[MW:26398] Re: ASME Sec VIII Div.1 UCS-79 clarification

Dear All,

I would like to ssek your advice on the following:

As per project specification ,All parts which have been cold formed with an extreme fiber elongation greater than the following shall be subjected to the following heat treatment:  

Carbon and low alloy steels, 5% normalizing and tempering treatment.

 

Currently the purchased plate is a carbon steel with which is already in normalized condition.

 

Our vendor is asking not to perform tempering because as advice from the mill,they cannot guarantee the plate mechanical properties after tempering since the plate supplied in Normalized condition.Vendor will only perform Normalizing Heat Treatment for the plate.

Since i'm not expert,anybody having any experience or knowledge on this can advice me.

Thanks

On Wednesday, September 5, 2012 at 7:14:41 PM UTC+2, prem nautiyal wrote:

Hi friends   A vessel is being fabricated as per ASME Sec VIII Div.1. MOC is SA 516 Gr.70 The 2:1 ellipsoidal Dish end nominal thickness is 16mm / min thk 14mm. There is no PWHT and Impact test requirements in the vessel. I would like to know whether this 16mm thk dishend requires stress relieving or not as per UCS-79. Vendor has offered dish ends without SR. Is it acceptable? Nothing is mentioned in client specs and drawing about D/E SR.   Regards   Prem Nautiyal

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