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Reinforcement plate installed to keep tolerance inside of tank
3

Reinforcement plate installed to keep tolerance inside of tank

Reinforcement plate installed to keep tolerance inside of tank

(OP)
Hey guys.
Is in the API 650 code any paragraph that forbid to use reinforcement plates intalled inside of the tank to keep and fit peaking & banding tolerances?
I attach a picture that shows plates welded. Personally, I think that it is a bad practise and it can affect the performance of the tank life introducing residual stress. In adittion I think that these plates can be corrosive points in a near future.

RE: Reinforcement plate installed to keep tolerance inside of tank


I just see alignment lugs, plates attached by welding for erection purpose and they are Temporary attachments .

API 650 states,

Quote (Temporary
attachments to shell courses shall be removed, and any resulting damage shall be repaired and ground to a smooth profile)


RE: Reinforcement plate installed to keep tolerance inside of tank

"Question: Is it permissible to install stiffening rings on cone roof tanks to maintain the roundness, peaking, and banding requirements set forth in Section 5?
"Answer: No."
This is an interpretation of November 9, 1994, for the 9th Edition of API-650, published in "Answers to Technical Inquiries" in 1997.
It references Section 5, which has since been renumbered to Section 7.

RE: Reinforcement plate installed to keep tolerance inside of tank

(OP)
Thanks guys.. this info was really so important... I was guessing that it could be forbidden. I think that these plates can affect directly the life time of the tank.. Do you know if are there any article that talks about this kind of problems or issues and treats this topic deeply?.. I really appreciate your answers!

RE: Reinforcement plate installed to keep tolerance inside of tank

Be firm, tell your boss about the relevant interpretations and close the topic. No need to dig further.

DHURJATI SEN
Kolkata, India

RE: Reinforcement plate installed to keep tolerance inside of tank



Quote (...Be firm, tell your boss about the relevant interpretations and close the topic. No need to dig further.)


Dhurjati Sen ; Good respond a pink star for you !..

RE: Reinforcement plate installed to keep tolerance inside of tank

Thanks for the star, HTURKAK Sir !

DHURJATI SEN
Kolkata, India

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