Re: [MW:3761] Material selection

Dear Sachin,

I think there might be some error in drawing or data sheet. Please write to client to clarify on this and seek conformance for 304L caldding. 

2009/11/28 sachin sankhe <sachin.sankhe@rediffmail.com>

Dear Freinds,
I have query on below subject

We have got main colum section of FCC unit wherein base metal is LAS cladded with SS304L.This requirement in specified by UOP Process Licensor
However design temp of Main column is around 55o deg.C
Under this circumstances,I feel SS304L is not suitable at this temp since it will result in formation of chromium carbide at grain boundries.
I feel UOP shall have specifed SS347.
Kindly share your knowledeg

Regards
Sachin

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C. K. Purohit
Eng-Tech Weld1
Sr Welding Inspector

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