作者：成志强1, 李荣光2, 李璐3, 赵康宁4, 罗涵睿1
作者单位：1. 西南交通大学力学与航空航天学院, 四川 成都 610031;
2. 国家管网集团北方管道公司, 河北 廊坊 065000;
3. 苏州燃气集团公司, 江苏 苏州 215031;
4. 中石油冀东油田公司唐山冀油瑞丰化工有限公司, 河北 唐山 063205
关键词：管道;X射线衍射法;应力测试;可重复性;可再现性
摘要：
为验证X射线衍射法对于野外在役管道应力测试的适用性，首先重复测试铁粉、钢块、钢条和钢管的残余应力，分别验证X射线应力测试的可重复性。然后通过对比测试圆周域内9点的应力，分析测试点位置对应力测试结果的影响。再通过对比3个月前后的应力测试结果，观察测试时间间隔对应力测试的影响。最后分别采用等强度梁、静压全尺寸管道、悬臂弯曲的全尺寸管道开展加载试验，验证X射线应力测试的精度范围。试验结果表明，X射线重复性测试的最大差值为15.6 MPa。微小位置偏差对应力测试的影响范围在±30 MPa以内。3个月前后应力测试的最大差异值为30.7 MPa。等强度梁试验中，随着载荷增加，应力增量的理论计算值和X射线测试值的斜率几乎相同，应力增量最大偏差仅7.1 MPa。全尺寸管道静压试验中，X射线应力测试值与应变片环向应力测试值的最大差值为9.4 MPa。全尺寸管道弯曲试验中，X射线应力测试值与应变片轴向应力测试值的最大差值为17.9 MPa。以上试验结果表明，X射线衍射法应力测试的可重复性、可再现性和精度均可以满足在役油气管道应力测试的要求。
Stress testing of in-service full-scale pipeline based on X-Ray
CHENG Zhiqiang, LI Rongguang, LI Lu, ZHAO Kangning, LUO Hanrui
1. School of Mechanics and Aerospace Engineering, Southwest Jiaotong University, Chengdu 610031, China;
2. North Pipeline Company of PIPECHINA, Langfang 065000, China;
3. Suzhou Gas Group Company, Suzhou 215031, China;
4. Tangshan Jiyouruifeng Chemical Co., Ltd., Jidong Oil Field Company of Petro China, Tangshan 063205, China
Abstract: In order to verify the applicability of X-ray diffraction method for stress testing of field pipelines in service, the residual stresses of iron powder, steel block, steel bar and steel pipe are tested repeatedly to verify the repeatability of X-ray stress testing respectively. Then, by comparing the stress of nine points in the test circle, the influence of the location of the test points on the stress test results is analyzed. Then by comparing the stress test results before and after three months, to observe the impact of the test time interval on the stress test. Finally, loading tests were carried out with equal strength beams, static pressure full-size pipes and cantilever bending full-size pipes to verify the accuracy range of X-ray stress testing. The test results show that the maximum difference of X-ray repeatability test is 15.6 MPa. The influence range of small position deviation on stress test is within ± 30 MPa. The maximum difference value of stress test before and after three months is 30.7 MPa. In the equal strength beam test, with the increase of load, the slopes of stress increment of the theoretical calculated value and the X-ray test value are almost the same, and the maximum deviation of stress increment is 7.1 MPa. In the static pressure test of full-scale pipeline, the maximum difference between the X-ray stress test value and the circumferential stress test value of strain gauge is 9.4 MPa. In the full-scale pipe bending test, the maximum difference between the X-ray stress test value and the axial stress test value of the strain gauge is 17.9 MPa. The above test results show that the repeatability, reproducibility and accuracy of X-ray diffraction stress test can meet the requirements of in-service oil and gas pipeline stress test.
Keywords: pipeline;X-ray diffraction;stress test;repeatability;reproducibility
2023, 49(9):7-12 收稿日期: 2021-1-5;收到修改稿日期: 2021-4-7
基金项目: 教育部高等学校博士点专项科研基金资助项目（20110184110017）
作者简介: 成志强（1969-），男，四川成都市人，教授，博士，主要从事数字孪生管道及修复方向的研究。
参考文献
[1] 祝悫智, 段沛夏, 王红菊. 全球油气管道建设现状及发展趋势[J]. 油气储运, 2015, 34(12): 1262-1266
[2] 邵煜. 埋地管道的失效机理及其可靠性研究[D]. 杭州: 浙江大学, 2008.
[3] SMITH M, LEVESQUE J B, BICHLER L, et al. Residual stress analysis in linear friction welded in-service Inconel 718 superalloy via neutron diffraction and contour method approaches[J]. Materials Science and Engineering:A, 2017, 691: 168-179
[4] 王国庆. 基于磁记忆的油气管道应力损伤检测机理及应用研究[D]. 沈阳: 沈阳工业大学, 2017.
[5] 徐春广, 王俊峰, 宋剑峰, 等. 油气管道焊接残余应力超声无损检测与原位调控技术[J]. 石油科学通报, 2016, 1(3): 442-449
[6] 祝鹏飞. X射线检测7N01铝合金残余应力参数优化[D]. 成都: 西南交通大学, 2016.
[7] PREUSS M, FONSECA J Q, STEUWER A. Residual stresses in linear friction weldedIMI550[J]. Journal of Neutron Research, 2004, 12(1-3): 165-173
[8] 苟国庆, 黄楠, 陈辉, 等. X射线衍射法测试高速列车车体铝合金残余应力[J]. 西南交通大学学报, 2012, 47(4): 618-622
[9] 李磊, 林鹏程. 基于X射线衍射法的球形储罐残余应力检测工艺研究[J]. 中国特种设备安全, 2019, 35(10): 70-73
[10] 许光, 邢力超, 张婷, 等. X射线衍射法测量高温合金波纹管残余应力[J]. 压力容器, 2021, 38(7): 32-37
[11] 任建亮. 某型号X射线应力仪数据的MSA分析[D]. 太原: 中北大学, 2015.
[12] 沈飞, 王辉, 张广, 等. 脉冲X光摄影法测量柱壳内爆膨胀速度的研究[J]. 中国测试, 2020, 46(1): 29-33
[13] 闫志国, 喻晓明, 唐彩燕, 等. X射线安检仪性能检测研究[J]. 中国测试, 2015, 41(1): 117-119
[14] 廖立兵, 李国武. X射线衍射方法与应用[M]. 北京: 地质出版社, 2008: 37-46.
