Structural Integrity of a Standpipe Component in a Petrochemical Catalytic Cracking Unit: Part 2—Assessment of Embrittlement Effects-Reference-Cited by-同舟云学术

Structural Integrity of a Standpipe Component in a Petrochemical Catalytic Cracking Unit: Part 2—Assessment of Embrittlement Effects

Published:2000-03-07 Issue:3 Volume:122 Page:269-272
ISSN:0094-4289
Container-title:Journal of Engineering Materials and Technology
language:en
Short-container-title:

Author:

de O. Bueno Levi¹,Marino Luiz¹,Serra Flavio A. S.²,Gazini Fernando T.²

Affiliation:

1. Department of Materials Engineering, Universidade Federal Sao Carlos, Rodovia W. Luiz, km.235, 13565-905 Sao Carlos (SP), Brazil

2. PETROBRAS/REPLAN, Rodovia SP 332, km 132, 13.100 Paulinia (SP), Brazil

Abstract

During a shutdown for general maintenance of a catalytic cracking unit, intergranular cracks were observed to occur during welding of the regenerator’s standpipe component manufactured from 2 1/4 Cr-1Mo steel. The cracking was observed to be related to intensive carbide precipitation in grain boundaries. To overcome the problem it was decided to heat-treat the relevant section of the component to dissolve these carbides and make possible its welding to a new virgin section of the tube. Samples of the material in its various conditions (virgin, ex-service, heat-treated, and welded) were taken to check the efficiency of the thermal treatment in reducing the embattlement effects and to carry out a general assessment of the remaining life of the component related to creep behavior considering notched bar creep specimens. [S0094-4289(00)00503-X]

Publisher

ASME International

Subject

Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science

Link

http://asmedigitalcollection.asme.org/materialstechnology/article-pdf/122/3/269/5798867/269_1.pdf

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