On Wed, 07 Jun 2006 16:00:05 -0400, Michael Horowitz
wrote:

Folks - 43-13-1B says an inner sleeve can be up to 1/16th inch smaller
in diameter than the ID of the original tubing.

When you slip the inner tube inside the original tube 1/16th turns
into a lot of slop.

Do you make any attempt to center the inner tube in the original
tubing? If so, how? - Mike


Simplest method is to slit the tube and expand it to fit snuggly, or
better slit a tube that is too large to fit (like a piece of the tube
being sleeved) and squeeze it down to fit. Then drill both ends being
joined in 2 or 3 places, evenly around the tube, and rosette weld as
well as welding the butt, which can also be scarfed to make a stronger
weld.

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