薄壁碳钢管高精度超声测厚误差产生原因

详细信息

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。
- 薄壁碳钢管 /
- 超声测厚 /
- 表面粗糙度
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.
- Thin wall carbon steel pipe /
- Ultrasonic thickness measurement /
- Surface roughness

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