LIFE ASSESSMENT OF HIGH PRESSURE STEAM PIPING BEND WORKING UNDER CONDITIONS OF CREEP DAMAGE

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F15%3A00301856" target="_blank" >RIV/68407700:21220/15:00301856 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

LIFE ASSESSMENT OF HIGH PRESSURE STEAM PIPING BEND WORKING UNDER CONDITIONS OF CREEP DAMAGE

Popis výsledku v původním jazyce

For many years, low alloy CrMo(V) creepresistant steels are applied for parts in the construction of energy and chemical structural units working under creep conditions (temperature about 550 degrees C and pressure about 15 MPa). These steels most often include creepresistant steel 13CrMo44 (CSN 15 121), 14MoV63 (CSN 15 128), 10CrMo910 (CSN 15 128). The main problem of steam pipelines made of these creepresistant steels is a residual lifetime, because these parts are at presence in most Czech power plants at the end of their designed lifetime (2,5 . 10(5) hours). This article deals with a lifetime assessment of one steam piping bend made of CSN steel 15 128 (14MoV63) which was operated in conditions of creep damage in Czech fossil fuel power plant until its creep deformation obtained a limit of 1 percent. The overall condition of the bend was assessed using replica and cross section metallography including electron microscopy and by evaluation of mechanical properties in asreceived state and after additional laboratory ageing at 600 degrees C for up to 5 000 hours in air conditions. As the final result, the residual lifetime by using mathematical approaches and standards was estimated.

Název v anglickém jazyce

LIFE ASSESSMENT OF HIGH PRESSURE STEAM PIPING BEND WORKING UNDER CONDITIONS OF CREEP DAMAGE

Popis výsledku anglicky

For many years, low alloy CrMo(V) creepresistant steels are applied for parts in the construction of energy and chemical structural units working under creep conditions (temperature about 550 degrees C and pressure about 15 MPa). These steels most often include creepresistant steel 13CrMo44 (CSN 15 121), 14MoV63 (CSN 15 128), 10CrMo910 (CSN 15 128). The main problem of steam pipelines made of these creepresistant steels is a residual lifetime, because these parts are at presence in most Czech power plants at the end of their designed lifetime (2,5 . 10(5) hours). This article deals with a lifetime assessment of one steam piping bend made of CSN steel 15 128 (14MoV63) which was operated in conditions of creep damage in Czech fossil fuel power plant until its creep deformation obtained a limit of 1 percent. The overall condition of the bend was assessed using replica and cross section metallography including electron microscopy and by evaluation of mechanical properties in asreceived state and after additional laboratory ageing at 600 degrees C for up to 5 000 hours in air conditions. As the final result, the residual lifetime by using mathematical approaches and standards was estimated.

Druh

D - Stať ve sborníku

CEP obor

JG - Hutnictví, kovové materiály

OECD FORD obor

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Projekt

<a href="/cs/project/LO1207" target="_blank" >LO1207: Podpora udržitelnosti Inovačního centra diagnostiky a aplikace materiálů na ČVUT-FS v Praze</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2015

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

METAL 2015 - 24th International Conference on Metallurgy and Materials

ISBN

978-80-87294-62-8

ISSN

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e-ISSN

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Počet stran výsledku

7

Strana od-do

546-552

Název nakladatele

Tanger

Místo vydání

Ostrava

Místo konání akce

Brno

Datum konání akce

3. 6. 2015

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000374706100085