NDLI: Thermal Shock: Early Stage Damage Detection and Monitoring or .....Failure Analysis

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Ezra, Dan Yagen, James
Copyright Year	2011
Abstract	Cold Reheat Piping in power plants has received little attention for many years. Carbon Steel piping that handles steam at 500 F to 700 F has only had problems when not properly supported or water hammered on start up. Most recorded failures have been mechanical fatigue at a girth weld. Excessive attemperation in both coal fired plants and combined cycle ones, has become a routine practice. Consequently the number of failures (catastrophic or non-catastrophic) in Cold Reheat Piping have occurred in recent years. Most of these recent failures can be traced back to water hammer or a thermal shock due to changes in the operation of attemperator sprays. This paper shows how a Cold Reheat Piping system, that was included in a nondestructive test program, failed in a short period of time due to thermal fatigue, from a change in spray operation.
Sponsorship	Power Division
Starting Page	25
Ending Page	33
Page Count	9
File Format	PDF
ISBN	9780791844601
DOI	10.1115/POWER2011-55164
Volume Number	ASME 2011 Power Conference, Volume 2
Conference Proceedings	ASME 2011 Power Conference collocated with JSME ICOPE 2011
Language	English
Publisher Date	2011-07-12
Publisher Place	Denver, Colorado, USA
Access Restriction	Subscribed
Subject Keyword	Water Sprays Fatigue Combined cycles Piping systems Nondestructive evaluation Water hammer Failure analysis Thermal shock Coal Steam Power stations Carbon steel Damage Pipes Failure
Content Type	Text
Resource Type	Article

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