Abstract: Gas storage of pipeline end is used to overcome the unbalance of gas consumption round the clock. As the users undulatory gas consumption at the end of pipeline day and night causes the unsteady gas flow in pipeline end, this paper applies the gas unsteady flow equation to calculate the length and diameter of pipeline end. After comparing the results by the unsteady gas flow calculating method with those by the steady gas flow calculating method, it is shown that the pipeline end determined according to steady gas flow calculating method could not meet the demands of overcoming unbalance of gas consumption the clock round sometimes.

Key words: Gas pipeline, Length, Diameter of pipe, benefit of end