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[MW:2247] Re: Y COFFICIENT IN PIPING

By Materials & Welding
dear Shank
your answer is true.but because Y in equation is placed on denominator, therefore with increasing ,thckness decreases.is my analysis true?


From: Shank Vagal <nach_sam@yahoo.com>
To: materials-welding@googlegroups.com
Sent: Wednesday, May 27, 2009 2:45:29 PM
Subject: [MW:2246] Re: Y COFFICIENT IN PIPING

Dear Ali,
You see, without going in to much theory, I surmised from what you gave in the parenthesis as follows:
If the strength goes down with increase in temp , you will need more thickness, naturally, as compared to when you operate at low temp. I hope this clears it.
Rgds,
Shank

--- On Wed, 27/5/09, Ali Asghari <asghariali@rocketmail.com> wrote:

From: Ali Asghari <asghariali@rocketmail.com>
Subject: [MW:2244] Re: Y COFFICIENT IN PIPING
To: materials-welding@googlegroups.com
Date: Wednesday, 27 May, 2009, 3:10 PM

dear Shank Vagal
can you explain more?because my point of view from writting parenthesis is the required minimum thickness (with assuming constant work presure)decreases.
rjd

From: Shank Vagal <nach_sam@yahoo.com>
To: materials-welding@googlegroups.com
Sent: Wednesday, May 27, 2009 11:18:34 AM
Subject: [MW:2241] Re: Y COFFICIENT IN PIPING

The answer you have given in the parenthesis itself..............

--- On Wed, 27/5/09, Ali Asghari <asghariali@rocketmail.com> wrote:

From: Ali Asghari <asghariali@rocketmail.com>
Subject: [MW:2240] Y COFFICIENT IN PIPING
To: materials-welding@googlegroups..com
Date: Wednesday, 27 May, 2009, 10:49 AM

CAN ANY BODY EXPLAIN,WHY Y (IN B31.3 FOR CALCULATING THICKNESS) INCREASES WITH INCREASING TEMPRATURE?
(ACCORDING TO ALLOWABLE STRESS DECREASES WITH INCREASING TEMP) 
 
REGARD ADVANCE




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