锈钢风管。其中，不锈钢风管质量较好，适用性强，但价位高。现在商场上较广的不锈钢风管是镀锌板的。镀锌板不锈钢风管，基本是不锈钢不锈钢风管的特性，可是价位相对只要不锈钢风管的三分之二乃至更低。

According to the material, the air duct is generally divided into three categories: galvanized stainless steel air duct, stainless steel air duct and composite stainless steel air duct. Among them, the quality of stainless steel duct is better, the applicability is strong, but the price is high. The stainless steel air duct widely used in shopping malls is galvanized. Galvanized stainless steel duct is basically the characteristics of stainless steel duct, but the price is only two-thirds or even lower than that of stainless steel duct.

复合不锈钢风管一般运用在外界环境较为一般，对风管要求不太高的场所。因为铁皮容易在各种环境下发生化学反应，造成腐蚀、生锈。山东通风管道而锌在干燥的空气中几乎不发生变化。在潮湿的空气中，锌表面会生成细密的碱式碳酸锌膜。不锈钢风管主要是在风管铁皮上镀上一层锌，对铁皮起到保护的效果。锌镀层经钝化处理、染色或涂覆护光剂后，能显著进步其防护性和装饰性。

The composite stainless steel air duct is generally used in the places where the external environment is general and the requirements for the air duct are not too high. Because the iron sheet is easy to have chemical reaction in various environments, causing corrosion and rust. However, zinc in the dry air is almost unchanged. In humid air, a fine basic zinc carbonate film is formed on the surface of zinc. The stainless steel air duct is mainly plated with a layer of zinc on the iron sheet of the air duct to protect the iron sheet. The protective and decorative properties of zinc coating can be improved significantly after passivation, dyeing or coating with light protecting agent.

济南通风管道由保温层双面复合保护层制作而成，保温层又要紧分为泡沫和玻璃棉两大类。山东通风管道多见的风管板为铝箔复合酚醛泡沫板、铝箔复合聚氨酯泡沫板、铝箔复合挤塑聚苯乙烯泡沫板、保温玻璃棉风管板等。这类风管在运用性能上相对抱负，导热系数小、轻质、易施工、洁净等，当前曾经运用在许多大众民用设备中，包含高层设备内

The ventilation pipe of Ji'nan is made of double layer compound protective layer of insulation layer, and the insulation layer is divided into two categories: foam and glass wool. The duct panels commonly seen in Shandong ventilation ducts are aluminum foil composite phenolic foam board, aluminum foil composite polyurethane foam board, aluminum foil composite extruded polystyrene foam board, thermal insulation glass cotton air duct plate, etc. This kind of duct is relatively ideal in application performance, with small thermal conductivity, light weight, easy construction, clean and so on. At present, it has been used in many public and civil equipment, including high-rise equipment