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re: "... hen brand new do the mild steel down pipes ever show any sign
of flex?"
If you mean does the flexible section, well, flex? Yes, they do; maybe
an inch or two of deflection at the end.
Bob
On 10/24/2019 6:52 AM, Neil McDonald wrote:
> An exciting subject indeed!
>
> I am about to fit an unused mild steel down pipe that I have had on
> the shelf for maybe ten years. No sign of rust but I am away from home
> right now so can not test it for flex. I might zap it with WD40 before
> fitting - canâ??t hurt.
>
> The question is - when brand new do the mild steel down pipes ever
> show any sign of flex?
>
> Neil
> BN6
>
> On Thu, Oct 24, 2019 at 2:42 PM Perry via Healeys
>
> Listers
>
> As a follow up to my post on 10/18 on this exciting subject, I
> decided to do an experiment with a couple downpipes I had in the
> parts bin. Both pipes are new old stock and have never been on a
> car. One is stainless and the other mild steel. Both have been
> laying on a shelf in the garage for at least 9 years.
>
> The test was to measure how much deflection was noted in the flex
> portion of the downpipe when the tip (where it enters the muffler)
> is loaded with a weight. The upper portion of the pipe was firmly
> held by the bench vice.
>
> Should have started with something less then 10 pounds but the
> stainless moved considerably under that weight. The mild steel
> did not budge.
>
> At 47 pounds I heard a creaky noise but no movement on the mild
> steel. I then applied an unspecified force with my hand to the 47
> pounds and no movement.
>
> My conclusion is that the mild steel flex pipe, once it takes a
> set, ie, Gets Rusty, does not flex. It is the weak link that will
> fail but it might as well be a piece of regular pipe.
>
> Perry
>
> Sent from Mail <https://go.microsoft.com/fwlink/?LinkId=550986>
> for Windows 10
>
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re: "... hen brand new do the mild steel down pipes ever show any
sign of flex?"<br>
<br>
If you mean does the flexible section, well, flex? Yes, they do;
maybe an inch or two of deflection at the end.<br>
<br>
Bob<br>
<br>
<div class="moz-cite-prefix">On 10/24/2019 6:52 AM, Neil McDonald
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAM8RsFcAu-9EGm0CEKDwxyEhHW31JoaKqKvjb3_pOd1qim2ojw@mail.gmail.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div>
<div dir="auto">An exciting subject indeed!</div>
</div>
<div dir="auto"><br>
</div>
<div dir="auto">I am about to fit an unused mild steel down pipe
that I have had on the shelf for maybe ten years. No sign of
rust but I am away from home right now so can not test it for
flex. I might zap it with WD40 before fitting - canâ??t hurt. </div>
<div dir="auto"><br>
</div>
<div dir="auto">The question is - when brand new do the mild steel
down pipes ever show any sign of flex?</div>
<div dir="auto"><br>
</div>
<div dir="auto">Neil</div>
<div dir="auto">BN6</div>
<div><br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Thu, Oct 24, 2019 at 2:42
PM Perry via Healeys <<a
href="mailto:healeys@autox.team.net";
moz-do-not-send="true">healeys@autox.team.net</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div link="blue" vlink="#954F72" lang="EN-US">
<div class="m_-4121697948113192191WordSection1">
<p class="MsoNormal">Listers</p>
<p class="MsoNormal">As a follow up to my post on 10/18
on this exciting subject, I decided to do an
experiment with a couple downpipes I had in the parts
bin. Both pipes are new old stock and have never been
on a car. One is stainless and the other mild steel.
Both have been laying on a shelf in the garage for at
least 9 years. </p>
<p class="MsoNormal">The test was to measure how much
deflection was noted in the flex portion of the
downpipe when the tip (where it enters the muffler) is
loaded with a weight. The upper portion of the pipe
was firmly held by the bench vice. </p>
<p class="MsoNormal">Should have started with something
less then 10 pounds but the stainless moved
considerably under that weight. The mild steel did
not budge.</p>
<p class="MsoNormal">At 47 pounds I heard a creaky noise
but no movement on the mild steel. I then applied an
unspecified force with my hand to the 47 pounds and no
movement. </p>
<p class="MsoNormal">My conclusion is that the mild
steel flex pipe, once it takes a set, ie, Gets Rusty,
does not flex. It is the weak link that will fail but
it might as well be a piece of regular pipe.</p>
<p class="MsoNormal">Perry</p>
<p class="MsoNormal">Â </p>
<p class="MsoNormal">Sent from <a
href="https://go.microsoft.com/fwlink/?LinkId=550986";
target="_blank" moz-do-not-send="true">Mail</a> for
Windows 10</p>
<p class="MsoNormal">Â </p>
</div>
</div>
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