Pipe fitting - Elbow doesn't do 90° with diameter 250mm

[jeroen_vanmassenhove]

Hi everyone,

I found out this strange behaviour of a pipe fitting we use, generic from the NLRS.

The fitting refuses to work only in 1 specific case:

Pipe of 250mm diameter and a 90° bend when used in a project.

I've tested by starting a new project from the revit architectural template and loading just the pipe fitting as an elbow to the standard pipes provided in that template, so I'm sure it hasn't got anything to do with the template we start from.

In a project:

• With a 250mm diameter pipe:
  • 45° bends etc work fine, just the 90° doesn't. Just placing a pipe fitting without the pipe also fails with that specific 250mm-90° setting (248mm-90° DOES work).

Error message:

An error occurred in family "NLRS_50_PIF_UN_bocht - pe_gen_rsf" and was automatically resolved, but may require review by the family creator.
Error Information:
"Can't create sweep"
Error Resolution: Delete Element(s)

• With any other diameter pipe:
  • everything works great.

In the family editor: 

• 250mm with a 90° turn just will not create sweep, 91° with 250mm does work or 90° with 248mm does also work.

Can anyone take a look at this?

I can't find out why, but a bend is one of the easiest pipe fittings, right?

(Some parameters are in dutch)

Thanks in advance

[piotr.bocian · Accepted solution]

There was some problem with constrains - see image. I repair this by removing radial dimension on red and adding dimension on blue from end of reference line to model line, see image.

I did changes and saved it in Revit 2017

Bez tytułu.pngBez tytułu1.png

[jeroen_vanmassenhove]

Thank you for your time and effort to take a look and fix te problem!

Strange, wouldn't think of it that the radial dimension might be the wrong pick for the constraint.

The weirdest part about it in my opinion is that it only has problems with that 250mm - 90° bend and not for any other configuration (that I've come to find out at this moment).

Thanks!