液化天然气管道在线检验方法探索与实践  

Exploration and practice of online inspection for LNG pipeline

作　　者：高振[1] 王晓博 赵思思[1] 黄辉[1] 王秀林[1] GAO Zhen;WANG Xiaobo;ZHAO Sisi;HUANG Hui;WANG Xiulin(CNOOC Gas and Power Group Co.,Ltd.,Beijing 100028,China;China Special Equipment Inspection&Research Institute,Beijing 100029,China)

机构地区：[1]中海石油气电集团有限责任公司,北京100028 [2]中国特种设备检测研究院,北京100029

出　　处：《石油化工腐蚀与防护》2022年第1期47-52,56,共7页Corrosion & Protection In Petrochemical Industry

基　　金：中海石油气电集团有限责任公司“基于风险的检验(BRI)技术应用研究(QDKY-2018-YFZX-05)”。

摘　　要：液化天然气(LNG)接收站停机检验会导致断供,因此提出一套"RBI风险分析—CFD模拟—在线检测"在线检验技术方案,以大管径卸料管线为例开展研究。研究表明,引起卸料管线失效的主要原因为内部冲刷;CFD模拟揭示出弯头的外弯处和三通的两管交接处更易产生冲刷;通过红外热成像技术检测保冷层状况,可筛查重点检验部位;瞬变电磁技术能筛选出重点检验部位并进行壁厚测定,验证卸料管线壁厚减薄轻微。"RBI风险分析—CFD模拟—在线检测"在线检验技术方案,基本满足了在役不停输状态下带保冷层LNG管道的检验需求,对于LNG接收站安全、合规运营具有现实意义。Shutdown inspection of liquefied natural gas(LNG) terminal can lead to power failure. Therefore, a set of integrated online inspection technology was proposed, which is called “RBI risk analysis-CFD simulation-online detection”. It is applied by taking large-diameter unloading pipeline as an example. Studies have shown that the main cause of unloading pipeline failure is internal scour;CFD simulation reveals that outer bend of elbow and two pipes junction of tee are prone to scour;key inspection location can be screened by detecting cold keeping layer with infrared imaging technology;key inspection location can be screened and wall thickness can be determined with transient electromagnetic technology. Online inspection technology basically meets inspection requirements of LNG pipeline under in-service condition, and it has practical significance for safe production and compliance operation of LNG terminal.

关 键 词：液化天然气管道 风险分析 CFD模拟 在线检验 

分 类 号：TE973.6[石油与天然气工程—石油机械设备]