一、蒸汽计量的特点全国广大用户基本上都使用饱和蒸汽。由于饱和蒸汽的使用量大,各家的饱和蒸汽质量又不相同,通常用干度来衡量饱和蒸汽的质量好坏(干度是指饱和蒸汽中的含水量多少)。最好的是干饱和蒸汽,一般称微过热饱和蒸汽,其中含水量可忽略不计。而干度差的称湿饱和蒸汽,含水量最多可达30%,这就存在着 First, the characteristics of steam metering Most users throughout the country are using saturated steam. Due to the large amount of saturated steam used, the quality of saturated steam in each household is not the same. The quality of saturated steam is usually measured by dryness (the dry content is the amount of water in saturated steam). The best is dry saturated steam, generally referred to as superheat saturated steam, of which the water content is negligible. The poor dryness, said saturated steam, water content up to 30%, which exists