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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
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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.
show/hide quoted text
<p>If you want to make a slip over repair using a whole piece of tube,
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.
show/hide quoted text
<p>Michael Horowitz wrote:
<blockquote TYPE=CITE>I'm working with 4130.
<br>I have a piece of tubing with a series of rust holes which do
not
show/hide quoted text
<br>cover an area greater than 1/2 ", so it appears a welded patch repair
<br>would be appropriate.
<br>Reading 43.13,, Figure 4-36, it appears the patch tube will have to
be
show/hide quoted text
<br>expanded in diameter in order to fit over the injured tube (can't slip
<br>the patch over the injured tubefrom an end).
<br>Will there be any problem if I heat the patch so I can open open
it
show/hide quoted text
</html>
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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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>
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Posted by Bruce A. Frank on July 20, 2008, 5:43 am
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<!doctype html public "-//w3c//dtd html 4.0 transitional//en">
<html>
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
<br>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
show/hide quoted text
<br>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
show/hide quoted text
<br>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.
show/hide quoted text
<p>If you want to make a slip over repair using a whole piece of tube,
you will have to use the next diameter tube as it would be virtually impossible
to expand the
show/hide quoted text
<br>diameter of a tube uniformly and continuously around its circumference.
<br>
<p>Michael Horowitz wrote:
<blockquote TYPE=CITE>Bruce - can't open it. Recommendation? - MIke
<p>On Sat, 19 Jul 2008 19:14:38 GMT, "Bruce A. Frank"
<p>></blockquote>
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Posted by Michael Horowitz on July 20, 2008, 10:41 am
Please log in for more thread options Nevermind; got it - Mike
On Sat, 19 Jul 2008 17:58:18 -0400, Michael Horowitz
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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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