风管及管道部件设计过程中常用的计算方法您知道是怎样的吗？实际上对于业余人员来讲，可能不太好理解，但还是建议您在使用之前多来了解，下面
山东通风管道厂家为你解答：
Do you know the common calculation methods used in the design of duct and pipe components? In fact, it may not be easy for amateurs to understand, but it is still recommended that you learn more before use. The following is the answer from Shandong ventilation pipe manufacturer:
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风管安装按施工图示不同规格以展开“面积”计算，不扣除检查孔、测定孔、送风口、吸风口等所占面积。
The air duct installation shall be calculated based on the "area" of different specifications in the construction drawing, excluding the area occupied by inspection holes, measuring holes, air supply outlets, suction outlets, etc.
计算风管长度时，一律以施工图示线长度为准（主管与支管以其线交点划分），包括弯头、三通、变径管、天圆地方等管件的长度，但不得包括帆布、风阀、消声器、设备所占长度。直径和周长按图示尺寸为准展开。
When calculating the length of the air duct, the length of the center line in the construction drawing shall prevail (the main pipe and the branch pipe shall be divided by the intersection of the center line), including the length of the elbow, tee, reducing pipe, the radius of the sky and other pipe fittings, but not including the length of canvas, air valve, muffler, and equipment. The diameter and perimeter shall be expanded according to the dimensions shown in the figure.
报价时定额已含损耗，计算结果不需要乘损耗系数。
The quota includes loss when quoting, and the calculation result does not need to be multiplied by loss factor.
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薄钢板通风管道、净化通风管道，复合型风管（玻纤板、不燃无机复合风管），报价定额内已包括法兰、加固框和吊托支架，不另行计算。但不包括过跨风管落地支架，因此过跨风管落地支架需按图按规范计算重量。
Thin steel plate ventilation duct, purification ventilation duct, composite air duct (fiberglass board, incombustible inorganic composite air duct), flanges, reinforcement frame and lifting bracket have been included in the quotation quota, and are not calculated separately. However, it does not include the over-span air duct floor support, so the weight of the over-span air duct floor support shall be calculated according to the drawing and specifications.
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不锈钢通风管道、铝板通风管道，风管咬口连接中报价定额包括管件、法兰，但不包括吊托支架，焊接连接中报价定额仅包括管件，不包括法兰和吊托支架，其工程量以“kg”为计量单位，故根据风管连接方式按设计说明或规范计算法兰和吊托支架重量。
For stainless steel ventilation pipes and aluminum plate ventilation pipes, the quotation quota in the air duct seaming connection includes pipe fittings and flanges, but does not include lifting brackets. The quotation quota in the welding connection only includes pipe fittings, but does not include flanges and lifting brackets. The work quantity is measured in "kg". Therefore, the weight of flanges and lifting brackets is calculated according to the air duct connection method and the design instructions or specifications.
参考已施工项目结算数据：法兰（不锈钢角铁3#）的含量测算0.9kg/m2；吊托支架（不锈钢角铁4#、不锈钢槽钢6#）含量测算1.5kg/m2；若其他项目有类似工程请及时提供数据及时更正。
Refer to the settlement data of the constructed project: the content of flange (stainless steel angle iron 3 #) is estimated to be 0.9kg/m2; The content of lifting bracket (stainless steel angle iron 4 #, stainless steel channel steel 6 #) is estimated to be 1.5kg/m2; If there are similar projects in other projects, please provide data timely for correction.
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风管软接：
Flexible connection of air duct:
（1）帆布接口，按图示尺寸以“”计算，一般宽度为250mm，具体以现场制作经验考虑；
(1) The canvas interface is calculated in "square meters" according to the size shown in the figure, and the general width is 250mm, which is based on the site production experience;
（2）软管风管，按图纸尺寸以“米”计算。
(2) The hose duct is calculated in "m" according to the drawing size.
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风管导流叶片，按风管规格计算弯头个数，按下表计算导流叶片“面积”。
For the guide vane of air duct, calculate the number of elbows according to the specification of air duct, and calculate the "area" of guide vane according to the following table.
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风口风阀，按不同类型（防火阀、蝶阀、对开多叶阀、散流器、百叶等）不同规格以“个”为计量单位（按成品计算）。
The unit of measurement is "piece" (calculated as finished product) according to different types (fire damper, butterfly valve, split multi-leaf valve, diffuser, louver, etc.) and different specifications.
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消声器、消声静压箱、静压箱，按不同规格以“台”为计量单位（按成品计算），除设计要求现场制作时以“”（展开六个面面积）计算。
Silencer, silencing static pressure box and static pressure box shall be measured by "set" (calculated by finished product) according to different specifications, and shall be calculated by "square meter" (six surface areas) except for the design requirements.
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防虫网以“个”计算或者以“”计算，组价人员可根据需要自行换算。
The insect-proof net is calculated in "pieces" or "square meters", and the pricing personnel can convert it according to their needs.
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设计说明有需要风管检查孔与风管测定孔的，检查孔按下表换算，以重量计算，测定孔按其型号以“个”为计量单位。
If the design specification requires air duct inspection hole and air duct measuring hole, the inspection hole shall be converted according to the following table and calculated by weight, and the measuring hole shall be measured in "piece" according to its model.
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过墙套管采用2mm厚钢板或其他厚度时（按设计图纸）以“面积”计算。
When the wall casing adopts 2mm thick steel plate or other thickness (according to the design drawing), it is calculated by "area".
We have learned about the commonly used calculation methods in the design of air duct and pipe components. We hope that the ten key points can give you some information. For more matters, please come to consult us http://www.jntfgd.com ！
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