[TheForge] pipefitting question

Tue Nov 4 07:21:00 2003

Hey Kevin,
I have used the "Good 'ol" layout wrap they sell at the weld supply houses.
It's kind of like a framer's square for pipefitters. I have one in the shop, or you can get one at Weiler/VNG/Ferguson etc.

Ray
Cincinnati

> 
> From: "Kevin Donahoe" <[email protected]>
> Date: 2003/11/03 Mon PM 08:22:24 EST
> To: "theforge" <[email protected]>
> Subject: [TheForge] pipefitting question
> 
> All,
> 
> I know there's got to be some pipefitting genius amongst this throng...  I
> thought I'd found my answers at http://www.tpub.com/steelworker2/38.htm
> instead I have more questions. Hopefully more intelligent than they would
> have been a week ago.
> 
> I'm building a gantry crane for the shop using 5" pipe (as that's what they
> had at the scrap yard at $0.15/lb.  It's overkill but cheap!)  The question
> is; I want to fit the pipe at a 30 deg angle to a piece of the same
> diameter.  The OD= 5.5", ID= 5.0", for what it's worth.  There will be two
> legs welded at 30* to a vertical support pipe.
> 
> I've read the article noted above, and the pages leading up to it a dozen or
> so times in the last week and think I get the jist of it... damn if it still
> doesnt' add up.
> 
> 1; as I want to attach the branch pipe to the header pipe (as far as I can
> tell) without cutting a hole in the (vertical) header pipe, will this work?
> or does it only apply to cutting a hole in the header pipe, too? since 3/4
> of the article is about how to cut the hole in the header, and only 1/4
> addresses cutting the branch pipe to fit?
> 
> 2; for a 30* angle the cutback is only ~.75" to the top line and ~1.5" to
> the bottom line from the side quarter lines.  That doesn't come anywhere
> near dimensions of a right triangle with a 5.5" base and 30* opposite angle
> = 9.5" side adjacent... What the heck am I missing here?
> 
> 3; Is this one of those conceptual things that's not even ruffling my hair?
> Jeesh! OR, it just occurred to me, am I on the completely wrong section?
> pleaseandthankyou!
> 
> Even though the points I & G in the illustration are missing from the header
> pipe, it doesn't seem to detract from the directions for the branch pipe.
> 
> Kevin Donahoe
> Flying Pig Forge
> Morrow, OH
> [email protected]
> 
> 
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