JIC flared tube and fittings - tube and pipe

[peter.roman]

Hi,

I'm trying to set up some JIC fittings for use with tube and pipe and also a tube style that gives the pre-flare cut length.

(The existing tube style in content centre and parker triple-lok fittings cut the tube at the tip of the male and combine the nipple, nuts and sleeves into a single part.)

I have set up a nut and sleeve (1 part), and a nipple.

Note that the connection points in the nut are "behind" each other so that the tube correctly sticks into the nipple.

The connection arrows should be in the correct direction (they overlap in the nut).

The tube connection is set as flared and the nipple connection as threaded.

I can assemble the fittings onto the end of the tube correctly, or when loose:

but not when I try to add a node in the tube

The only way I can even get the fittings in is to add the nipple, then place - insert the nuts on but they connect the wrong way to the tube and nipple.

When first placed, the work points connect correctly flared to flared, threaded to threaded but the nut points the wrong way.

I have to flip the orientation (space bar) to visually get it pointing the right way but the the flared and threaded connections swap as well.

Can anyone help out with this?

I've attached the files including both authored and published versions of the fittings.

[peter.roman]

Any suggestions?

[CGBenner]

@peter.roman 

Hello Peter.  I'm afraid I don't have any great advice on this.  I think the reason these were originally authored as a single piece was because this kind of complex arrangement just doesn't work well in T&P.  I've done a little bit of work with similar arrangements, like Tri Clamp sanitary connections, and run into some situations like this where I ended up having to manually add and constrain some of the fittings, just because T&P was getting confused with having so many parts in one small area.  I hate to say this, but in such a complex arrangement, a workaround might be the best you can hope for.  It sounds like you've been able to make it work with a little bit of manually bumping the orientation with the space bar.  If this was me I might consider playing with it until you find a workflow that gets the results you want, and then document it so you can train others.  A lot of T&P is trial and error, because the original designers just could not anticipate every complex scenario that we designers come up with.  LOL  Good luck!

[peter.roman · Accepted solution]

I've played with it a bit and I think it's to do with the work points being out of order on the route line.

My tube point is on the pre-flare cut point.

My original male fitting point was on the tip (red line) which is before the cut, making the points out of order.

I changed it to a (size-scaled) offset from the tip to make sure the work points are always in the correct order on the route line.

This seems to fix the issue of the ends getting mixed up (even though in both cases the connection directions were set up correctly)

[CGBenner]

@peter.roman 

Great!  Thanks for sharing what you've done so far!  I marked that as a solution, even though you may come up with more, so that others can find it in the future.  👏