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合适的运行压力对于保证天然气长输管道的安全生产至关重要。管道运行压力的选择应遵循以下原则:第一,出现故障时,能够做到上下游统筹兼顾;第二,建立管道允许运行的压力区间;第三,选定管道正常运行的压力区间;第四,确定不同岗位允许控制的压力区间。珠海-中山天然气管道设计最高运行压力为7.1MPa,根据用户需求调整最低运行压力,当管道正常运行时,最低运行压力为4.5MPa;当上游中断供气时,将最低运行压力调整为4.67MPa;当下游用户中断用气时,最高运行压力按照6.3MPa进行管理和控制。同时,管道运行压力的选择还需要考虑台风、设备故障等因素。管道输送企业进行运行压力局部调节的作用是极为有限的,为适应天然气产业链条化的发展现状,应建立从生产到最终用户的快速、有效的协调机制。
Appropriate operating pressure is essential to ensure the safe production of natural gas long-distance pipelines. The choice of pipeline pressure should follow the following principles: First, in the event of failure, to achieve both upstream and downstream; Second, the establishment of pipeline allowed to run the pressure range; Third, the selected pipeline pressure range of normal operation; Fourth , To determine the pressure of different positions allowed to control the interval. Zhuhai - Zhongshan natural gas pipeline design maximum operating pressure of 7.1MPa, according to user needs to adjust the minimum operating pressure, when the normal operation of the pipeline, the minimum operating pressure of 4.5MPa; when the upstream interrupt gas supply, the minimum operating pressure is adjusted to 4.67MPa; When downstream users interrupt gas, the maximum operating pressure in accordance with 6.3MPa management and control. At the same time, the choice of pipeline operating pressure also need to consider typhoon, equipment failure and other factors. Pipeline transportation companies to adjust the role of local pressure is very limited, in order to adapt to the development of the natural gas industry chain, should be established from the production to the end user fast and effective coordination mechanism.