The failure analysis of a pipeline bend made of 16Mo3 steel

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F25870807%3A_____%2F23%3AN0000020" target="_blank" >RIV/25870807:_____/23:N0000020 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.confer.cz/metal/2023" target="_blank" >https://www.confer.cz/metal/2023</a>

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

The failure analysis of a pipeline bend made of 16Mo3 steel

Popis výsledku v původním jazyce

Steel 16Mo3 (P1 according to ASTM) represents still a popular material used in waterwalls, pipelines and other components of steam power plant boilers operating at temperature up to 530 °C. However, the absence of other alloying elements (especially chromium) reduces the long-term structural stability of this steel especially at temperatures higher than 450 °C. The paper describes the results of an analysis of a pipeline elbow that burst after nearly 200 000 hours of operation. The complex analysis of material properties and microstructure revealed the extensive graphitization, although mechanical strength, plasticity as well as notch toughness were affected only negligibly. Particles of graphite were randomly distributed in the microstructure and heavy cavitation damage was detected namely close to the fracture surface. Analysis of operation data then showed that the temperature in this part of the steam pipeline was higher due to the changes in the fuel mix and exceeded the maximum 470 °C recommended for the steel 16Mo3 just in order to avoid the danger of massive graphitization.

Název v anglickém jazyce

The failure analysis of a pipeline bend made of 16Mo3 steel

Popis výsledku anglicky

Steel 16Mo3 (P1 according to ASTM) represents still a popular material used in waterwalls, pipelines and other components of steam power plant boilers operating at temperature up to 530 °C. However, the absence of other alloying elements (especially chromium) reduces the long-term structural stability of this steel especially at temperatures higher than 450 °C. The paper describes the results of an analysis of a pipeline elbow that burst after nearly 200 000 hours of operation. The complex analysis of material properties and microstructure revealed the extensive graphitization, although mechanical strength, plasticity as well as notch toughness were affected only negligibly. Particles of graphite were randomly distributed in the microstructure and heavy cavitation damage was detected namely close to the fracture surface. Analysis of operation data then showed that the temperature in this part of the steam pipeline was higher due to the changes in the fuel mix and exceeded the maximum 470 °C recommended for the steel 16Mo3 just in order to avoid the danger of massive graphitization.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název statě ve sborníku

CONFERENCE PROCEEDINGS – METAL 2023

ISBN

978-80-88365-12-9

ISSN

2694-9296

e-ISSN

—

Počet stran výsledku

7

Strana od-do

352-358

Název nakladatele

Tanger s.r.o.

Místo vydání

Ostrava

Místo konání akce

Brno

Datum konání akce

17. 5. 2023

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

—