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In the ventilation duct, in addition to the air duct, there are some supports and hangers and other accessories. Therefore, its devices are divided into two parts: one is air duct, including spiral air duct and rectangular air duct, and the other is support and hanger. The following will introduce these two parts in detail.

1.風管

1. Air duct

(1)應在建筑物圍護結構施工完結，以及場合整理完結后進行風管的裝置。

(1) The installation of air duct should be carried out after the completion of building envelope construction and finishing of occasions.

(2)裝置風管前，應對風管的方位，標高以及走向等進行復核，要契合規劃請求，預留孔的方位應準確，孔洞的巨細應大于風管外邊尺度的100mm及以上。

(2) Before installing the air duct, the orientation, elevation and direction of the air duct should be rechecked to meet the planning requirements. The orientation of the reserved hole should be accurate, and the size of the hole should be greater than 100 mm or more of the outer dimension of the air duct.

(3)風管轉移時應避免發作碰撞或摔打，避免損害風管。裝置前應整理掉粉塵以及雜物，裝置過程中如有中止，應關閉風管口，以防有灰塵及異物進入風管。

(3) When the air duct is transferred, the collision or falling should be avoided to avoid damaging the air duct. Before installation, dust and sundries should be cleaned up. If there is a stop in the process of installation, the air duct orifice should be closed to prevent dust and foreign matters from entering the air duct.

(4)風管的接口不能裝置在墻內或樓板內，風管內不能敷設管道、電線以及電纜。

(4) The interface of the air duct shall not be installed in the wall or floor, and pipes, wires and cables shall not be laid in the air duct.

(5)風管如果是運送易燃易爆的氣體，或者是處于這種環境中，那么應有必要的接地辦法進行防護;如果是運送溫度高于80℃的空氣，則應采納必要的防護辦法。

(5) If the air duct is transporting inflammable and explosive gas or is in such environment, necessary grounding method shall be adopted for protection; if it is to transport air with temperature higher than 80 ℃, necessary protection measures shall be adopted.

(6)風管的底部不宜有拼接縫，如有應做好密封處理。

(6) The bottom of the air duct should not have joint, if any, it should be sealed.

(7)風管如要穿過樓板或墻體，則應運用預埋管或防護套管，它們之間還要有柔性資料進行封堵。

(7) If the air duct is to pass through the floor or wall, the embedded pipe or protective sleeve should be used, and flexible data should be used for plugging between them.

(8)風管與設備相連接時，其連接處應有柔性短管，長度為150—300mm，或者是規則的長度請求。

(8) When the air duct is connected with the equipment, there should be a flexible short pipe with a length of 150-300 mm, or a regular length request.

(9)風管測定孔的方位應選在不發生渦流的區域，且要便于丈量和調查。

(9) The orientation of air duct measuring hole should be selected in the area without eddy current, and it should be convenient for measurement and investigation.

2.支吊架

2. Supports and hangers

(1)支吊架的一切配件，其所用資料的運用，應契合規劃請求以及參數請求。

(1) All accessories of supports and hangers shall be used in accordance with planning requirements and parameter requirements.

(2)在風管的答應裝置間隔下，吊架的更小標準應契合規則。

(2) Under the maximum allowable installation interval of air duct, the minimum standard of hanger shall conform to the rules.

(3)支吊架預埋件應裝置準確，且要結實牢靠，其埋入有些應進行整理，而顯露有些應進行防腐處理。

(3) The embedded parts of supports and hangers shall be installed accurately and firmly. Some embedded parts shall be arranged, while others exposed shall be treated with anti-corrosion.

(4)支吊架不宜設在設備的操作部位，對支吊架進行固定時，應運用脹錨螺栓進行固定，脹錨螺栓的運用應契合規則請求。

(4) The support and hanger should not be set in the operation part of the equipment. When fixing the support and hanger, the expansion anchor bolt should be used for fixation, and the application of the expansion anchor bolt should meet the requirements of the rules.

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