Naslov
CREEP ANALYSIS OF HOT REHEAT LIVE STEAM PIPING SYSTEM

Autori
Lorković, Nenad

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings of 15th International Research/Expert Conference ”Trends in the Development of Machinery and Associated Technology”, TMT 2011 / Sabahudin, Ekinović ; Emir, Tacer ; Joan Vivancos, Calvet - Zenica : Univerzitet u Zenici, 2011, 829-830

Skup
15th International Research/Expert Conference ”Trends in the Development of Machinery and Associated Technology”, TMT 2011

Mjesto i datum
Prag, Češka Republika, 12.09.2011. - 18.09.2011

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
pipes, crack , creep, stresses

Sažetak
Site inspections of Hot Reheat Piping system have indentifed cracking at a number locations at butt welds between pipe runs and elbows.Furthermore, it was discovered that pipe runs are instaled with wall thickness of SCH60(ANSI/ASME code[3]), and elbows with wall thickness of SCH30 what is not according to design documentation.This wall thickness discrepancy creates a stress enhancement at the connections between elbows and piping runs.Also, because the elbows are more flexible, there could be a propensity for a creep strains to be concentrated in the elbows as the piping system stresses will be relaxed at these lower strength elbows rather than being distributed throughout the main piping runs.So, a detailed finite element analysis, including elastic and creep analysis, is performed to determine if the secondary stresses during relaxation, or if the stress enhacement of the wall thickness discrepancy, play significant roles in the cracking detected in the piping system.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo

POVEZANOST RADA