There are many materials to choose in the processing of Jinan ventilation pipeline, but there are still several kinds of materials commonly used. Today, I will introduce the materials of ventilation pipeline: steel, plywood, fiberboard, brick and concrete. Thin steel sheet is the most commonly used material. It is divided into two kinds: common steel sheet and galvanized steel sheet. The thickness of general ventilation and air conditioning system is 0. 5 - 1. 5 mm steel plate. PVC board can also be used as air duct material. It is clean, dust-free and corrosion-resistant. It is sometimes used in air-conditioning projects. But its cost and installation cost are very high. In recent years, after surface treatment, fiberglass board pipes have both sound insulation and heat preservation effects.

　　1. 薄鋼風管。采用低碳鋼制造薄鋼板通風管道效果較好，冷軋鋼板適合通風空調工程。

　　1. Thin steel air duct. It is better to use low carbon steel to make ventilation pipe of thin steel plate, and cold rolled steel plate is the most suitable for ventilation and air conditioning engineering.

　　厚度是1。厚度小于2mm的薄鋼管應采用咬口連接，厚度小于2mm的薄鋼管應采用焊接連接。根據有關規定，當矩形風管邊長≥630mm，保溫風管邊長≥800mm時，管段長度為1。以上2mm均應采取加固措施。風管一般采用角鋼加固，邊沿采用高接頭(垂直咬口)或風管壁上滾溝加固。風管與風管的連接通常采用角鋼或扁鋼法蘭。

　　The thickness is 1. Thin steel pipes with thickness less than 2 mm should be joined by bite, and thin steel pipes with thickness less than 2 mm should be joined by welding. According to the relevant regulations, when the length of rectangular duct side is more than 630 mm and the length of insulation duct side is more than 800 mm, the length of duct section is 1. Reinforcement measures should be taken for the above 2mm. Angle steel is generally used to reinforce the air duct, and high joint (vertical bite) or groove on the wall of the air duct is used to reinforce the edge. The connection between air duct and air duct usually adopts angle steel or flat steel flange.

　　鍍鋅鋼管。施工時應注意鍍鋅鋼板，以免鍍鋅層被損壞，應采用咬合和鉚接。

　　Galvanized steel pipe. During construction, attention should be paid to galvanized steel sheets to avoid damage to the galvanized coating, and occlusion and riveting should be adopted.

　　3、不銹鋼板風管。加工過程中，應保護板材表面不受劃傷、劃傷、壓痕等缺陷的影響，不得用錘子敲打，以免損壞合金元素的晶體結構，否則在被錘子敲打的地方會出現腐蝕中心。當管壁厚度大于0時，不銹鋼具有較高的強度和良好的彈性。在8mm時，焊接一般采用厚度為0的焊接。8mm以下采用咬合接頭。不銹鋼風管連接采用法蘭，一般是將不銹鋼板切成條狀，矩形法蘭可根據尺寸焊接，圓形法蘭則采用冷彎法加工。

　　3. Stainless steel plate air duct. In the process of processing, the surface of plate should be protected from scratches, scratches, indentations and other defects, and hammers should not be used to knock, so as to avoid damaging the crystal structure of alloy elements, otherwise corrosion centers will appear where hammers knock. When the wall thickness is greater than 0, stainless steel has high strength and good elasticity. At 8mm, the thickness of welding is usually 0. The occlusal joint is used below 8mm. The stainless steel air pipe connection adopts flange, which generally cuts the stainless steel plate into strips. The rectangular flange can be welded according to its size, while the circular flange is processed by cold bending method.

　　4. 鋁管。摩擦時不產生火花，常用于防爆通風系統中。

　　4. Aluminum tube. Friction does not produce sparks and is often used in explosion-proof ventilation systems.

　　風管咬合成型應盡量采用木錘或木方尺。為避免咬合變形，好采用機械成型。當鋁板厚度大于1時。5mm時可采用氣焊或氮氣電弧焊。

　　Wood hammer or square ruler should be used as far as possible in air duct bite synthesis. In order to avoid occlusal deformation, it is better to adopt mechanical forming. When the thickness of aluminium plate is greater than 1. Gas welding or nitrogen arc welding can be used for 5 mm.

　　鋁及鋁合金與鐵、銅等金屬接觸會產生電化學腐蝕，因此，鋁盤管應盡量采用鋁法蘭;如果使用普通角鋼法蘭，應進行鍍鋅或防腐保溫處理，鉚接應采用鋁鉚釘。

　　Aluminum and aluminium alloy contact with iron, copper and other metals will produce electrochemical corrosion. Therefore, aluminum flange should be used as far as possible for aluminium coil. If common angle steel flange is used, zinc plating or anti-corrosion and heat preservation treatment should be carried out, and aluminum rivet should be used for riveting.

　　5、復合管。常用于對防塵要求較高的空調系統和-10℃-70℃的防腐系統風道。這種風管在加工時注意不要破壞塑料層，其連接方法只能是咬合和鉚接。

　　5. Composite pipe. It is often used in air-conditioning systems with high dust-proof requirements and air ducts of anti-corrosion systems with temperature ranging from - 10 C to 70 C. This kind of air duct should not destroy the plastic layer during processing. The connecting method can only be occlusion and riveting.

　　硬PVC塑料板風管。硬聚氯乙烯塑料具有良好的化學穩定性，對各種酸、堿、鹽穩定，但對強氧化劑和濃硝酸、發煙硫酸、芳香烴和氯化烴不穩定。

　　Hard PVC plastic sheet air duct. Hard polyvinyl chloride plastics have good chemical stability and are stable to various acids, alkalis and salts, but unstable to strong oxidants and concentrated nitric acid, fuming sulfuric acid, aromatic hydrocarbons and chlorinated hydrocarbons.