×
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

hazardous liquids and gas % Dent Ovality calculation for API 5L pipe

hazardous liquids and gas % Dent Ovality calculation for API 5L pipe

hazardous liquids and gas % Dent Ovality calculation for API 5L pipe

(OP)
Can anyone tell me the history of a commonly specified formula for determining the combination % dent ovality for natural gas and harzardous liquids pipelines (usually API 5L pipe)? The formula is this: % Dent/Ovality = [((Dmax-Dmin)-(B-A))/Dnom]*100.
I am having trouble understanding the B-A term. A is given as the depth of the dent. B is the distance from a superimposed nominal diameter distance to the bottom of the dent. Typically the Dmin is a field measured value from the top of pipe to the smallest measureable value at the deepest part of the dent. It would seem that the modification to Dmin would be to just add the dept of the dent to obtain the minor axis of the ellipse. Why does the formula subtract the B term? Is that some sort of factor of safety to make the % ovality more conservative because of the dent?



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