Smart questions
Smart answers
Smart people
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Member Login




Remember Me
Forgot Password?
Join Us!

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips now!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

Join Eng-Tips
*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Donate Today!

Do you enjoy these
technical forums?
Donate Today! Click Here

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.
Jobs from Indeed

Link To This Forum!

Partner Button
Add Stickiness To Your Site By Linking To This Professionally Managed Technical Forum.
Just copy and paste the
code below into your site.

lelia (Industrial)
26 Jul 03 23:01
correct procedure when two holing or allignment of welded flange
rhodie (Industrial)
28 Jul 03 12:38
Your post might be a great question, but it isn't.

What exactly are you asking?

(I'd bet your answer depends upon the concentricty tolerance on whatever part drawing you are talking about.)
unclesyd (Materials)
3 Oct 03 22:39
A little late.
To two hole a flange means to have the two top holes of a flange straddle the vertical centerline of the flange.  This is easily accomplished using two pins that fit the bolt hole and make the pins level while still straddling the vertical center line.  This can be accomplish by experienced people with just a level lined up with the top or bottom of bolt holes.  This method is very accurate.  
If a single bolt hole straddles the vertical center line is said to one holed.  This method is hard to do in the field.
Using the two hole is mainly for allowing individual piping spools to line up when assembled. There are other reasons, like inserting a gasket by removing fewer bolts.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close