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Everyone knows that the ventilation pipe is a necessity, but do you really install the ventilation pipe? Is that right? Let's follow the small series to understand the professional installation of ventilation ducts:

1）風管水平安裝，水平度的允許偏差每m不應大于3mm，總偏差不應大于20mm;風管垂直安裝，垂直度的允許偏差每m不應大于2mm，總偏差不應大于20mm。

1) For horizontal installation of air duct, the allowable deviation of levelness shall not be greater than 3 mm per M and the total deviation shall not be greater than 20 mm; for vertical installation of air duct, the allowable deviation of perpendicularity shall not be greater than 2 mm per m, and the total deviation shall not be greater than 20 mm.

2）管道吊架距法蘭距離不小于20mm。柔性短管長度為150~300mm.金屬軟管及非金屬軟管長度不得大于2m,并不用有死彎或塌凹。

2) The distance between pipe hanger and flange shall not be less than 20 mm. The length of flexible short pipe is 150 ~ 300 mm. The length of metal hose and non-metallic hose shall not be more than 2 m, and there is no dead bend or collapse.

3）主風管吊架距支管之間的距離應不小于200mm。

3) The distance between the main air duct hanger and the branch pipe shall not be less than 200 mm.

4 )  法蘭螺栓孔距低壓送風不大于200mm，中壓送風距離不大于100mm。5 )  風管彎頭處、三通處、閥門處、建議加吊架、管道長度超過15m,防晃支架不得少于一個。

4) the distance between flange bolt hole and low pressure air supply is not more than 200 mm, and that of medium pressure air supply is not more than 100 mm. 5) hangers must be added at the elbow, tee joint and valve of air duct. The length of the pipe is more than 15m, and there shall be no less than one anti sway support.

6） 通風管道吊架距不保溫風管邊緣為30mm，距保溫風管保溫層邊緣距離為30mm。

6) The distance between the hanger of ventilation duct and the edge of uninsulated air duct is 30mm, and the distance from the edge of thermal insulation layer of insulated air duct is 30mm.

7） 風管保溫應平整，法蘭處建議單獨保溫，法蘭保溫材料應與管道一致。風管水平度為3‰，垂直度2‰，總體偏差均不大于20mm。

7) The insulation of air duct should be flat, the flange must be separately insulated, and the insulation material of flange should be consistent with the pipe. The levelness of air duct is 3 ‰ and perpendicularity is 2 ‰, and the overall deviation is not more than 20 mm.

8） 風管與法蘭壓邊寬度應為6~9mm，接觸嚴密并順直。

8) The blank holder width of air duct and flange shall be 6 ~ 9mm, and the contact shall be tight and straight.

9）玻璃鋼風管法蘭連接，法蘭螺栓間距不大于120mm,法蘭間距均勻，法蘭平整，法蘭墊片厚度為3~5mm。

9) For the flange connection of FRP air duct, the distance between flange bolts shall not be greater than 120mm, the flange spacing shall be uniform, the flange shall be flat, and the thickness of flange gasket shall be 3 ~ 5mm.

10）玻璃鋼風管長度超過20m時，應加固定支架不得少于一個，玻璃鋼風管長度超過20m時應按設計要求加伸縮節。

10) When the length of glass fiber reinforced plastic air duct is more than 20 meters, at least one fixed support shall be added. When the length of glass fiber reinforced plastic air duct exceeds 20 meters, expansion joint shall be added according to the design requirements.

11）風管穿伸縮縫處應采用軟連接，軟管長度為伸縮縫寬度加100mm。風管保溫材料為巖棉時保溫應采用鐵角包裝帶，打包帶間距為0.6~0.7m。通風管道規格在400mm以下的支吊架間距不大于4m,規格在400mm以上的風管支吊架間距不大于3m.

11) The flexible connection shall be adopted at the place where the air duct passes through the expansion joint, and the length of the hose is the width of the expansion joint plus 100 mm. When the air duct insulation material is rock wool, the iron angle packing tape should be used, and the packing belt spacing should be 0.6 ~ 0.7m. The distance between supports and hangers of ventilation pipe with specification less than 400mm shall not be greater than 4m, and that of air duct with specification above 400mm shall not be greater than 3m

13 )  風管垂直安裝，支架間距不大于4m,玻璃鋼管不大于3m。

13) the air duct shall be installed vertically, and the support spacing shall not be greater than 4m, and the glass fiber reinforced plastic pipe shall not be greater than 3m.

14） 排風管道與屋面風機連接應墊6mm的橡膠墊，鍍鋅螺栓應加平光墊和彈簧墊圈。

14) 6 mm rubber pad shall be padded for the connection between exhaust pipe and roof fan, and flat smooth pad and spring washer shall be added for galvanized bolt.

15）室外鐵皮風管保溫應平整、光滑、咬口不小于20~25mm 。

15) The insulation of outdoor iron sheet air duct should be flat and smooth, and the bite size should not be less than 20 ~ 25mm.