×
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!
  • Students Click Here

*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.

Students Click Here

Jobs

Ball valve body joints

Ball valve body joints

Ball valve body joints

(OP)
Hi,

I am new to this forum - not so new to engineering though.

Are UNF threads acceptable for bolted body joints on ball valves per ASME B16.34?  I note that some other standards state that coarse threads be used, but sometimes when running calculations per para 6.4.2 (a), just going to fine threads can prevent having to go to the next bolt size.

Thanks in advance

RE: Ball valve body joints



A rose is a rose is a rose!..

What does the standard and attachments actually say?

I suspect that if the one is especially mentioned in the standard and the other not, the latter is an exception and as such a deviation that could raise questions about validity, and you would probably not want that!

The only ones properly able to answer your question are the issuers of the standard.

 

RE: Ball valve body joints

As your citing the specific paragraph in B16.34, you know it only require that bolting comply with B1.1 or B1.13.  It does not specifically mention thread series, so you are free to use anything listed in the B1.1 or B1.13 and still claim conformance to B16.34.  However, good Engineering practice should be used.

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