Shenyang ventilation pipeline Specification for installation and fabrication

Shenyang Ventilation duct Fabrication method, requirements and specifications for installation of ventilation ducts

1. The main materials, equipment, finished products and semi-finished products used in ventilation and air conditioning works shall be provided with factory certificates or quality appraisal documents.

2. The tee of circular air duct has an included angle of 90 º.

3. Ventilation workers shall construct according to the approved design drawings.

4. The size of the ventilation pipe shall be constructed according to the drawing, and the inner diameter shall prevail. The connecting pipe shall be consistent with the valve body.

5. The connection of each section of air duct shall be detachable.

6. The bending radius and the number of small sections of circular bends and the bending radius of rectangular bends shall be in accordance with the relevant provisions of the Technical Operation Specification for Construction of Building and Installation Engineering.

7. The thickness of air duct shall comply with the standard. Installation of ventilation duct

The following inspections shall be carried out before the installation of components, and the installation can only be carried out after passing the inspection and filling in relevant acceptance data:

1) All kinds of valves shall be made firmly, and the regulating brake device shall be accurate, flexible and reliable, and the valve opening and closing direction shall be marked, Fire damper The shell thickness shall be no less than 2mm, and the material selection shall meet the requirements of GB50243-97.

2) The tuyere surface shall be flat with deviation<=2mm, the diagonal difference of rectangular tuyere<=3mm, and the allowable deviation of any two orthogonal diameters of circular tuyere<=2mm.

3) The rotating parts of the tuyere shall be flexible, the blade or insert plate shall be straight, the blade spacing shall be uniform, the diffuser and the adjustment shall be coaxial, the axial spacing shall be evenly distributed, the opening and closing of the blade shall be complete, the direction of the air defense closed valve shall be accurate with the shock wave, and it shall not be reversed. The blade shall be fully opened or closed, and it shall not be used for air volume adjustment.

4) The flexible short pipe civil air defense and poison filtering system shall be rubber type, and the others shall be three proof fireproof canvas. All hangers, supports and brackets shall be flat and firm, with full welds and even arc of hoop.

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