长输管道冬季水压试验风险分析及控制措施  

Risk analysis and control measures of hydrostatic testing in winter for long-distance pipeline

作　　者：安治国[1] 

机构地区：[1]中国石油天然气管道局国内事业部,河北廊坊065000

出　　处：《油气储运》2015年第11期1231-1235,共5页Oil & Gas Storage and Transportation

摘　　要：为解决长输管道冬季低温水压试验易发生冰冻堵管、胀管破裂等高危风险问题,保证冬季施工进度及投产后的运行安全,结合热工原理进行建模计算,根据施工区域环境温度、地质情况、管材参数、保温结构等因素对冻结时间进行计算预测,对风险程度进行分析,从而为科学地选取保温防护控制措施提供理论依据。结合某长输管道工程实例,应用热工计算模型,对拟试验管道冻结时间进行了较为准确的计算,结果表明:根据预测冻结时间,针对埋地管道、架空裸露管道等不同施工区段,采取地温监测、地面保温、裸管加热等技术措施,保证了管道试压的安全和质量。During hydrostatic testing of long-distance pipelines in winter, pipes are often subject to blockage due to freezing or rupture after expansion at low temperature. In order to avoid these high risks and ensure the operation progress in winter and subsequently the safety after commissioning, the freezing time is predicted by modeling calculation as per the thermo- technical principles and based on ambient temperature, geological conditions, pipe parameters, insulation structure and other factors, and the risk possibility is analyzed, so as to provide a theoretical basis for scientifically selecting insulation, protection and control measures. Taking the long-distance pipeline project in Beijing as an example, its possible freezing time in hydrostatic testing is calculated accurately using the thermo-technical model. The results show that, according to the predicted freezing time, such technical measures as ground temperature monitoring, aboveground insulation and bare pipe heating are successfully adopted in different sections （e.g. buried pipelines and overhead bare pipelines） to guarantee the safety and quality.

关 键 词：长输管道 冬季水压试验 风险分析 控制措施 

分 类 号：TE89[石油与天然气工程—油气储运工程]