摘要
国内外规范详细规定了天然气管道强度试压及严密性试压的操作过程,但对于试压后管道内积水的排放操作未给出具体规定,当长距离输气管道穿越复杂地形时,比地势平缓地区的管道在建设及运行中存在更多问题,管道强度试压和严密性试压之后的排水就是其中之一。分析了管道分段试压原则,介绍了排水过程中清管器的运动模型和管内可能存在的不满流流动状态。基于理论研究和试验研究开发了适用于各类地形条件下试压排水的模拟软件,并对现场试压排水过程进行模拟计算,其结果与现场结果吻合较好,该软件可为其他管道试压排水工程提供指导。
Relevant regulations in China and abroad specify the detailed procedures of pressure test in tightness and strength of gas pipelines, but no information about drainage of water accumulated in the pipelines after pressure test. There would be more problems in construction and operation when long-distance gas pipeline passes through complex terrain than gentle areas, including drainage after pressure test for strength and tightness. This paper discusses the principle of segmental pressure test, and presents the motion model of pig and status of slack flow in pipe during drainage. Moreover, simulation software has been developed for pressure test and drainage under different terrains on the basis of theoretical research and tests. Analog calculation is made for the field pressure test and drainage, deriving the results that fit well with field results. This software can provide a guidance to the pressure test and drainage of other pipelines.
出处
《油气储运》
CAS
2014年第12期1326-1330,共5页
Oil & Gas Storage and Transportation
基金
国家科技重大专项课题资金资助项目"煤层气田集输系统优化技术"
2011ZX05039-002
关键词
长距离输气管道
试压排水
复杂地形
压力脉冲
long-distance gas pipeline
drainage after pressure test
complex terrain
pressure impulse
