“西气东输”工程天然气长输管道内外涂层技术经济分析

TECHNO-ECONOMIC ANALYSIS OF THE INTERNAL AND EXTERNAL COATINGS OF LONG-DISTANCE GAS TRANSMISSION PIPELINE IN“WEST-TO-EAST NATURAL GAS TRANSMISSION” PROJECT

西部大开发是我国国民经济建设的一个新战略 ,“西气东输”工程是西部大开发第一号工程。西气东输工程将要建设从新疆至上海的大口径长输天然气管线 ,管线的内外涂层体系是西气东输工程的基本构成之一 ,涂层质量的好坏 ,关系到长输管线长期安全稳定运行 ;涂层结构的优化程度 ,关系到是否能经济高效地进行管道工程建设。因此 ,天然气长输管道内外涂层技术经济分析 ,是目前我国石油工程决策界、技术界十分关注的热点问题。针对该长输管道 ,本文介绍了通过管道内涂层改善天然气流动效率 ,从而提高管输能力 ,并防止内壁腐蚀的经济效益。

The western region development is a new strategy of the national economic construction in China and the ' West-to-east Natural Gas Transmission' project is the number one engineering in the western region development. A major diameter long-distance gas transmission pipeline from Xinjiang to Shanghai will be constructed in the west-to-east natural gas transmission engineering and the internal-external coating system of the pipeline is one of basic constituent of the west-to-east natural gas transmission engineering. The quality of the coating is related to a long-term, safe and stable running of the long-distance gas transmission pipeline and the degree of optimization of coating structure is related to whether the pipeline engineering can be constructed economically and high-effectively. Therefore the techno-economic analysis of the internal and external coatings of the long-distance gas transmission pipeline is a hot spot followed with great interest by the policy-making circles and technological circles of petroleum engineering in China at present. In view of such a long-distance gas transmission pipeline, it is pointed out by the author that through making the internal coating in the pipeline, the gas flow condition is improved so as to raise pipeline throughout, guard against inwall corrosion and increase economic returns. Meanwhile the kinds of the external corrosion prevention coating and how to choose the economic and applicable external corrosion prevention coating according to the concrete conditions of the pipeline crossing regions are introduced in the paper.