中国电力 ›› 2014, Vol. 47 ›› Issue (12): 42-44.DOI: 10.11930/j.issn.1004-9649.2014.12.42.2

• 发电 • 上一篇    下一篇

电站锅炉小径管内壁裂纹超声波检测

杨建华, 马文民   

  1. 中广核检测技术有限公司,江苏 苏州 215004
  • 收稿日期:2014-07-06 出版日期:2014-12-18 发布日期:2015-12-08
  • 作者简介:杨建华(1980—),男,河南周口人,工程师,从事无损检测工作。E-mail: youngsir_8@126.com

Ultrasonic Inspection on Inner Surface Cracks of Small-Diameter Boiler Tube in Power Plant

YANG Jian-hua, MA Wen-min   

  1. CGNPC Inspection Technology Co., Ltd., Suzhou 215004, China
  • Received:2014-07-06 Online:2014-12-18 Published:2015-12-08

摘要: 为防止锅炉炉管爆漏,采用超声波检测电站锅炉小径管内壁裂纹很有必要。介绍电站锅炉小径管内壁裂纹超声波检测方法;重点论述小径管内壁裂纹超声波检测探头的选择原则,参考试块的制作,灵敏度及扫查灵敏度的选择,验收标准的确定等。以水冷壁螺纹管为例,简要说明螺纹管内壁螺纹产生的伪缺陷波的判别和小径管内壁裂纹波的波形特征。实践表明, 所给出的检测方法有利于提高锅炉小径管内壁裂纹检出率。

关键词: 超声波检测, 电站, 锅炉, 小径管, 内壁裂纹

Abstract: In order to prevent boiler tube explosion and leakage, it is necessary to detect the inner surface cracks of small-diameter boiler tubes using the ultrasonic. This paper introduces the ultrasonic inspection method focusing on the probe selection principles, making of the reference testing blocks, choosing of the sensitivity and scanning sensitivity and the examing standard setting. Taking the water wall tubes as an example, the determination of the false indication of inner tube surface threads and the wave characteristics of the inner surface cracks of small-diameter tubes are briefly described. Practice shows that the given method is helpful to improve the detection rate of the inner surface cracks of small-diameter boiler tubes.

Key words: ultrasonic inspection, power plant, boiler, small-diameter tube, inner surface crack

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