Discussion on control of the wall thickness for boiler bent tube extrados

LI Yimin; ZHANG Jianguo; LI Yilong; ZHOU Ning Xi'an Thermal Power Research Institute Co.

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Discussion on control of the wall thickness for boiler bent tube extrados

更新时间：2025-09-28

- Discussion on control of the wall thickness for boiler bent tube extrados
- Thermal Power Generation Vol. 42, Issue 5, Pages: 93-95(2013)
- 作者机构：
  
  西安热工研究院有限公司
- 作者简介：
- 基金信息：
- DOI：
  CLC： TK223.3
- Published：2013
- 稿件说明：
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LI Yimin, ZHANG Jianguo, LI Yilong, et al. Discussion on control of the wall thickness for boiler bent tube extrados[J]. Thermal power generation, 2013, 42(5): 93-95.
DOI：

LI Yimin, ZHANG Jianguo, LI Yilong, et al. Discussion on control of the wall thickness for boiler bent tube extrados[J]. Thermal power generation, 2013, 42(5): 93-95. DOI：

摘要

采用不同标准对1 000MW机组锅炉受热面弯管外弧侧最小需要壁厚Swx

min进行了计算。结果表明:由GB/T 9222和DL/T 5054计算的Swx

min非常接近

且均小于按JB/T 1611或JB/T 6509计算的结果;在制造检验中

应按JB/T 1611—93和JB/T6509—92对弯管外弧侧壁厚进行控制

若壁厚减薄率略大于其规定的控制值

可按GB/T 9222或DL/T 5054的最小需要壁厚控制;对在役锅炉

按DL/T 438执行

但需考虑材料蠕变损伤引起的性能劣化的影响。

Abstract

Different standards were applied to calculate the minimum necessary wall thickness of bent tube extrados for tubes in 1 000 MW unit boilers.The results showed that

the thickness calculated by GB/T 9222 was very close to that by DL/T 5054

and they were both thinner than that by JB/T 1611 or JB/T 6509.During the manufacturing inspection

the thickness of the bent tube extrados should be controlled according to JB/T 1611-93 and JB/T 6509-92.If the wall thickness thinning rate was a little higher than the control value in JB/T 1611-93 and JB/T 6509-92

the thickness of the bent tube extrados can be controlled according to the minimum necessary thickness calculated by GB/T 9222 or DL/T 5054.For the in-service running boilers

the thickness of the bent tube extrados can be controlled according to DL/T 438

but the performance deterioration caused by creep damage of the material should be considered.

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