Structural Integrity of A Standpipe Component in A Petrochemical Catalytic Cracking Unit : Part 1 - Assessment of Creep Rupture Properties  

Oleh:

Gazini, Fernando T. ; Serra, Flavio A.S. ; Marino, Luiz ; Bueno, Levi de O.

Jenis: Article from Bulletin/Magazine
Dalam koleksi: Journal of Engineering Materials and Technology vol. 122 no. 3 (2000), page 264-268.
Topik: structural; structural integrity; standpipe; petrochemical catalytic cracking; creep rupture

Ketersediaan

Perpustakaan Pusat (Semanggi) Nomor Panggil: JJ87.1 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

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Isi artikel

During a shutdown for general maintenance of a catalytic cracking unit, intergranular cracks were observerd to occur during welding of the regenerator's standpipe component manufactured from 2 1/4 Cr - 1 Mo steel. The cracking was observed to be related to intensive carbide participation 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 embrittlement effects and to carry out a general assessment of the remaining life of the component related to creep behaviour considering smooth bar creep speciments.

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