通風管道的部件設計的計算方式

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1、 風管安裝 按施工圖示不同規(guī)格以展開“面積”計算，不扣除檢查孔、測定孔、送風口、吸風口等所占面積。計算風管長度時，一律以施工圖示線長度為準（主管與支管以其線交點劃分），包括彎頭、三通、變徑管、天圓地方等管件的長度，但不得包括帆布、風閥、消聲器、設備所占長度。直徑和周長按圖示尺寸為準展開。報價時定額已含損耗，計算結果不需要乘損耗系數(shù)。

1. The air duct installation shall be calculated according to the "area" of different specifications in the construction drawing, and the area occupied by inspection hole, measurement hole, air supply outlet, air suction outlet, etc. shall not be deducted. When calculating the length of the air duct, the length of the center line in the construction drawing shall prevail (the main pipe and branch pipe shall be divided by the intersection of the center line), including the length of elbow, tee, reducer, round place and other pipe fittings, but shall not include the length occupied by canvas, air valve, muffler and equipment. The diameter and perimeter shall be expanded according to the dimensions shown in the figure. The quota includes loss when quoting, and the calculation result does not need to be multiplied by loss coefficient.

2、薄鋼板通風管道、 凈化通風管道 ，復合型風管（玻纖板、不燃無機復合風管），報價定額內已包括法蘭、加固框和吊托支架，不另行計算。但不包括過跨風管落地支架，因此過跨風管落地支架需按圖按規(guī)范計算重量。

2. Sheet steel ventilation duct, purification ventilation duct and composite air duct (fiberglass board and incombustible inorganic composite air duct). The quotation quota has included flange, reinforcement frame and lifting support, which will not be calculated separately. However, it does not include the floor support of over span air duct, so the weight of the floor support of over span air duct shall be calculated according to the drawings and specifications.

3、 不銹鋼通風管道 、鋁板通風管道，風管咬口連接中報價定額包括管件、法蘭，但不包括吊托支架，焊接連接中報價定額僅包括管件，不包括法蘭和吊托支架，其工程量以“kg”為計量單位，故根據(jù)風管連接方式按設計說明或規(guī)范計算法蘭和吊托支架重量。

3. The quotation quota of stainless steel ventilation pipe, aluminum plate ventilation pipe and air pipe undercut connection includes pipe fittings and flanges, but does not include lifting bracket. The quotation quota of welding connection only includes pipe fittings, excluding flange and lifting bracket. The quantities are measured in "kg". Therefore, the weight of flange and lifting bracket is calculated according to the design description or specification according to the connection mode of air pipe.

（參考已施工項目結算數(shù)據(jù)：法蘭（不銹鋼角鐵3#）的含量測算0.9kg/m2；吊托支架（不銹鋼角鐵4#、不銹鋼槽鋼6#）含量測算：1.5kg/m2；若其他項目有類似工程請及時提供數(shù)據(jù)及時更正；）

(refer to the settlement data of constructed projects: the content of flange (stainless steel angle iron 3#) is calculated to be 0.9kg/m2; Calculation of the content of lifting bracket (stainless steel angle iron 4#, stainless steel channel steel 6#): 1.5kg/m2; If there are similar projects in other projects, please provide data and correct them in time;)

4、風管軟接，（1）帆布接口，按圖示尺寸以“”計算，一般寬度為250mm，具體以現(xiàn)場制作經(jīng)驗考慮。（2）軟管風管，按圖紙尺寸以“米”計算。

4. Flexible connection of air duct, (1) canvas interface is calculated in "square meter" according to the size shown in the figure, and the general width is 250mm, which is considered based on the on-site manufacturing experience. (2) Hose duct, calculated in "meters" according to the size of the drawing.

5、風管導流葉片，按風管規(guī)格計算彎頭個數(shù)，按下表計算導流葉片“面積”。

5. For the air duct guide vane, the number of elbows shall be calculated according to the air duct specification, and the "area" of the guide vane shall be calculated according to the following table.

6、風口風閥，按不同類型（防火閥、蝶閥、對開多葉閥、散流器、百葉等）不同規(guī)格以“個”為計量單位（按成品計算）。

6. The air valve at the air outlet shall be measured in "pieces" according to different types (fire damper, butterfly valve, split multi leaf valve, diffuser, louver, etc.) (calculated according to finished products).

7、消聲器、消聲靜壓箱、靜壓箱，按不同規(guī)格以“臺”為計量單位（按成品計算），除設計要求現(xiàn)場制作時以“”（展開六個面面積）計算。

7. Silencer, silencing static pressure box and static pressure box shall be measured by "table" according to different specifications (calculated according to finished products). Except for the design requirements, it shall be calculated by "square meter" (expanded area of six surfaces) during on-site production.