Residual lifetime assessment of cold-reheater pipe in coal-fired power plant through accelerated degradation test

Myung Yeon Kim, Dong Ju Chu, Young-Kook Lee, Jae Hyeok Shim, Woo Sang Jung

Research output: Contribution to journalArticle

Abstract

Non-destructive testing (NDT) is the process of evaluating and inspecting materials without damage. The purpose of present study is to evaluate the residual lifetime of materials by proposing a new concept of non-destructive testing. The residual lifetime of service-exposed 1.25Cr-0.5Mo (P11) steel cold-reheater pipes in a coal-fired power plant, which were used for approximately 23 years at 310 °C, was investigated with accelerated degradation tests of a fresh P11 steel. The hardness and the microstructure of the P11 steel aged at 550 °C for 1000 h were similar to those of the service-exposed cold-reheater pipe. The creep-rupture tests of the steel aged at 550 °C for 1000 h were performed under various temperature and stress conditions together with the fresh steel. The creep-rupture properties analyzed using a Larson–Miller parameter (LMP) approach suggested that the residual lifetime of the service-exposed pipes is approximately 53% at the current conditions. The proposed methodology is expected to serve as a useful tool to check the timing of materials replacement and to maintain safety in a coal-fired power plant.

Original languageEnglish
Pages (from-to)330-335
Number of pages6
JournalReliability Engineering and System Safety
Volume188
DOIs
Publication statusPublished - 2019 Aug 1

Fingerprint

Power plants
Pipe
Coal
Degradation
Steel
Nondestructive examination
Creep
Hardness
Microstructure
Temperature

All Science Journal Classification (ASJC) codes

  • Safety, Risk, Reliability and Quality
  • Industrial and Manufacturing Engineering

Cite this

@article{95405cdc1de748ef9625cc9d36bc43ee,
title = "Residual lifetime assessment of cold-reheater pipe in coal-fired power plant through accelerated degradation test",
abstract = "Non-destructive testing (NDT) is the process of evaluating and inspecting materials without damage. The purpose of present study is to evaluate the residual lifetime of materials by proposing a new concept of non-destructive testing. The residual lifetime of service-exposed 1.25Cr-0.5Mo (P11) steel cold-reheater pipes in a coal-fired power plant, which were used for approximately 23 years at 310 °C, was investigated with accelerated degradation tests of a fresh P11 steel. The hardness and the microstructure of the P11 steel aged at 550 °C for 1000 h were similar to those of the service-exposed cold-reheater pipe. The creep-rupture tests of the steel aged at 550 °C for 1000 h were performed under various temperature and stress conditions together with the fresh steel. The creep-rupture properties analyzed using a Larson–Miller parameter (LMP) approach suggested that the residual lifetime of the service-exposed pipes is approximately 53{\%} at the current conditions. The proposed methodology is expected to serve as a useful tool to check the timing of materials replacement and to maintain safety in a coal-fired power plant.",
author = "Kim, {Myung Yeon} and Chu, {Dong Ju} and Young-Kook Lee and Shim, {Jae Hyeok} and Jung, {Woo Sang}",
year = "2019",
month = "8",
day = "1",
doi = "10.1016/j.ress.2019.03.043",
language = "English",
volume = "188",
pages = "330--335",
journal = "Reliability Engineering and System Safety",
issn = "0951-8320",
publisher = "Elsevier Limited",

}

Residual lifetime assessment of cold-reheater pipe in coal-fired power plant through accelerated degradation test. / Kim, Myung Yeon; Chu, Dong Ju; Lee, Young-Kook; Shim, Jae Hyeok; Jung, Woo Sang.

In: Reliability Engineering and System Safety, Vol. 188, 01.08.2019, p. 330-335.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Residual lifetime assessment of cold-reheater pipe in coal-fired power plant through accelerated degradation test

AU - Kim, Myung Yeon

AU - Chu, Dong Ju

AU - Lee, Young-Kook

AU - Shim, Jae Hyeok

AU - Jung, Woo Sang

PY - 2019/8/1

Y1 - 2019/8/1

N2 - Non-destructive testing (NDT) is the process of evaluating and inspecting materials without damage. The purpose of present study is to evaluate the residual lifetime of materials by proposing a new concept of non-destructive testing. The residual lifetime of service-exposed 1.25Cr-0.5Mo (P11) steel cold-reheater pipes in a coal-fired power plant, which were used for approximately 23 years at 310 °C, was investigated with accelerated degradation tests of a fresh P11 steel. The hardness and the microstructure of the P11 steel aged at 550 °C for 1000 h were similar to those of the service-exposed cold-reheater pipe. The creep-rupture tests of the steel aged at 550 °C for 1000 h were performed under various temperature and stress conditions together with the fresh steel. The creep-rupture properties analyzed using a Larson–Miller parameter (LMP) approach suggested that the residual lifetime of the service-exposed pipes is approximately 53% at the current conditions. The proposed methodology is expected to serve as a useful tool to check the timing of materials replacement and to maintain safety in a coal-fired power plant.

AB - Non-destructive testing (NDT) is the process of evaluating and inspecting materials without damage. The purpose of present study is to evaluate the residual lifetime of materials by proposing a new concept of non-destructive testing. The residual lifetime of service-exposed 1.25Cr-0.5Mo (P11) steel cold-reheater pipes in a coal-fired power plant, which were used for approximately 23 years at 310 °C, was investigated with accelerated degradation tests of a fresh P11 steel. The hardness and the microstructure of the P11 steel aged at 550 °C for 1000 h were similar to those of the service-exposed cold-reheater pipe. The creep-rupture tests of the steel aged at 550 °C for 1000 h were performed under various temperature and stress conditions together with the fresh steel. The creep-rupture properties analyzed using a Larson–Miller parameter (LMP) approach suggested that the residual lifetime of the service-exposed pipes is approximately 53% at the current conditions. The proposed methodology is expected to serve as a useful tool to check the timing of materials replacement and to maintain safety in a coal-fired power plant.

UR - http://www.scopus.com/inward/record.url?scp=85063403269&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85063403269&partnerID=8YFLogxK

U2 - 10.1016/j.ress.2019.03.043

DO - 10.1016/j.ress.2019.03.043

M3 - Article

AN - SCOPUS:85063403269

VL - 188

SP - 330

EP - 335

JO - Reliability Engineering and System Safety

JF - Reliability Engineering and System Safety

SN - 0951-8320

ER -