1）风管水平安装，水平度的允许偏差每m不应大于3mm，总偏差不应大于20mm;风管垂直安装，垂直度的允许偏差每m不应大于2mm，总偏差不应大于20mm。
1) For horizontal installation of air duct, the allowable deviation per m of horizontal degree should not be greater than 3 m m, and the total deviation should not be greater than 20 m m; for vertical installation of air duct, the allowable deviation per m of vertical degree should not be greater than 2 m m, and the total deviation should not be greater than 20 m M.
2）管道吊架距法兰距离不小于20mm。柔性短管长度为150~300mm.金属软管及非金属软管长度不得大于2m,并不用有死弯或塌凹。
2) the distance between the pipe hanger and the flange is not less than 20mm. The length of flexible short pipe is 150-300 mm. The length of metal hose and non-metal hose should not be more than 2 m. There is no need for dead bending or collapse.
3）主风管吊架距支管之间的距离应不小于200mm。
3) the distance between the main duct hanger and the branch pipe should not be less than 200mm.
4 )  法兰螺栓孔距低压送风不大于200mm，中压送风距离不大于100mm。5 )  风管弯头处、三通处、阀门处、必须加吊架、管道长度超过15m,防晃支架不得少于一个。
4) flange bolt hole from low pressure air supply is not greater than 200mm, medium pressure air supply distance is not greater than 100mm. 5) Air duct elbows, tees, valves, hangers must be added, pipe length more than 15 m, no less than one anti-sloshing bracket.
6） 通风管道吊架距不保温风管边缘为30mm，距保温风管保温层边缘距离为30mm。
6) The distance between the hanger of the ventilation duct and the edge of the non-thermal air duct is 30 mm, and the distance from the edge of the insulation layer of the thermal air duct is 30 mm.
7） 风管保温应平整，法兰处必须单独保温，法兰保温材料应与管道一致。风管水平度为3‰，垂直度2‰，总体偏差均不大于20mm。
7) the insulation of the air duct should be smooth, and the flange must be kept separately. The flange insulation material should be consistent with the pipeline. The horizontal deviation of the air duct is 3 per thousand and the perpendicularity is 2 per thousand, and the overall deviation is no more than 20mm.
8） 风管与法兰压边宽度应为6~9mm，接触严密并顺直。
8) the width of the flange of the duct and flange should be 6~9mm, and the contact must be tight and straight.
9）玻璃钢风管法兰连接，法兰螺栓间距不大于120mm,法兰间距均匀，法兰平整，法兰垫片厚度为3~5mm。
9) FRP air duct flange connection, flange bolt spacing is not more than 120 mm, flange spacing uniform, flange flat, flange gasket thickness of 3-5 mm.
10）玻璃钢风管长度超过20m时，应加固定支架不得少于一个，玻璃钢风管长度超过20m时应按设计要求加伸缩节。
10) When the length of the FRP air duct exceeds 20 m, no less than one support shall be fixed, and when the length of the FRP air duct exceeds 20 m, the expansion joint shall be added according to the design requirements.
11）风管穿伸缩缝处应采用软连接，软管长度为伸缩缝宽度加100mm。风管保温材料为岩棉时保温应采用铁角包装带，打包带间距为0.6~0.7m。通风管道规格在400mm以下的支吊架间距不大于4m,规格在400mm以上的风管支吊架间距不大于3m.
11) a flexible connection should be adopted at the expansion joint of the wind pipe, and the length of the hose is 100mm of the expansion joint width. When the duct insulation material is rock wool, the iron angle packing strap should be used for the insulation, and the spacing between the packing belts is 0.6~0.7m. The distance between the support and hanger of the ventilation duct specifications below 400 mm is not more than 4 m, and the distance between the support and hanger of the ventilation duct specifications above 400 mm is not more than 3 m.
13 )  风管垂直安装，支架间距不大于4m,玻璃钢管不大于3m。
13) the vertical installation of the air duct, the spacing between supports is not more than 4m, and the FRP pipe is not more than 3m.
14） 排风管道与屋面风机连接应垫6mm的橡胶垫，镀锌螺栓应加平光垫和弹簧垫圈。
14) The exhaust duct should be connected with the roof fan with a 6 mm rubber pad, and the galvanized bolt should be flattened with a matte and a spring washer.
15）室外铁皮风管保温应平整、光滑、咬口不小于20~25mm 。
15) the insulation of outdoor iron pipes should be smooth and smooth, and the bite should not be less than 20~25mm.