天然气管道的运行可靠性评价技术

TECHNIQUE OF EVALUATING THE RELIABILITY OF NATURAL GAS PIPELINE OPERATION

中国四川省的天然气管网已运行 30年 ,管线老化、腐蚀严重 ,近几年爆管事故频繁 ,严重影响管道安全和正常输气。迫切需要了解和提高管道系统的运行可靠性 ,减少事故 ,延长管道系统的使用寿命。文章论述了天然气管道运行可靠性评价技术理论内容和计算方法 ,给出了天然气管道系统中线路部分、压气站和整个系统可靠性指标的计算公式 ,分析了天然气管道的失效模式和寿命分布模型 。

The gas pipeline network in Sichuan Province has been operated for 30 years and the pipeline safety and normal gas transmission are seriously influenced because of pipeline aging, heavy corrosion and frequent pipe-explosive accidents in recent years. It is in urgent need for declining accidents and lengthening lifetime of the pipeline system to understand and raise the reliability of the pipeline system operation. The theoretical contents and calculation method of the technique of evaluating the reliability of natural gas pipeline operation are stated; the calculation formulas of reliability indexes of the pipeline, compressor station and whole system of the natural gas pipeline network are given out; the failure pattern of natural gas pipeline and its lifetime distribution model are analyzed; and some measures of guaranteeing the reliability of the pipeline system operation are proposed in the paper.