通风管道材料及尺寸的基本要求！

一、通风管道的材料

1、 of duct

1 金属薄板：

1 sheet metal:

普通薄钢板：有良好的加工性能和结构强度，但易于生锈；

thin steel plate: good and , but easy to rust;

镀锌薄钢板：表面镀锌，有防锈作用，一般用来制作无酸雾作用的潮湿环境中；

steel sheet: the of steel sheet is and has the of rust . It is used to make wet acid mist ;

铝及铝合金板：加工性能好，耐腐蚀，摩擦时不易产生火花，常用于有防爆要求的通风系统中；

and alloy plate: good , , not easy to , used in with -proof ;

不锈钢板：具有耐锈耐酸能力，常用于制作寒湿、寒酸的排风管道及化工环境中需耐腐蚀的通风系统；

steel plate: it has the of and acid . It is often used to make cold, wet and sour pipes and the that needs in ;

塑料复合钢板：在普通薄钢板表面上喷上一层0.2-0.4mm厚的塑料层，常用于防尘要求较高的空调系统和-10度—70度温度下耐腐蚀系统的风管；

steel plate: spray a layer of 0.2-0.4mm thick layer on the of thin steel plate, which is used in air with high dust-proof and air duct of - at - 10-70 ℃;

2 非金属材料：

2. Non :

硬聚氯乙烯塑料板：适用于有酸性腐蚀作用的通风系统，具有表面光滑、制作方便等优点，但不耐高温、不耐寒，只适用于0—60摄氏度的空气环境，在太阳辐射作用下易脆裂；

Rigid plate: it is for with acid , with and , but it is not to high and cold. It is only for 0-60 ℃ air and easy to crack under the of solar ;

玻璃钢：具有轻质、高强、不燃、耐腐蚀、耐高温、抗冷融等特性。

FRP: with light, high , non , , high , cold melt and other .

二、通风管道尺寸的基本要求

2、 Basic of duct size

通风、空气调节系统的风管，宜采用圆形或长、短边之比不大于4的矩形截面，其长、短边之比不应超过10。风管的截面尺寸，宜按现行标准《通风与空气调节工程施工质量验收规范》(GB 50243)中的规定执行，金属风管管径应为外径或外边长；非金属风管管径应为内径或内边长。

The air duct of and air be or with the ratio of long and short sides no more than 4, and the ratio of long and short sides not 10. The size of air duct be in with the "code for of of and air " (GB 50243). The of metal air duct be the outer or outer ; the of non- duct be the inner or inner side .