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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.

在風管加工過程中，通風管道不能設置加強框架或加強筋，因為這會對通風管道的質量產生一定的影響。

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.

風管加工不能采用“S”形切割和“C”形直角切割的連接方式。此外，一些特殊的通風管道不能堵塞。

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.

濟南通風管道

Jinan ventilation pipe

1、風管的制造和安裝應按照設計圖紙、合同和相關技術標準進行。任何變更一定要附有設計或合同變更通知或技術批準簽證。

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、風管系統施工前，施工單位應與建設單位、監理單位、總承包商和設計單位進行協調。檢查風管及其他管道的位置和方向，檢查預留孔的安裝。施工應與土建工程和其他工種相協調。

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、風管生產安裝中使用的板材、型材等主要成品應符合設計及相關產品國家現行標準，濟南通風管道并有出廠檢驗證書。材料進場應按現行國家相關標準進行驗收。

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、當風管與風機連接時，應在進出風口處加軟接頭，其軟接頭的斷面尺寸應與風機進出風口一致。軟管接頭一般可采用帆布、人造革等材料，軟管長度不宜小于200，松緊度應適宜，柔性軟管可緩沖風機的振動。

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.