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.
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
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
So, is pneumatic test could be a suitable alternative, instead of hydraulic pressure test?
Regards,
RE: Propane Shpere Storage Tank
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
I say three miles ....
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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
The guidance notes free: https://www.bindt.org/shopbindt/hois-documents/HOI...
Steve Jones
Corrosion Management Consultant
www.linkedin.com/in/drstevejones
All answers are personal opinions only and are in no way connected with any employer.
RE: Propane Shpere Storage Tank
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...