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How to properly show pipe/tube coping in a mechanical drawing

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RichardStarrbuck

Mechanical
Sep 24, 2012
11
US
Good morning all,

I am trying to figure out the best way to show a pipe coping detail in a drawing using AutoDesk Inventor.
I have a length of aluminum tubing that needs coping at both ends. Some of the coping is 90 degree some are different angles.
Is it typical to just give a diameter and an angle for the coping?
Do you put this information in a note or show it in a detail view?
Any help would be appreciated, please show examples if possible, thanks.
I am working on an example at the moment and will show my work here when done. I figured in the meantime I would ask for a little guidance on the subject.

EDIT:
Here's what I came up with for one end of the tubing. I still need to show coping at the other end but it will be cut perpendicular to the face shown here. I would really like to come up with an isometric view for this, I think it would look better and show a better representation for what we want our part to look like.
Again, any advice on this would be appreciated.

COPING_DETAIL_tuy1zz.jpg
 
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If the tubing is pressurised and/or to comply with a piping code rules you may need to think using suitable fittings at the tube connections. I am not sure if the fittings are available in any angle. Search Google for fittings' availability.

However If you are attaching tubes for general purpose what you are doing is one of the options for tube connections. If the tubes are going to be loaded axially and bend in/out of plane you need to get structural engineer approval.
 
Thank you for the reply. No, these are not to be pressurized, this is simply a structural design.
My question isn't about the tubing application, my question is simply "what is the standard for showing pipe/tube coping"?
 
Show the intersection, the location of the intersection of the work point of the two centerlines. The nominal pipe designations for both pipes. The angle of intersection.

The shop floor will cope the ends and add the "long-side" extra length needed. Most often, for standard diameters, they either have the circular saws/burning templates or can purchase the marking tools. Once the first fixture is made, they use that setup for the remainder. Weld prep gaps and offsets (different slopes for each section of the cut) will be included in their templates.) Only if it is a one-off construction do they mark and wrap it by hand.

(tubes ? "Pipe" should NOT be used for structural components because it is made to different standards for tolerance, straightness, and out-of-round than structural components)

Are you planning on this being CNC-machined?
 
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