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Repair Welding of Long-Term Used Ethylene Pyrolysis Radiant Tubes

[+] Author Affiliations
Keisuke Shiga, Yasuhiro Hara

Shinko Plantech Co., Ltd., Yokohama, Japan

Eiichi Yamamoto

Eishintechno, Fujisawa, Japan

Paper No. PVP2008-61904, pp. 433-438; 6 pages
doi:10.1115/PVP2008-61904
From:
  • ASME 2008 Pressure Vessels and Piping Conference
  • Volume 7: Operations, Applications and Components
  • Chicago, Illinois, USA, July 27–31, 2008
  • Conference Sponsors: Pressure Vessels and Piping
  • ISBN: 978-0-7918-4830-2 | eISBN: 0-7918-3828-5
  • Copyright © 2008 by ASME

abstract

Ethylene pyrolysis furnace radiant tubes have been used at the highest temperature in petrochemical plants. Although the tubes suffer several damages, carburization is the most important one which causes of the tube replacement. Carburization reduces the weldability and causes cracking at repair welding. This paper describes the degradation phenomena and the weldability of long-term used centrifugal casting tubes at the ethylene pyrolysis furnace.

Copyright © 2008 by ASME

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