风管及管道部件设计过程中常用的计算方法

发布人：http://www.sftfgd.com   发布时间：2024-01-16 11:27:39

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。计算风管长度时，一律以施工图示中心线长度为准（主管与支管以其中心线交点划分），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。报价时定额已含损耗，计算结果不需要乘损耗系数。

The installation of air ducts shall be calculated based on different specifications as shown in the construction drawings, without deducting the area occupied by inspection holes, measuring holes, air supply outlets, suction outlets, etc. When calculating the length of the air duct, the length of the centerline on the construction drawing shall be used as the standard (the main pipe and branch pipe shall be divided by the intersection point of the centerline), including the length of fittings such as elbows, tees, variable diameter pipes, and skylines, but shall not include the length occupied by canvas, air valves, silencers, and equipment. The diameter and circumference shall be unfolded according to the dimensions shown in the diagram. When quoting, the quota already includes losses, and the calculation results do not need to be multiplied by the loss coefficient.

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 ducts, purification ventilation ducts, composite air ducts (fiberglass board, non combustible inorganic composite air ducts), the quotation quota already includes flanges, reinforcement frames, and suspension brackets, and will not be calculated separately. However, it does not include the ground support for cross span air ducts, so the weight of the ground support for cross span air ducts needs to be calculated according to the drawings and specifications.

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。

The quotation quota for stainless steel ventilation ducts, aluminum plate ventilation ducts, and air duct bite connections includes fittings and flanges, but does not include suspension brackets. The quotation quota for welded connections only includes fittings, but does not include flanges and suspension brackets. The quantity of work is measured in kilograms. Therefore, the weight of flanges and suspension brackets is calculated according to the design instructions or specifications based on the air duct connection method.

（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。）

(Referring to the settlement data of the constructed project: the content of flange (stainless steel angle iron 3 #) is calculated to be 0.9kg/m2; The content of the suspension bracket (stainless steel angle iron 4 #, stainless steel channel steel 6 #) is calculated to be 1.5kg/m2; If other projects have similar projects, please provide data in a timely manner for timely correction

风管软接：

Flexible connection of air ducts:

（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) Canvas interface, calculated in square meters according to the dimensions shown in the diagram, with a general width of 250mm, specific considerations based on on-site production experience;

（2）软管风管，按图纸尺寸以“米”计算。

(2) Flexible hose duct, calculated in meters according to the dimensions on the drawing.

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”。

Calculate the number of bends according to the specifications of the air duct, and calculate the "area" of the guide vanes according to the table below.

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 air vent valve is measured in units of "pieces" according to different types (fire dampers, butterfly valves, split multi leaf valves, diffusers, louvers, etc.) and specifications (calculated as finished products).

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。

Silencers, silencing static pressure boxes, and static pressure boxes shall be measured in units of "units" according to different specifications (calculated as finished products), and shall be calculated in "square meters" (expanding the six surface areas) unless required by the design for on-site production.

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。

Insect proof nets are calculated in units or square meters, and pricing personnel can convert them according to their needs.

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 there is a need for air duct inspection holes and air duct measurement holes in the design specifications, the inspection holes shall be converted according to the table below, calculated by weight, and the measurement holes shall be measured in "pieces" according to their model.

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 sleeve is made of 2mm thick steel plate or other thicknesses (according to the design drawings), it is calculated as "area".

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