×
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

API 620 Verifying for Maximun Allowable Working Pressure

API 620 Verifying for Maximun Allowable Working Pressure

API 620 Verifying for Maximun Allowable Working Pressure

(OP)
Greetings,

I'm verifying some storage tank MAWP's of which some are 650's and some are 620's. Now the 650 were basically straight forward because they have an explicit formula for MAWP but the 620's don't, that I know of. Does anyone know a way to solve this problem? Remember I already have the tanks, I want to verify if the pressures that they are designed to work to are correct.

Thanks,
Joe

RE: API 620 Verifying for Maximun Allowable Working Pressure

You can solve the problem by applying the design provisions of API-620.  There's not a good shortcut.  If you have the tanks but don't have design drawings, it may be difficult to verify.

API-650 has formulas for maximum pressure, but they have also changed up the way pressure and seismic and wind interact, and have some contradictory formulas in different sections, so it's not as clear-cut as you make it sound.

RE: API 620 Verifying for Maximun Allowable Working Pressure

Not that having the drawing always makes the process straight forward.  Reading scanned copies of blueprints from antiquity has proven less useful than going out with a tape measure on at least one occasion for me.  That, and drawings have been known to be straight up wrong.

Not that you wouldn't be as familiar with that as me Joe.
 

RE: API 620 Verifying for Maximun Allowable Working Pressure

And while 'taping' the tank, take a representative set of thickness measurements.  Not at all unusual to have to recalc a tank, starting with zero data.

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