低频导波在场站管道检测中的应用研究

Apply low-frequency ultrasonic guided wave testing system to inspect pipelines in gas station

针对输气场站内管道敷设环境复杂,一直没有有效的手段进行100%的全面检测这一状况,引进英国GUL公司的WaveMaker G3低频导波检测系统对中国石油西南油气田公司的某场站输气管道进行了检测试验,来验证系统检测灵敏度、缺陷定位准确度、检测距离和检测缺陷类型等性能指标。试验表明:WaveMaker G3低频导波检测系统可以检出管道局部腐蚀以及壁厚减薄情况,并通过对典型的特征信号如焊缝等的识别可以实现对缺陷准确定位,从而掌握管道的整体腐蚀状况,为各大油气田的场站管道、集输管道以及长输管道的维护决策提供技术支持。

There is no effective means for wholly comprehensive inspection of pipelines in the gas station because of the complex laying environment. In response to this situation, the UK GUL＇s WaveMaker G3 low-frequency ultrasonic guided wave testing system was introduced. In order to check the performances of this system, such as detection sensitivity, defects positioning accuracy, detection range and type of defect, and so on, the experiment of inspecting pipelines was carried in the gas station of PetroChina Southwest Oil ＆ Gas Field Company. The test results showed that WaveMaker G3 low-frequency ultrasonic guided wave testing system can be used for inspecting the location of corrosion and the decrease of wall thickness. It also can position the defects precisely through identifying the typical characteristics signal, e.g., welds ete. Thus, the corrosion of the whole pipeline can be inspected. It will provide a strong technical support for detecting and evaluating the station pipelines, gathering ＆ transportation pipelines and long- distance pipelines in oil and gas fields.