(1) 送风，包括通气，如送鲜风和排气，这个范围很广，如工厂车间，生产 场地空气，由于有害气体产生需要排出室外，又需要把室外空气输送至室内。这 时就要使用流量大而压力小的空气输送管道，螺旋风管就最适用，一般情况下使 用镀锌铁管，有腐蚀性及特别潮湿场所使用不锈钢管。 (2) 送冷风。最常见的是中央空调的管道，这种管道需要加保温材料。螺旋 风管可内贴保温材料，外表看来美观。 (3) 排油烟。饭店、酒楼、宾馆的厨房均有大量油烟产生，需要排出，使用 圆形的风管就是油烟囱。在这里，螺旋风管该叫做油烟管。 (4) 除尘。有些工厂生产车间很多尘埃，需要专门的除尘装置，其中风流量 较大的管道，可使用螺旋风管。 (5) 散装物料输送。

(1) air supply, including ventilation, such as fresh air and exhaust, has a wide scope, such as factory workshop and production site air. Due to harmful gas generation, outdoor air needs to be discharged and indoor air is transported to the indoor area. At this time, we need to use large and low pressure air conveying pipeline. The spiral air duct is most suitable. In general, galvanized iron pipes are used, corrosive stainless steel pipes are used in special damp places. (2) send a cold wind. The most common is the pipe in the central air conditioning, which requires insulation. The spiral wind pipe can be attached to the heat insulation material, and the appearance looks beautiful. (3) exhaust fume. Hotel, restaurant and hotel kitchens have a lot of fume, need to discharge, using circular duct is smoke chimney. Here, the spiral wind pipe should be called the oil smoke tube. (4) dust removal. Some factories produce a lot of dust in the workshop, and special dust removal devices are needed, in which the spiral pipes can be used in the pipes with large air flow. (5) bulk material delivery.