输油管道超设计压力运行的几个关键问题

发布时间：2017-12-28 01:36

本文关键词：输油管道超设计压力运行的几个关键问题　出处：《油气储运》2016年11期 　论文类型：期刊论文

【摘要】：为保证输油管道超设计压力运行的安全,针对钢管力学性能、管道临界缺陷尺寸、环焊缝质量验证3个影响管道承压的重要因素,在管道沿程压力计算基础上,开展了管材小试样屈服强度统计与试验、钢管实物屈服强度与小试样屈服强度差异性分析、管道临界缺陷尺寸计算与内检测精度分析、环焊缝性能验证方案的研究。研究表明:钢管实物屈服强度与管材最小要求屈服强度之比即为最大运行压力与设计压力之比;由于压力升高,管道运行时允许的缺陷尺寸减小,其中大于临界尺寸的缺陷应保证被现有管道内检测器发现,否则应降低运行压力从而增大临界缺陷尺寸值;超设计压力运行前,应进行一次相应强度的现场试压,排除环焊缝异常。
[Abstract]:In order to ensure the safety of oil pipeline design pressure super operation, an important factor for mechanical properties of pipe, pipe critical flaw sizes, girth weld quality verification 3 pipeline pressure in the pipeline, the pressure calculation on the basis of research carried out small sample statistics and the yield strength of pipe pipe test, yield strength and yield strength of small specimens difference analysis, performance analysis, program verification accuracy calculation and weld detection in pipeline critical flaw size. Research shows that the yield strength of pipe and pipe the minimum requirements for the maximum operating pressure and design pressure ratio yield strength ratio; because the pressure increased, defect size allows the pipeline operation is reduced, which is larger than the critical size defect should be guaranteed by the existing pipeline detector, or should be reduced so as to increase the critical operating pressure the size of defects; design of the super pressure before the operation, should be a corresponding field strength test pressure, eliminate abnormal ring weld.
【作者单位】：中国石油集团石油管工程技术研究院/中国石油天然气集团公司石油管工程重点实验室;西安三环科技开发总公司;中国石油西部管道公司;
【分类号】：TE973
【正文快照】： 节能降耗一直是管道运输行业关注的重点,在管道输油过程中,通过增加上游泵站压力和停用某些下游泵站的方法,来达到节能降耗的目的,但该方法会使得管道的某些地段可能出现超过设计压力的情况。另外,某些管道由于上游来油量增大,不得不使管道在超设计压力下运行来满足输送任务。

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