Re: SIF

From: <Christopher>
Date: Thu Sep 22 2005 - 11:10:00 EDT

On Sep 22, 2005, at 2:00 AM, Sujan.Maji@ril.com wrote:

> Here we are using some threaded tees. So the SIF must be different from
> welded fittings.

I think the SIF applies to the point were the branch meets the run, not the threaded area. The threaded joint is double thick since the pipe and thickness overlap. There is also some interference when the joint is made up and tightened, so the stress at the threads isn't subject to the same fatigue loading as the remainder of the fitting. Christopher Wright P.E. |"They couldn't hit an elephant at <a href="/group/PipingDesign/post?postID=vTlT1t2q6VgamONSgjb1fqkNGFJ3tfchfJ0XEMary7YzHZ0Zkwpkoo_L3R-KLBfIiF4a1LHMa3y0Ag8">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 Thu Sep 22 11:10:00 2005