----- Original Message -----
Sent: Thursday, October 12, 2006 1:04
AM
Subject: [FlyRotary] Re: Exhaust
Update
David, The method is to put the pipe thru the flange. I've attached
two jpegs to show examples
Bill Jepson
-----Original Message-----
From: dcarter11@sbcglobal.net
To: flyrotary@lancaironline.net
Sent:
Tue, 10 Oct 2006 9:42 PM
Subject: [FlyRotary] Re: Exhaust Update
How does a welder weld the "inside" of an exhaust
pipe joint? Seems like a long reach with tip of a long welding rod and a
woefully small angle for touching the seam to electricaly weld
it.
David
----- Original Message -----
Sent: Tuesday, October 10, 2006 8:41
AM
Subject: [FlyRotary] Re: Exhaust
Update
>Just a heads up - it
looks like your new "header flange to pipe" (picture 5) was welded on
the >outside. I think that
'acceptable practices' state that there should only be a tack weld on the
>outside and the
actual structural weld should be on the inside. What does everyone
else say? In >any event be sure to keep an eye on
the welds.
>
>Ken Powell
It depends on the
configuration. Generally, if are side loads due to thermal stress,
vibration, whatever; it is better to have a snug fit of tube through the
flange and weld on the inside. This reduces the stress on the weld and
can increase the reliability of the weld. The key in either case is
the quality of the weld and the heat treatment after the
weld.
At least that’s
what I recall from my days as a practicing engineer. Mine are welded
on both sides. I’d prefer they were welded inside
only.
Al
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