×
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

Propane Shpere Storage Tank

Propane Shpere Storage Tank

Propane Shpere Storage Tank

(OP)
Good morning,

Our plan is to perform an external/on-stream inspection for a Propane Sphere Storage Tank including visual and UT thickness measurement only to assess its existing situation.

Can anyone provide me with a typical grid as CMLs (Corrosion Monitoring Locations) used to measure the thickness? and I would also appreciate any advice concerning the subject.

Could you be kind enough to inform me about the critical points to focus during our inspection?

Thank you very much.

RE: Propane Shpere Storage Tank

Propane shouldn't have any water in it, but in case some has crept in then the bottom 10" of the sphere may need enhanced inspection.

Most issues will be around teh attachment points for the legs and any areas where water accumulates / doesn't drip off. So the top and bottom.

Spacing - not a clue but if asked to guess I would say every 200-300mm grid over most of the tank and 100mm at crucial areas.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

RE: Propane Shpere Storage Tank

(OP)
Thanks for reply.

So, is pneumatic test could be a suitable alternative, instead of hydraulic pressure test?

Regards,

RE: Propane Shpere Storage Tank

That's a completley different question. Your question was about external insopection. Now you're suddenly talking about a pnuematic pressure test??

No details, so no answer.

But pneumatic testing of a sphere carries significant risks in terms of consequence of failure. Any test can fail, that's why you're doing the test.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

RE: Propane Shpere Storage Tank

Pneumatic test of giant spherical tank ?....How far away will people be able to hear the KA-BOOM ?

I say three miles ....

________________________________________________________________________________________________________________

How big is the tank ? How old ? What materials ? .... Are there any details available at all ???? ... any detail drawings ?

Any code dataplates or ASME U1 documentation ?....... Oh wait, were the dataplates covered by paint or stolen by vandals ?

Can you supply any vessel design drawings ? .... Oh wait, the plant staff threw them all away years ago !!!

How about pictures ?.... Do they have cellphones in your country ?

MJCronin
Sr. Process Engineer

RE: Propane Shpere Storage Tank

Quote (Inchtain

....Our plan is to perform an external/on-stream inspection for a Propane Sphere Storage Tank including visual and UT thickness measurement only to assess its existing situation.)


Probably it will be better to study ( API 579-1ASME FFS-1, Fitness-For-Service ) before tests.. I will suggest you, to look this doc. and prepare job specific inspection programe . Some concerns ; corrosion, flaws, fatigue ..the remaining service life ..

https://www.asme.org/codes-standards/find-codes-st...

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