Welded Patch Repair question

Welded Patch Repair question

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Subject Author Date
Welded Patch Repair question Michael Horowitz 07-19-2008
Posted by Michael Horowitz on July 19, 2008, 11:08 am
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I'm working with 4130.
I have a piece of tubing with a series of rust holes which do not
cover an area greater than 1/2 ", so it appears a welded patch repair
would be appropriate.
Reading 43.13,, Figure 4-36, it appears the patch tube will have to be
expanded in diameter in order to fit over the injured tube (can't slip
the patch over the injured tubefrom an end).
Will there be any problem if I heat the patch so I can open open it
and slip it over the injured tubing? - Mike


Posted by Bruce A. Frank on July 19, 2008, 3:14 pm
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You should use the next diameter of tube to get easy conformation the the
shape of the tube you are repairing. But, if you have no choice but 
to use a patch from the same diameter tube, there is no problem with heating
the patch to make it plastic enough to conform to the outside contour of
the tube being repaired. If it doesn't lay down smoothly you can tack welt
the patch where it makes contact with the tube, then heat the patch with
the torch and gently tap it into place, till it lies down tightly with
the tube, with a small hammer. You can tap and tack as you go until the
patch is a tight fit, the weld it.
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you will have to use the next diameter tube as it would be virtually impossible
to expand the diameter of a tube uniformly and continuously around its
circumference.
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not
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be
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it
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Posted by Michael Horowitz on July 19, 2008, 5:58 pm
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Bruce - can't open it. Recommendation? - MIke




On Sat, 19 Jul 2008 19:14:38 GMT, "Bruce A. Frank"

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Posted by Bruce A. Frank on July 20, 2008, 5:43 am
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You should use the next diameter of tube to get easy conformation the the
shape of the tube you are repairing. But, if you have no choice but 
to use a patch from
show/hide quoted text
to make it plastic enough to conform to the outside contour of the tube
being repaired. If it
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contact with the tube, then heat the patch with the torch and gently tap
it into place, till it lies
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as you go until the patch is a tight fit, the weld it.
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you will have to use the next diameter tube as it would be virtually impossible
to expand the
show/hide quoted text


Posted by Michael Horowitz on July 20, 2008, 10:41 am
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Nevermind; got it - Mike


On Sat, 19 Jul 2008 17:58:18 -0400, Michael Horowitz

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