Re: RE : ASME RF Flange Joint using Spiral Wound Gasket

From: <Christopher>
Date: Wed Nov 14 2007 - 11:35:00 EST

On Nov 14, 2007, at 1:35 AM, sviswan@technip.com wrote:

> I have had this doubt what is the need to have the 2 in the second
> part of
> the expression, when it is not there in the seating load formula
> below.

I got curious myself and did a little reading on it. As near as I can tell the factor of 2 accounts for the change in effective area with pressure applied. There's a lot of literature around on the topic and I think the gasket factors are being revised or at least revisited and there may be a more satisfactory explanation in some report somewhere. Do a Scirus search for more info.

Christopher Wright P.E. |"They couldn't hit an elephant at <a href="/group/PipingDesign/post?postID=SPego9BNeWU1mEZuhC0mDdXQW1LzKwAUPP_oQ0V53bRzCWcMQVmxIwG5nDRn9BdkaFd9eKwvLWxWcA">chrisw@skypoint.com</a> | this distance" (last words of Gen.

.......................................| John Sedgwick, Spotsylvania

1864)
<a href="http://www.skypoint.com/~chrisw/">http://www.skypoint.com/~chrisw/</a> Received on Wed Nov 14 11:35:00 2007