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油气长输管道高钢级管线钢超声应力检测技术探讨
Exploration of ultrasonic stress testing technology for high grade pipeline steel in oil and gas pipeline for long-distance transportation
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- DOI:
- 10.3969/j.issn.1001-2206.2025.05.013
- 作者:
- 王继坤, 姚登樽
WANG Jikun, YAO Dengzun
- 作者单位:
- 1. 国家石油天然气管网集团有限公司西气东输分公司, 上海 200122;2. 中国特种设备检测研究院, 北京 100029;3. 国家市场监督管理总局技术创新中心(油气管道与储存设备安全), 北京 100029
1. PipeChina West East Gas Pipeline Company, Shanghai 200122, China;2. China Special Equipment Inspection & Research Institute, Beijing 100029, China;3. Technology Innovation Center of Oil and Gas Pipeline and Storage Equipment Safety, State Administration for Market Regulation, Beijing 100029, China
- 关键词:
- 临界折射纵波; 零应力声时; 管线钢; 超声应力检测
critically refracted longitudinal wave;stress-free acoustic time;pipeline steel;ultrasonic stress testing
- 摘要:
-
为了实现对管道应力的精确检测，系统探讨温度、耦合剂，以及管线钢的表面粗糙度与平面度等对超声检测的影响，采用超声临界折射纵波（LCR波）应力检测技术，并借助一发双收超声换能器，对X70、X80管线钢进行试验研究，获得其零应力声时分布状态及典型方向的声弹性系数。研究结果表明：X70、X80管线钢呈现明显各向异性，不同方向上的零应力声时差异显著，呈蝴蝶状分布；且同一试样内部零应力声时亦存在较大离散性。鉴于上述现象，现有各向同性和各向异性声弹性理论尚不能完全适用于X70、X80管线钢。因此，应针对该类复杂材料，进一步构建新的理论和技术体系，以解决其各向异性声弹性和零应力声时等关键问题。
In order to achieve accurate detection of pipeline stress, this paper studied the effects of temperature, coupling agent, surface roughness, and flatness on ultrasonic testing. The ultrasonic longitudinal critically refracted wave (LCR) stress detection method was used to test and analyze X70 and X80 pipeline steel with a double receiving ultrasonic transducer. The stress-free acoustic time distribution state and the typical direction of the acoustic elastic coefficient were obtained. The results show that X70 and X80 pipeline steel are an anisotropic material, and there are great differences in the stress-free acoustic time at different directions, distributed in a butterfly-shaped pattern. Moreover, the stress-free acoustic time within the same sample is discrete. To respond to those phenomena, the present acoustic elasticity theory of isotropy and anisotropy fails to be completely applied in X70 and X80 pipeline steel. Therefore, for this type of complex material, new theoretical and technical systems need to be further established to address key issues such as its anisotropic acoustic elasticity and stress-free acoustic time.