摘要
为了提高管道输送效率,在西气东输三线西段一级地区的天然气管道上首次采用了0.8设计系数。按照设计要求,较高设计系数管道强度试压产生的环向应力应不小于100%SMYS,对于如此高的试压强度,国内尚无经验可循,为了保障高强度水压试验的顺利进行,参考国内外规范,并结合0.8设计系数管道的特点,编制了高强度水压试验方案并制定了试压流程,试压过程中首次采用p-V曲线、应力应变监测、智能变形检测等手段全方位监测试压过程中管道的膨胀变形情况。试验结果证明,试压方案科学合理。高强度水压试验的成功,为较高设计系数天然气管道的高强度水压试验积累了宝贵经验,为在一级地区推广采用0.8设计系数奠定了良好的实践基础。
To enhance the efficiency of pipeline transmission, a 0.8 design factor has been, for the first time in China, adopted on natural gas pipelines in Class I areas in western section of the 3rd West-to-East Gas Pipeline. According to the design requirements, circumferential stresses generated during pressure tests at relatively high design factor shall be no less than 100% SMYS. There is no domestic experience for pressure tests with such high intensities. To ensure proper implementation of heavy-duty hydraulic tests and with consideration to available codes and features of the 0.8 design factor, program for heavy-duty hydraulic tests and process flow for pressure tests have been prepared, p-V curves, stressstrain monitoring, intelligent deformation detection and other techniques have been deployed for the first time to monitor expansion and deformation of pipelines during pressure tests. Test results show first heavy-duty hydraulic tests for natural gas pipelines with the 0.8 design factor in Class I areas of China are successful with pressure test program proved to be scientific and rational. Successful execution of these heavy-duty hydraulic tests may provide future heavy-duty hydraulic tests of natural gas pipelines with high design factor with valuable experiences. In addition, they may establish solid foundation for promotion of the 0.8 design factor in Class I areasJn China. （6 Figures, 4 Tables, 10 References）
出处
《油气储运》
CAS
北大核心
2015年第5期557-561,共5页
Oil & Gas Storage and Transportation
关键词
0.8设计系数
试压
方案
应用
P-V曲线
智能变形检测
应力应变监测
the 0.8 design factor, pressure test, program, application, p-V curve, intelligent deformation detection, stress- strain monitoring
