专注通风管道加工·排烟罩

1. Jinan air duct processing quantity calculation, regardless of material, is based on the length of the air duct center line in the construction drawing, and is calculated according to the unfolded area of different cross-section shapes (circle, square and moment), measured in square meters.

①、圆形风管展开面积，不扣除检查孔、测定孔、送风口、吸风口等所占面积，咬口重叠所占面积，咬口重叠部分也不增加。

① The developed area of circular air duct does not deduct the area occupied by inspection hole, measuring hole, air supply outlet and air suction outlet, and the overlapping area of biting does not increase.

②风管加工长度计算，一律以施工图所示线长度为准，包括弯头、三通、变径管、天圆地方管件长度。支管长度以支管线与主管线交接点为分界点。风管长度不包括部件所占长度，其部件长度值见下表：序号 部件名称 部件长度 序号 部件名称 部件长度 1 蝶阀 150 4 圆形风管防火阀 D+240 2 止回阀 300 5 矩形风管防火阀 B+240 3 密闭式对开多页调节 阀 210 注：D为风管外径，B为方风管外边高。

② The processing length of air duct shall be calculated according to the center line length shown in the construction drawing, including the length of elbow, tee, reducing pipe and pipe fitting at Tianyuan place. The length of branch pipe is divided by the junction point between the center line of branch pipe and the center line of main pipe. The length of the air duct does not include the length of the components. The length values of the parts are shown in the following table: serial number component name part length serial number part length 1 butterfly valve 150 4 circular air duct fire damper D + 240 2 check valve 300 5 rectangular air duct fire damper B + 240 3 closed type split multi leaf regulating valve 210 note: D is the outer diameter of the air duct, B is the outer edge height of the square air duct.

③、风管加工与安装定额包括：弯头、三通、变径管、天圆地方等管件及发兰、加固框和吊架、托架、支架的制作与安装。未计价材料计算了钣材料，而发兰和支架、吊架、托架按定额规定计算其价值后，还要计算其材料数量，并按规格、品种列入材料汇总表中。风管制作与安装定额不包括：过跨风管的落地支架制作安装。落地支架以“千克”计量,使用第九篇《通风空调工程》定额第七章设备支架子目。

③ Air duct processing and installation norms include: elbow, tee, reducing pipe, Tianyuan place and other pipe fittings and flange, reinforcement frame and hanger, bracket, bracket and installation. The sheet material is calculated for the unpriced materials, and after the value of the flange, bracket, hanger and bracket is calculated according to the quota, the material quantity shall be calculated and listed in the material summary table according to the specifications and varieties. The production and installation quota of air duct does not include: the manufacture and installation of floor support for crossing air duct. The floor support is measured in kilogram, and the equipment support subitem in Chapter 7 of the quota of Chapter IX ventilation and air conditioning engineering is used.

④、净化通风管道及部件制作与安装，工程量计算方法与一般通风管道相同，用相应定额。但是零部件安装要计算净化费，按相应部件子目安装基价的35%作为净化费，其中人工费占40%。对净化管道与建筑物缝隙之间所作的精华密封处理，按实计算费用。

④ For the fabrication and installation of purification ventilation pipeline and components, the calculation method of engineering quantity is the same as that of general ventilation pipeline, and the corresponding quota is used. However, the purification cost should be calculated for the installation of parts, and 35% of the basic installation price of the corresponding component subitems is taken as the purification cost, of which the labor cost accounts for 40%. The essence seal treatment between the purge pipe and the building gap is processed according to the actual cost.