>An audit was
>carried out. It was found that the couplings which were higly loaded gave
>way inspite of the deflections remaining within allowables.
Couple of things. Don't assume that allowable deflection is the same as
allowable stress or allowable load. Deflection will govern how seals
perform, but allowable loading will affect fatigue behavior in the
undercut pipe. People tend to assume that fatigue isn't a problem because
most piping codes and Section VIII-1 don't require fatigue analysis. That
doesn't mean that fatigue failures can't happen.
Christopher Wright P.E. |"They couldn't hit an elephant at chrisw@skypoint.com | this distance" (last words of Gen. ___________________________| John Sedgwick, Spotsylvania 1864)http://www.skypoint.com/~chrisw Received on Mon Oct 14 10:29:00 2002
This archive was generated by hypermail 2.1.8 : Mon Oct 27 2008 - 20:23:58 EDT