What should I do if the ventilation pipe fails and the exhaust effect is not good? At this time, it is necessary to reinforce the ventilation pipe. The reinforcement of the ventilation pipe can ensure the stability of the static pressure in the actual application of the ventilation pipe. In the process of strengthening the ventilation pipe, Shandong ventilation pipe processing factory mainly carries out the work from the following 8, and carries out maintenance and reinforcement.

1).風管的加固可采用楞筋、立筋、角鋼(內、外加固)、扁鋼、加固筋和管內支撐等形式。

the reinforcement of air duct can be in the form of corrugated bar, vertical bar, angle steel (internal and external reinforcement), flat steel, reinforcement bar and pipe internal support.

2).圓形風管(不包括螺旋風管)直徑大于等于8mm，且其管段長度大于1250mm或總表面積大于4m2均應采取加固措施。

if the diameter of circular air duct (excluding spiral air duct) is greater than or equal to 8mm, and the length of pipe section is greater than 1250mm or the total surface area is greater than 4m2, reinforcement measures shall be taken.

3).矩形風管邊長大于630mm、保溫風管邊長大于800mm,管段長度大于1250mm或低壓風管單邊面積大于1.2m2、中壓、高壓風管大于1.0㎡，均應采取加固措施。

 if the side length of rectangular air duct is greater than 630mm, the side length of insulation air duct is greater than 800mm, the length of pipe section is greater than 1250mm, or the area of single side of low-pressure air duct is greater than 1.2m2, and the area of medium pressure and high-pressure air duct is greater than 1.0m2, reinforcement measures shall be taken.

4).非規則橢圓風管的加固，應參照矩形風管執行。

the reinforcement of irregular elliptical duct shall refer to rectangular duct.

5).楞筋或楞線的加固，排列應規則，間隔應均勻，板面不應有明顯的變形。

the reinforcement of corrugated bars or lines shall be arranged in a regular way, with even spacing and no obvious deformation on the board surface.

6).角鋼、加固筋的加固，應排列整齊、均勻對稱，其高度應小于或等于風管的法蘭寬度。角鋼、加固筋與風管的鉚接應牢固、間隔要均勻。不應大220mm，相交處應連接為一體。

the reinforcement of angle steel and reinforcing bar shall be arranged orderly, evenly and symmetrically, and its height shall be less than or equal to the flange width of air duct. The riveting of angle steel, reinforcing bar and air duct shall be firm and evenly spaced. It shall not be larger than 220mm, and the intersection shall be connected as a whole.

7).管內支撐與風管的固定應牢固，各支撐點之間或風管的邊沿或法蘭的間距應均勻，不應大于950mm。

 the support in the pipe and the air pipe shall be fixed firmly, and the spacing between each support point or the edge or flange of the air pipe shall be uniform and not more than 950mm.

8).中壓和高壓系統的風管管段，其長度大于1250mm時，還應有加固框進行補強。高壓系統金屬風管的單咬口縫，還應有防止咬口縫脹裂的加固或補強措施。

 when the length of the air duct section of the medium pressure and high pressure system is greater than 1250mm, it shall be reinforced by a reinforcing frame. For the single seam of metal air duct in high pressure system, reinforcement or reinforcement measures shall be taken to prevent the seam from expanding and cracking.

山東通風管道加工維修廠家經過多年的實踐經驗總結出：在實際通風管道加固的過程中，需要根據壓力大小、尺寸大小選擇相應的加固方式，加固方式的選擇，對更終通風管道的使用壽命起到決定性作用。

After many years of practical experience, Shandong ventilation pipe processing and maintenance factory summed up that: in the process of actual ventilation pipe reinforcement, it is necessary to select the corresponding reinforcement method according to the pressure and size, and the selection of reinforcement method, which plays a decisive role in the service life of the final ventilation pipe.