INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • 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!

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

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Jobs

How to decide the face to face dimension of a NPT/SW Type Coupling

How to decide the face to face dimension of a NPT/SW Type Coupling

(OP)
In our project, a coulping with NPT/SW connection is used.
In B16.11, dimension for threaded or SW connection on both ends is defined. However, for the dimension of NPT/SW type coupling, how to define the face to face dimension?

Thanks.

RE: How to decide the face to face dimension of a NPT/SW Type Coupling

check mfr's data bonny forge to start
it should be the same as threaded coupling

RE: How to decide the face to face dimension of a NPT/SW Type Coupling

(OP)
Thanks for your reply.
Can you be more specific about mfr's data bonny forge?
I looked up the homepage of Bonny forge and did not find relevant information.

RE: How to decide the face to face dimension of a NPT/SW Type Coupling

Go here and look at all of the dimensions for Couplings.
http://www.pennusa.com/pennpage/directory/forgecat/forgcatl.htm
Look at the same size across the board:
a). all the Threaded Couplings have the same end-to-end dimension for a given size
and
b). all the Socket-Weld Couplings all have the same but different end-to-end dimension for the same given size

c). this suggests to me that the manufacturer makes one length "Blank" for Threaded Couplings and a different length "Blank" for Socket-Weld Couplings
  
d). what you want is a mix, Threaded on one end and Socket-Weld on the other end.

d). Contact your supplier and ask if a Threaded by Socket-Weld Coupling is available.  If it is not made then you need to find a different method to change construction.

e). The different method might be to make the transition from Threaded to Socket-Weld is via a Threaded-one-end (TOE)Nipple.

RE: How to decide the face to face dimension of a NPT/SW Type Coupling

(OP)
Thank you very much for you reply.
Actually, the reason for this one is that we are trying to establish a standard database for piping components. I wanted that for vendors, what is the common practice for this kind of situation.

Thanks anyway.

RE: How to decide the face to face dimension of a NPT/SW Type Coupling

I repeat,
Make the transition from Threaded to Socket-Weld via a Threaded-one-end(TOE) Nipple.  

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

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!


Resources


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