Results 1 to 9 of 9

Thread: Pipe Fitting angle precision on the fly?

  1. #1
    Forum Addict tzframpton's Avatar
    Join Date
    January 17, 2011
    Location
    Dallas, TX
    Posts
    1,963
    Current Local Time
    01:01 PM

    Pipe Fitting angle precision on the fly?

    I've been racking my brain for an hour and still can't get this one figured out. I've managed to narrow my issue down and now I'm stuck. The issue is -- in layman's terms -- I need pipe fittings to follow a small and precise angle as I'm continually routing the pipe.

    For instance: I am running 14" CHWS piping that is following a large "half moon" through an airport terminal. The pipes are spanning approximately 20'-0" before they have to redirect ever so slightly; we're talking between 2 & 3 degrees. But it's usually 2.709 degree, or 2.342 degree, etc. Now what I've been able to manage, only if I route the pipe perpendicular to the orientation of the drawing space, is place the new direction at, say 10 degrees, then place an Angle Dimension to "pull the pipe back" into the proper angle. But then when I continue routing pipe, it errors every time with any fitting, even a 45 degree fitting.

    • I've changed the angle precision of the project units all the way up.
    • I've changed the Elbow Angle Increment to 0.001 deg in Mechanical Settings.
    • I've set the Connector Tolerance to 0.000 degree.
    • I've tried Extending to the Corner, not avail.
    • I've tried using Placeholders and same thing if I'm running pipe.



    Any other ideas? I've linked a DWG file and have to "trace" over what's already been done. It's really the only routing option I have as the CHW/HW systems' routing have already been designated by the building owner.

    Thanks in advance! -Tannar

  2. #2
    Junior Member RevitGarage's Avatar
    Join Date
    December 31, 2010
    Location
    Kansas City, MO
    Posts
    8
    Current Local Time
    02:01 PM
    Have you tried opening the elbow fitting you are using to see if it can even flex to such a small angle? Most of the ones I've seen don't go below 3-5 degrees before they throw an error.

  3. #3
    Forum Addict tzframpton's Avatar
    Join Date
    January 17, 2011
    Location
    Dallas, TX
    Posts
    1,963
    Current Local Time
    01:01 PM
    Quote Originally Posted by RevitGarage View Post
    Have you tried opening the elbow fitting you are using to see if it can even flex to such a small angle? Most of the ones I've seen don't go below 3-5 degrees before they throw an error.
    That was the first thing I tried... sorry, forgot to mention. I can type 2.709 in the Angle Parameter and sure enough it flexes right to it.

  4. #4
    Moderator
    "OMG I killed Revit"
    dzatto's Avatar
    Join Date
    December 9, 2010
    Location
    Dallas, TX
    Posts
    5,230
    Current Local Time
    02:01 PM
    Can you just draw the pipes without the fittings, then use the trim command? It should put the fitting in automatically.

  5. #5
    Forum Addict tzframpton's Avatar
    Join Date
    January 17, 2011
    Location
    Dallas, TX
    Posts
    1,963
    Current Local Time
    01:01 PM
    Already tried that. It works for anything about 9 degrees and up. Definitely can't connect anything incrementally between a whole number. This is really a bummer if I can't get those going.

  6. #6
    Forum Addict tzframpton's Avatar
    Join Date
    January 17, 2011
    Location
    Dallas, TX
    Posts
    1,963
    Current Local Time
    01:01 PM
    In further investigation, I tried Round Duct. Same size, 14" diameter. This works... either on the fly or editing using the Angle Dimension to manually set it. I wonder why Pipe Fittings don't allow this?

  7. #7
    Mr. Revit OpEd
    Join Date
    December 14, 2010
    Posts
    2,736
    Current Local Time
    11:01 AM
    Fittings are using lookup tables and tiny angles are probably not "allowed" in the content. Is this happening if you use stock fittings too, the generic ones? They tend to be the most tolerant while looking nothing like what want

  8. #8
    Forum Addict tzframpton's Avatar
    Join Date
    January 17, 2011
    Location
    Dallas, TX
    Posts
    1,963
    Current Local Time
    01:01 PM
    Quote Originally Posted by Steve_Stafford View Post
    Fittings are using lookup tables and tiny angles are probably not "allowed" in the content. Is this happening if you use stock fittings too, the generic ones? They tend to be the most tolerant while looking nothing like what want
    Yes it most certainly happens with the generic ones. They are the most tolerant, and I even converted the Duct Fitting Family (which gave me the results I wanted when I used Duct Objects) to a Pipe Fitting Family (Did a Save As, changed the Category, deleted duct connectors and added pipe connectors, etc) and still wouldn't do it as a Pipe Fitting Family.

    I did find a workaround (finally). I extend the Pipe a few more feet past the point of the slight offset. I then use the SLICE tool and create a slice at the midpoint of the offset. This inserts a Coupling. Using an Angle Dimension I place the tick marks on the Detail Line I've drawn as the centerline for me to "trace" the pipe, and the centerline of the pipe. I then select the Pipe and when the angular dimension becomes editable I set it to zero. This causes the pipe to basically "miter" if you will. This works great just as long as it doesn't go above 2.5 degree +/- so it's giving me exactly the results I need. Pipe is staying connected, so I can do a Tab > Select to offset for the other three lines, etc. Furthermore, it visually represents the way the contractor will more than likely install it, which is to bevel the pipe instead of some custom fitting they fab with a torch.

    Man I'm glad I found this workaround; at the very least it gives me what I need to survive and move on. Thanks again for all who contributed!

  9.    #9
    New Member
    Join Date
    May 21, 2018
    Posts
    1
    Current Local Time
    02:01 PM
    Quote Originally Posted by tzframpton View Post
    Yes it most certainly happens with the generic ones. They are the most tolerant, and I even converted the Duct Fitting Family (which gave me the results I wanted when I used Duct Objects) to a Pipe Fitting Family (Did a Save As, changed the Category, deleted duct connectors and added pipe connectors, etc) and still wouldn't do it as a Pipe Fitting Family.

    I did find a workaround (finally). I extend the Pipe a few more feet past the point of the slight offset. I then use the SLICE tool and create a slice at the midpoint of the offset. This inserts a Coupling. Using an Angle Dimension I place the tick marks on the Detail Line I've drawn as the centerline for me to "trace" the pipe, and the centerline of the pipe. I then select the Pipe and when the angular dimension becomes editable I set it to zero. This causes the pipe to basically "miter" if you will. This works great just as long as it doesn't go above 2.5 degree +/- so it's giving me exactly the results I need. Pipe is staying connected, so I can do a Tab > Select to offset for the other three lines, etc. Furthermore, it visually represents the way the contractor will more than likely install it, which is to bevel the pipe instead of some custom fitting they fab with a torch.

    Man I'm glad I found this workaround; at the very least it gives me what I need to survive and move on. Thanks again for all who contributed!

    Trying to replicate what you did. SLICE TOOL (SPLIT ELEMENTS???) is that what you meant. Also could you post a picture of what final product looked like.

    Thanks.
    Last edited by NH3man; January 6th, 2019 at 02:00 PM.

Similar Threads

  1. Pipe Fitting Connections to each other/NO Pipe
    By se13gits in forum MEP - General
    Replies: 12
    Last Post: July 8th, 2016, 01:56 PM
  2. Revit MEP...Where is all the pipe fitting content??
    By NY_Mech_Pipe in forum MEP - Family Creation
    Replies: 2
    Last Post: December 5th, 2013, 11:14 PM
  3. Why pipe fitting show big in 2D in the plan ??!
    By ahmed_hassan in forum MEP - General
    Replies: 1
    Last Post: September 24th, 2012, 04:11 AM
  4. Pipe Fitting Junction Family
    By Roberto in forum MEP - General
    Replies: 0
    Last Post: January 24th, 2012, 02:57 PM
  5. Pipe Fitting Symbol Problem
    By bhanna in forum MEP - General
    Replies: 0
    Last Post: September 20th, 2011, 08:51 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •