The undercut and four corners of the ventilation pipe need to be sealed with sealant. In addition, the sealing surface of the vent pipe joint should be set on the positive pressure side of the vent pipe wall.

在风管加工过程中，通风管道不能设置加强框架或加强筋，因为这会对通风管道的质量产生一定的影响。

In the process of air duct processing, the ventilation duct can not be set with reinforcing frame or rib, because it will have a certain impact on the quality of the ventilation duct.

风管加工不能采用“S”形切割和“C”形直角切割的连接方式。此外，一些特殊的通风管道不能堵塞。

S-shaped cutting and C-shaped right angle cutting can't be used in air duct processing. In addition, some special ventilation ducts should not be blocked.

济南通风管道

Jinan ventilation pipe

1、风管的制造和安装应按照设计图纸、合同和相关技术标准进行。任何变更一定要附有设计或合同变更通知或技术批准签证。

1. The manufacture and installation of air duct shall be in accordance with the design drawings, contract and relevant technical standards. Any change must be accompanied by design or contract change notice or technical approval visa.

2、风管系统施工前，施工单位应与建设单位、监理单位、总承包商和设计单位进行协调。检查风管及其他管道的位置和方向，检查预留孔的安装。施工应与土建工程和其他工种相协调。

2. Before the construction of air duct system, the construction unit shall coordinate with the construction unit, supervision unit, general contractor and design unit. Check the position and direction of air duct and other pipes, and check the installation of reserved holes. Construction shall be coordinated with civil engineering and other types of work.

3、风管生产安装中使用的板材、型材等主要成品应符合设计及相关产品国家现行标准，济南通风管道并有出厂检验证书。材料进场应按现行国家相关标准进行验收。

3. The main finished products such as plates and profiles used in the production and installation of air duct shall meet the current national standards for design and related products, and Jinan ventilation duct shall have factory inspection certificate. Materials entering the site shall be accepted according to the current national standards.

4、当风管与风机连接时，应在进出风口处加软接头，其软接头的断面尺寸应与风机进出风口一致。软管接头一般可采用帆布、人造革等材料，软管长度不宜小于200，松紧度应适宜，柔性软管可缓冲风机的振动。

4. When the air duct is connected with the fan, a soft joint shall be added at the air inlet and outlet, and the section size of the soft joint shall be consistent with the air inlet and outlet of the fan. Generally, the hose joint can be made of canvas, artificial leather and other materials, the length of the hose should not be less than 200, the tightness should be appropriate, and the flexible hose can buffer the vibration of the fan.