薄壁碳钢管高精度超声测厚误差产生原因
The Cause of High Accuracy Ultrasonic Thickness Measurement Error of Thin Walled Carbon Steel Pipe
摘 要
针对某核电厂薄壁碳钢管高精度超声测厚数据误差的问题，通过理论分析、试验验证和现场验证，证明了管道内表面粗糙度、探头阻尼系数和超声波衰减周期数是误差产生的主要原因，并推荐了表面粗糙度高的薄壁碳钢管高精度超声测厚探头的选取原则以及对试块表面粗糙度的要求。
超声测厚
表面粗糙度
Thin wall carbon steel pipe
Ultrasonic thickness measurement
Surface roughness
Abstract
This paper aims to analyze errors of the high accuracy ultrasonic thickness measurement of thin walled carbon steel pipe in one nuclear power plant. Through theoretical analysis, test verification and site verification, it is verified that the main reasons of error are due to the pipe inner surface roughness, the probe damping and wave attenuation pulse cycles. The principle for selection of high accuracy thickness measuring probe for thin walled carbon steel pipe with rough inner surface is recommended and the requirement for specimen surface roughness is introduced.
中图分类号 TG115.28 TL48 DOI 10.11973/wsjc201703020
所属栏目 实践经验
基金项目
收稿日期 2016/10/5
修改稿日期
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备注商俊敏(1979-),男,高级工程师,硕士,主要从事核电厂在役检查工作。
引用该论文: SHANG Jun-min. The Cause of High Accuracy Ultrasonic Thickness Measurement Error of Thin Walled Carbon Steel Pipe[J]. Nondestructive Testing, 2017, 39(3): 80～82
商俊敏. 薄壁碳钢管高精度超声测厚误差产生原因[J]. 无损检测, 2017, 39(3): 80～82
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参考文献
【1】梁鹏飞,张继荣,匡立中,等.核电压力管道表面粗糙度对超声波测厚数据的影响[J].无损检测,2013,35(9):49-51.
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