Life prediction of superheater tubes with steam side deposition of oxide scale

HUANG Xin1; DING Keqin2; ZHAO Jun1 1.College of Mechanical Engineering

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Life prediction of superheater tubes with steam side deposition of oxide scale

更新时间：2025-09-28

- Life prediction of superheater tubes with steam side deposition of oxide scale
- Thermal Power Generation Vol. 42, Issue 7, Pages: 88-91(2013)
- 作者机构：
  
  1. 北京化工大学机电工程学院
  2. 中国特种设备检测研究院
- 作者简介：
- 基金信息：
- DOI：
  CLC： TK223.32
- Published：2013
- 稿件说明：
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HUANG Xin1, DING Keqin2, ZHAO Jun1 1.College of Mechanical Engineering. Life prediction of superheater tubes with steam side deposition of oxide scale[J]. Thermal power generation, 2013, 42(7): 88-91.
DOI：

HUANG Xin1, DING Keqin2, ZHAO Jun1 1.College of Mechanical Engineering. Life prediction of superheater tubes with steam side deposition of oxide scale[J]. Thermal power generation, 2013, 42(7): 88-91. DOI：

摘要

利用有限元软件计算了某电厂TP347H末级过热器弯管在管内不同氧化皮堆积厚度下的管壁温度

通过修正常数项的Larson-Miller公式

计算出不同置信度下过热器管的应力-时间温度参数曲线

据此预测一定置信度下过热器管在不同氧化皮堆积厚度下的使用寿命

并利用Robinson法则确立管材失效的准则

对氧化皮堆积程度进行分级评价。结果表明:在0.95的置信度下

当TP347H过热器管氧化皮厚度5mm时

为轻度堵塞

材料使用寿命在10万h以上;当氧化皮厚度为5～9mm时

为中度堵塞

使用寿命仅为几万小时左右;当氧化皮堵管厚度≥9mm时

为重度堵塞

使用寿命将低于1万h。

Abstract

The finite element software was employed to calculate the wall temperature of final superheater elbow(which using TP347Haustenitic stainless steel as the material)with different thicknesses of oxide scale inside the tubes.By the Larson-Miller formula with revised constant term

the stress-time curves of superheater tube under different confidence levels and temperatures were calculated.Then the service life of superheater tubes with different oxide scale thicknesses under a certain confidence level was predicted.The criterion of material failure was established by the Robinson method to conduct grading evaluation on the accumulation degree of oxide scale.The results showed that

with the confidence level of 0.95

when the TP347Hsuperheater tube’s oxide scale was thinner than 5mm

the service life of the material was longer than 1.0×105 hours and the blocking inside the pipe was mild;when the oxide scale was thicker than 5mm but thinner than 9mm

the service life of the material was only dozens of thousand hours and the blocking was intermediate;when the oxide scale was thicker than 9mm

the service life of the material will be shorter than 1.0×104 hours and the blocking was serious.

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