×
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

ASME B1.20.1 dimension h

ASME B1.20.1 dimension h

ASME B1.20.1 dimension h

(OP)
Could anyone who has access to ASME B1.20.1 please advise the value of dimension h "height of thread" for 1" and 1/2" NPS pipe.

Thanks

RE: ASME B1.20.1 dimension h

Dimension h for 1" is 0.06957" and for 1/2" is 0.05714 per Table 2 of the standard.

RE: ASME B1.20.1 dimension h


                  h [in]
threads/in   Maximun- Minumin
11.5          0.06957-0.06261
8             0.10000-0.09275
Table 1  of ASME B1.20.1

Alejandro Fernández
I+D&I
Sitelca

RE: ASME B1.20.1 dimension h

Table 2 provides the basic dimensions of taper pipe threads and indicates the following:

1/2" pipe has 14 threads/inch and h = 0.05714"
1" pipe has 11.5 threads/inch and h = 0.06957"

These are the values of h that would be used in pressure design calculations.

Table 1 provides more detail and in particular tolerance information as it lists maximum and minimum values of h. Table 1 shows the following:

14 threads/inch, h-max = 0.05714" & h-min = 0.05071"
11.5 threads/inch, h-max = 0.06957" & h-min = 0.06261"

Note: when doing a pressure design calculation we would want to use the maximum value for h as this results in the thinnest remaining wall thickness.  On that basis, the value of h we would use is the same value published in Table 2.

Pipe 2 1/2" and larger has 8 threads/inch and thus an h of 1.0000"

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