超大输量天然气管道工艺方案筛选

Selection of transmission program for super-throughput gas pipeline

借鉴国外超大输量天然气管道输送方案的研究成果，从提高输送效率的几个主要方面入手，结合以后可能出现的单管输送300×10^8m^3／a和450×10^8m^3／a的输量情况，以3000km长度为基准，对设计压力10-20SPa、管径1016～1422mm、钢级X80~X100的天然气管道，进行工艺方案的经济费用匡算，筛选出经济性较优的方案。对板材和钢管的生产加工、钢管的止裂韧性、阀门设备等影响工程建设的关键控制性因素进行调研，筛选1422mm、X80、12MPa为较可行的方案，并建议对此方案开展深入研究。（表11，图5，参4）

By referring to international research fruits from transmission programs for super-throughput gas pipelines, this paper starts with main aspects regarding transmission efficiency improvements, integrates possible situations of single pipeline （planned capacity at 300×10^8m^3/a and 450×10^8m^3/a） in the future, takes 3 000 km as a length datum, roughly estimates economic costs of natural gas lines with a design pressure of 10-20 MPa, a diameter of 1 016-1 422 mm, and X80-X100, and finally optimizes the most economic program. Subsequently, multiple key control factors influencing engineering construction （production and processing of steel sheets and pipes, arrest toughness of steel pipes, and valves） are analyzed, the program to be selected for the pipeline with a diameter of 1 422 mm, X80 and a working pressure of 12 MPa is thought feasible, and a profound research on the program is proposed. （11 Tables, 5 Figures, 4 References）