ANALYSIS OF CLAMPING TUBE LEAKAGE FOR REAR PLATEN SUPERHEATER OF THE BOILER

LI Xichao; ZHANG Lifeng; DUAN JiangShaanxi Electric Power Science Research Institute

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ANALYSIS OF CLAMPING TUBE LEAKAGE FOR REAR PLATEN SUPERHEATER OF THE BOILER

Thermal Power Generation Vol. 39, Issue 10, Pages: 104-107(2010)

更新时间：2025-09-28

- ANALYSIS OF CLAMPING TUBE LEAKAGE FOR REAR PLATEN SUPERHEATER OF THE BOILER
- 作者机构：
  
  陕西电力科学研究院
- 作者简介：
- 基金信息：
- DOI：
  CLC： TK223.32
- Published：2010
- 稿件说明：
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LI Xichao, ZHANG Lifeng, DUAN JiangShaanxi Electric Power Science Research Institute. ANALYSIS OF CLAMPING TUBE LEAKAGE FOR REAR PLATEN SUPERHEATER OF THE BOILER[J]. Thermal Power Generation, 2010, 39(10): 104-107.
DOI：

LI Xichao, ZHANG Lifeng, DUAN JiangShaanxi Electric Power Science Research Institute. ANALYSIS OF CLAMPING TUBE LEAKAGE FOR REAR PLATEN SUPERHEATER OF THE BOILER[J]. Thermal Power Generation, 2010, 39(10): 104-107. DOI：

摘要

对某电厂2045t/h锅炉后屏过热器泄漏的夹持管进行了宏观检验、裂纹分析、化学成分分析、拉伸性能试验、显微硬度试验、金相组织分析、晶间腐蚀试验等。结果表明

后屏过热器夹持管泄漏的原因为蒸汽侧晶间腐蚀开裂。首先在夹持管弯头中性面的内壁处产生晶间腐蚀裂纹

随后沿管壁厚度方向沿晶扩展

直至穿透泄漏。

Abstract

The causes of clamping tube leakage for rear platen superheater of a 2 045 t/h boiler in one power plant have been analysed by using methods of macroscopic inspection

crack analysis

chemical elements analysis

tensile strength analysis

microscopic hardness test

metallographic structure analysis

intergranular corrosion test

etc..The results show that the clamping tube leakage of rear platen superheater is caused by intergranular corrosion cracking on the steam side.Firstly the intergranular corrosion cracks happened at inner wall of middle profile in elow of the clamping tube

and then extended along grain in direction of the tube wall thickness untill penetration leakage.

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