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Kevin Cai
Active Contributor

Join Date: Nov 2011
Posts: 13

Internal Coated and Corrosion Allowance

06/07/2012 4:21 PM

Hi friends,

I am dealing with tanks for water containing service which an engineering company specified internal coating (for corrosion protection) but also with 1.6 mm corrosion allowance. To me if internal coating is specified you will not need to specify corrosion allowance. Does any one have experience or idea?

Is there any standard specifying internal coationg of tanks/vessels with corrosion allowance?

Your comments/help is appreciated.

Kevin
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PWSlack
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United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

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Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
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#1

Re: Internal Coated and Corrosion Allowance

06/11/2012 3:23 AM

It depends upon the properties of the water and the materials of the tank, neither of which have been specified in the original posting.

  • Plastic tanks don't deteriorate in contact with water, and a corrosion allowance would therefore be inapplicable. Neither do they need an internal coating.
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Kevin Cai
Active Contributor

Join Date: Nov 2011
Posts: 13
#2
In reply to #1

Re: Internal Coated and Corrosion Allowance

06/11/2012 9:52 AM

Thanks for your response. The tank material is carbon steel. So I wonder if it is necessary to specify corrosion allowance together with internal coating (all internal).

No corrosion allowance will be specified for plastic.

Kevin
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