Wednesday, April 12, 2017

[MW:26391] Re: Requirement of Solution Annealing for SS DIshed head after forming

Hi All,

I have read all the valuable discussion happened here, I come to know about few point what I was not aware thanks all of you.

I have a torispherical dish head with fiber elongation of 6%, Design temperature =200°C, MOC = SA-240 Gr. 316L . As per UHA -44 weather Solution annealing is required.

The point behind asking this question is if the design temperature is below 580°C (as given in Table UHA-44) then do I need to solution annealing.

Second thing As per clause UHA-44 (a) 1 (-a) what is finishing -forming temperature. I believe it is not design temperature.


 
On Tuesday, 13 September 2011 15:48:03 UTC+5:30, asad azmi wrote:
Dear All,
 
Greetings.
 
SS Vessel is being fabricated as per construction code - ASME SEC VIII DIV 1
 
SERVICE : SOUR Service
 
Material of Construction  for Dished Head - SA 240 316L, 20 mm Thickness.
 
I  believe stresses will be  induced in the material  during forming and as a result , Sulfide Stress Cracking (SSC) failure may occur during operation.
 
Whether Solution Annealing of SS Dished Head is required after forming?
 
Please give reference of any International Standard.
 
Thanks & Regards
 
Asad Azmi

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