Reason analysis on leakage of T92 steel tube in an ultra supercritical boiler and the countermeasures

LI Shunhua; HU Ping; MA Qingzeng Electric Power Research Institute of Guangdong Power Grid Corporation

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Reason analysis on leakage of T92 steel tube in an ultra supercritical boiler and the countermeasures

Thermal Power Generation Vol. 42, Issue 1, Pages: 94-96(2013)

更新时间：2025-09-28

- Reason analysis on leakage of T92 steel tube in an ultra supercritical boiler and the countermeasures
- 作者机构：
  
  广东电网公司电力科学研究院
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM621.2
- Published：2013
- 稿件说明：
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LI Shunhua, HU Ping, MA Qingzeng Electric Power Research Institute of Guangdong Power Grid Corporation. Reason analysis on leakage of T92 steel tube in an ultra supercritical boiler and the countermeasures[J]. Thermal Power Generation, 2013, 42(1): 94-96.
DOI：

LI Shunhua, HU Ping, MA Qingzeng Electric Power Research Institute of Guangdong Power Grid Corporation. Reason analysis on leakage of T92 steel tube in an ultra supercritical boiler and the countermeasures[J]. Thermal Power Generation, 2013, 42(1): 94-96. DOI：

摘要

针对某超超临界机组锅炉二级过热器T92钢管泄漏问题

通过渗透检测、化学成分分析、力学性能测试、金相分析、扫描电镜及能谱分析等方法对其原因进行了分析

认为该钢管内壁在制造过程已产生裂纹

该裂纹在锅炉运行的高温高压条件下沿底部和端部扩展穿透整个壁厚

进而导致了泄漏。

Abstract

Leakage occurred on a T92 steel tube of two-stage superheater in an ultra supercritical boiler.Several tests such as penetration testing

chemical composition analysis

mechanical properties testing

metallographic analysis

scanning electron microscope(SEM) and energy spectrum were performed to find out the reason.The results showed that

the crack on inner wall of the tube had been already formed during manufacturing process

it spread along bottom and end of the tube under high pressure and temperature and finally passed through the entire wall causing the leakage.Some countermeasures were given.

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