thickness on painted vessel

[Kumar]

Dear Experts,

Greetings.

Just expecting your views for the UT- thickness measurements on a
painted pressure vessel (shell thick 54 mm & head 65mm) painting
thickness -250 microns. material SA 516 Gr. 70 N.

The construction phase is going on but few vessels are painted but
baseline thickness measures to be taken. Awaiting valuable feedbacks
pl.

Thanks in advance,

Kumar.

[Nitin Shetty]

Dear Kumar,

If the vessel is not coated from inside the thickness can be measured from inside too. For small bore nozzles also you get special probe which can be used to check the thickness of Pipe wall. However coming back to your question whether UT can be performed after painting my answer is NO using a conventional UT machine with zero degree probe. How ever you can use thickness gauging machine to check the wall and there are machines which can be used where the DFT is upto 2000 microns especially used for marine applications.

Regards,

Nitin Shetty.

Regards,

Nitin Shetty

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[Prasad Rode]

Whts u r question is? Pls clarify.
To perform the Ut , u have to remove the paint.

Regards
Prasad Rode

[ECHARU]

Dear experts,
Please check with your third party ndt UT technical, there are  some gauges available to measure to coating and steel thickness without removing coating. Yesterday, we conducted at this method.
To measure the thickness only.
Thankyou

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From: Prasad Rode
Sent: ‎16-‎11-‎2016 05:35
To: Materials & Welding
Subject: [MW:25707] thickness on painted vessel

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[pgoswami]

 

Hi Kumar,

 

Please take a look at the following article and suggested techniques. Olympus is a global company with many resources. A discussion may be of help.

 

Thanks.

 

Pradip Goswami, P.Eng,IWE

Welding & Metallurgical Engineering Specialist ,

Ontario,Canada.

ca.linkedin.com/pub/pradip-goswami/5/985/299

pgos...@quickclic.net

pradip....@gmail.com

 

http://www.olympus-ims.com/en/applications/measuring-metal-thickness-paint/

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[Luciano Lucas]

Prasard,
No you don't!
There are UT equipment's allowed take measurements...
without take paint..

regards,

Luciano Lucas




-----Mensagem original-----
De: material...@googlegroups.com [mailto:material...@googlegroups.com] Em nome de Prasad Rode
Enviada: terça-feira, 15 de Novembro de 2016 17:34
Para: Materials & Welding
Assunto: [MW:25707] thickness on painted vessel

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[José Juan Jiménez Alejandro]

I do not understand your question well, but according to the comments, you want to measure the wall thickness of the vessel already painted, my answer is that IF you can measure the thickness of the wall with Ultrasound measuring equipment thickness, but you need to have The function to discriminate paint, generally the modern equipments bring this function, you do not have to remove or remove the painting in any moment and can be inspected from the outside than if painted. I hope I've helped.

Regards!.

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