×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

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.

Students Click Here

API 6X 2nd ed. Section 5.3.3

API 6X 2nd ed. Section 5.3.3

API 6X 2nd ed. Section 5.3.3

(OP)
the section states

5.3.3 Secondary Stress
The primary plus secondary stress variation, delta Q, for any sequence of test or operating conditions, shall not
exceed 3SmĀ·

Is this more than the Pl+Pb for the secondary stress? This seems to say that is Pm + Secondary stress, so... PM + Pl + Pb. No where in the code to they properly define this.

This is for a valve design where max operating pressure would be 5000 psi. Would this just be the Pl+Pb in the area of secondary stress for a case of 5000 psi?

Any insight as to what this is would be much appreciated thank you.

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! Already a Member? Login



News


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