一、引言 传统的计算管道管径的方法已延用几十年之久。主要是按手册上所规定的流速范围,阻力降来确定。然而,对于长距离的煤气管道管径的选择,还应从能源利用、经济效益方面加以综合考虑。尤其是长距离的铸铁煤气管,因其使用寿命长,所以,如管径选择得当,则在节约能源,经济效益上都会获得一定的效果。 I. INTRODUCTION The traditional method of calculating pipe diameter has been used for several decades. Mainly in accordance with the flow rate range specified in the manual, resistance drop to determine. However, the selection of long-distance gas pipeline diameters should also be considered comprehensively in terms of energy use and economic benefits. In particular, long-distance cast iron gas pipes have a long service life. Therefore, if the pipe diameters are properly selected, they will achieve certain effects in energy conservation and economic benefits.