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　　安裝風管時，需要考慮它的尺寸及面積，那風管面積計算如下：

　　When installing air ducts, it is necessary to consider their size and area. The calculation of duct area is as follows:

　　1、風管的面積計算公式：圓管F=π×D×L，公式中F-圓形風管展開面積(以m2為單位);D-圓形風管直徑;L-管道中心線長度。矩形風管周長乘以管道中心線長度計算。通風管道彎頭的表面積計算規則是管道延伸至相交的中心線計算。

　　1. The formula for calculating the area of a duct is: circular duct F=π× D × L, where F - the unfolded area of the circular duct (in m2); D-diameter of circular air duct; L - Length of the centerline of the pipeline. Calculate by multiplying the circumference of a rectangular duct by the length of the centerline of the duct. The calculation rule for the surface area of ventilation duct elbows is to extend the duct to the intersecting centerline.

　　2、三通：風管長度以中心線長度為準(主管與支管以其中心線交點劃分)，包括彎頭、三通、變徑管、天圓地方等管件的長度，但不得包括部件所占長度。直徑和周長按圖示尺寸為準展開，咬口重疊部分已包括在定額內，不得另行增加。

　　2. Three way: The length of the air duct is based on the centerline length (the main and branch pipes are divided by the intersection of their centerlines), including the length of elbows, tees, reducers, and other fittings, but not including the length occupied by the components. The diameter and circumference shall be unfolded according to the dimensions shown in the diagram, and the overlapping part of the bite is already included in the quota and cannot be increased separately.

　　通風管道安裝注意事項

　　Precautions for installation of ventilation ducts

　　1、風管和風機連接時，先要在進出風口加上一個軟接頭，而且它的斷面尺寸要跟風機進出風口一樣的，軟管接頭可以用帆布材料，而且它的長度為200以上，松緊度也是要合適才行。

　　1. When connecting the air duct and fan, a flexible joint should be added at the inlet and outlet, and its cross-sectional size should be the same as that of the fan inlet and outlet. The hose joint can be made of canvas material, and its length should be over 200 with appropriate tightness.

　　2、風道和除塵的設備在連接前，也是要等這個設備安裝好后，實際上會對圖紙預制及安裝。

　　2. Before connecting the air duct and dust removal equipment, it is also necessary to wait for the equipment to be installed, and in fact, the drawings will be prefabricated and installed.

　　3、在安裝風道進和出風口時，要在風道預制時對它開出洞，在將它裝完后的風道定要連接緊密。

　　3. When installing the air inlet and outlet of the air duct, holes should be drilled during the prefabrication of the air duct, and the air duct after installation must be tightly connected.

　　4、輸送含濕量比較大時，管道也是需要設坡度，低點處要根據排水管進行連接，注意安裝中，風道底部不能出現一個縱向接縫，如果是接縫處一定要密封處理。

　　4. When conveying high moisture content, the pipeline also needs to have a slope, and the low point should be connected according to the drainage pipe. During installation, it is important not to have a longitudinal joint at the bottom of the air duct. If it is a joint, it must be sealed.

　　5、輸送易燃的鋼板風道，在連接處也是要安裝上跨接線，并且還要連接靜電接地網。

　　5. When transporting flammable steel plate air ducts, jumper wires should also be installed at the connection points, and static grounding grids should be connected.

　　6、當水平風道達到了4m以上時，那么安裝人員就要提前到安全帶綁上，腳手架也是在把它跳板固定好，寬度一定要符合安全規范才行，防止工具等物掉落砸傷人。

　　6. When the horizontal air duct reaches more than 4m, the installation personnel should tie up the safety belt in advance, and the scaffold should also fix its springboard. The width must comply with safety regulations to prevent tools and other objects from falling and injuring people.

　　本文由  濟南通風管道 友情奉獻.更多有關的知識請點擊  http://www.jnhxtcg.com/   真誠的態度.為您提供為全面的服務.更多有關的知識我們將會陸續向大家奉獻.敬請期待.

　　This article is a friendly contribution from Jinan ventilation ducts For more related knowledge, please click http://www.jnhxtcg.com/ Sincere attitude To provide you with comprehensive services We will gradually contribute more relevant knowledge to everyone Coming soon.