1, the longitudinal joints should be avoided as far as possible during the processing of ventilation pipes, but there must be no transverse joints. Moreover, the seam of the ventilation pipe and the gap between the four corners should be designed according to the requirement of cleanliness level, and then sealant should be used. In addition, the sealing surface of the connection seam of the ventilation pipe plate should be located on the positive pressure side of the ventilation pipe wall.

2、加工的时候，不能在通风管道内部设置加固框或者加固筋，因为这样对于通风管道的质量会造成一定的影响。

2, when processing, can not be installed inside the ventilation pipe reinforcement box or reinforcement, because this will have a certain impact on the quality of the ventilation pipe.

3、通风管道加工不能采用S型插条和C型直角插条的连接方式，另外对于一些特殊的通风管道来说，还不能采用按扣式的咬口。

3. The connection mode of the S bar and C right angle bar can not be used in the ventilation pipe processing. In addition, for some special ventilation pipes, the button type bite can not be used.

4、通风管道制作完毕之后，还要用清洗液进行清洗，只有达到清洗标准之后，才可以及时封口。

4, after the ventilation pipe is finished, it is also necessary to use the cleaning fluid to clean. Only when the cleaning standard is achieved can it seal in time.

5、如果是彩色涂层钢板通风管道的话，应该保持内壁是光滑的，而且通风管道加工的过程中，还不能将涂层损坏，若是出现损坏的部位，需要用环氧树脂涂刷在表面即可。另外通风管道加工的过程中，还要做好防腐蚀措施，不能使用抽芯铆钉，而且在通风管道零件装配的时候，这些零件都要经过镀锌处理才行。

5. If a color coated steel plate is ventilated, the inner wall should be kept smooth, and the coating can not be damaged during the processing of the ventilation pipe. If the damaged parts appear, the epoxy resin should be painted on the surface. In addition, in the process of the ventilation pipe processing, the corrosion prevention measures must be done, and the core rivet can not be used, and when the parts of the ventilation pipe are assembled, these parts should be galvanized.