In fact, many factories have small workshop areas, but their output is not small. The mechanical area of the workshop accounts for a large proportion of the production area and is densely staffed. It will lead to poor air quality in the workshop, and the adverse environment will affect the production enthusiasm and work efficiency of workers. It is unreasonable for many factories to choose to install ventilation pipes. The use of this device to improve workshop air quality and environmental effects is also evident to all.

根据本工程的特点，场所要宽敞、明亮、干净，地面要平整。生产中需要基本机具设备及电源保护装置齐全。

According to the characteristics of this project, the site should be spacious, bright, clean, and the ground should be flat. Basic machinery, equipment, and power safety protection devices are required to be complete in production.

风管的安装应在障碍物已经，地面无杂物妨碍施工的情况下进行。

The installation of air ducts should be carried out when obstacles have been removed and there are no debris on the ground that hinders construction.

设备是在建筑结构、室内装修及内部隔断、地面铺装等都做好的情况下安装的，这时通风系统的干管也做好了。

The equipment is installed with the building structure, interior decoration, internal partitions, and ground paving in place, and the main pipes of the ventilation system are also in place.

制造方法

manufacturing method 

通风、空气调节工程所用主要材料、设备、成品半成品等应具有出厂合格证或质量鉴定文件。

The main materials, equipment, finished and semi-finished products used in ventilation and air conditioning engineering should have factory certificates or quality appraisal documents.

通风工程必须按照批准的设计图纸进行施工。

Ventilation works must be constructed in accordance with the approved design drawings.

通风管制造的尺寸应按图施工，均以内径为准，连接管应与阀体一致。

The dimensions of the ventilation pipe manufacturing should be constructed according to the drawing, and the inner diameter should be used as the standard. The connecting pipe should be consistent with the valve body.

圆形弯管和矩形弯管的弯曲半径及少节数，按《建筑安装工程施工技术操作规程》中有关规定执行。环形风管的三通，其夹角为90°。

The bending radius and number of missing sections of circular and rectangular bends shall be in accordance with the relevant provisions of the "Technical Operation Regulations for Construction and Installation Engineering". The tee of the circular air duct has an included angle of 90 °.