输气管末端的工作特点Working characteristics of the end of the gas pipe：（)

A、起点流量变化很小，近似认为不变，终点流量随昼夜用气量的不同变化较大。Q1变化幅度＜q2变化幅度the change of the starting flow is small, and it considered to be invariable approximately. amplitude q1 less than＞ B、末段起点的最高压力等于或小于最后一个压气站的出口压力p1max。The maximum pressure at the beginning of the terminal is equal to or less than the outlet pressure p1max of the last compressor station.

C、末段终点的最低压力p2min应不低于配气站所要求的供气压力。末段的压力变化范围决定了末段的储气能力。The lowest pressure p2min at the end of the terminal shall not be lower than the gas supply pressure required by the distribution station. The pressure range of the terminal determines the gas storage capacity of the terminal.

D、输气管末段的气体处于不稳定流动状态，为简化起见，下面的讨论与计算是以稳定流动状态为基础的，以连续替换法作近似计算，计算结果其储气能力比实际小10~15%。The gas at the end of the gas pipeline is in an unsteady flow state. For the sake of simplification, the following discussion and calculation are based on the stable flow state, and the continuous replacement method is used for approximate calculation. The calculated result shows that the gas storage capacity is 10~15% less than the actual value.