On Thu, 20 Sep 2007 21:45:24 -0400, "J.Kahn"
wrote:


I believe that you have to effectively have a full lap joint weld
between each outer tube and inner tube, AND the joint must be a
truncated cut and not just straight across in order to have sufficient
weld cross section since it's essential that the weld zone be much
stronger than the virgin metal up the tube.

John


John - please see http://members.cox.net/mhorowit/cluster/lapjoint/
I took your suggestion and treated each side of the "outer sleeve" and
the "inner sleeve" as the components of a lap joint; hence two beads.
That's what you were talking about instead of my trying to integrate
the outer and inner sleeves in one weld, correct? - Mike

PS - I don't think taking a shortcut by simply cutting a partial
slice in a larger diameter tube would make a difference in the
exercise;