Coping steel pipe prior to welding.

McMXi

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I have a big welding project this spring in the form of a steel pipe "pole barn". I have lots of pipe on hand for the trusses and have two ways to go. One is to cope the pipes to fit up at the various angles required, and the other is to notch and insert plates at the joints. The Moline airport has some very nice examples of this approach (see below).

If I go with coped joints I'm thinking of using SolidWorks to model pipe that has an I.D. equivalent to the O.D. of the pipe that I'll be using. I can cut the pipe at the appropriate angle, split the pipe in the model, and then 3D print the two halves of the pipe and use it as a template to mark the pipe in preparation for cutting with plasma.

Is there a better approach to figuring out and cutting coped joints in pipe? When I worked as a welder many years ago we'd cut out a pipe until the joint looked good, wrap a piece of paper around the cut, mark the cut and then reuse the paper to mark the rest of the pipe that we needed. It was good enough at the time but there might be a better way now.

pipe&plate_01.jpg


pipe&plate_02.jpg
 

North Idaho Wolfman

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I really like the way they did those trusses as they are really strong and quick to build.
Makes alignement super easy.

I'll have to dig a little deeper in my search history as I had one picked out for a drill press too.





I have Annular cutters for my drill press.
Talk about drilling sweet holes fast!


other option:
 
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McMXi

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That Centurialinc coping tool looks like it could work well for me. The only downside is the need to reset it over and over. Hmmm ... decisions, decisions.

 

McMXi

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I edited my first post, and added a little.
I have a Hougen mag drill with two sets of those annular cutters and yep, they're the bees knees. I'd rather use plasma to cut the steel pipe given how long and heavy the sections are. I'm going to look at how many different coped joints I'll need to make, and will decide if one of those pin type coping tools is the way to go.
 

North Idaho Wolfman

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Aww yes plasma, that would be much quicker.
If you could make a jig to follow that would make cuts quick and accurately.

Hey a jig like Lil foot put up might work perfectly.
 
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McMXi

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Lil Foot

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My fence contractor said when he builds the gates (at his home shop) he cuts them with a plasma cutter, (no clean up with grinder needed) but at the job site he marks them with welding chalk, then torches them.
Our local ACE carries that clamshell marking jig.