Re: Ammonia pipe minimum wall thickness

From: <Gordon.Reddek@Alcan.com>
Date: Wed Mar 31 2004 - 17:37:00 EST

Perry's Chemical Engineers Handbook Table 23-2 gives corrosion rates of many chemicals on many materials including aqueous Ammonia on steel

"Arturo M." <amurillo@t-visa.com.mx>
01/04/2004 02:32 AM
Please respond to PipingDesign

         To:     <PipingDesign@yahoogroups.com>
         cc:
         Subject:        [PipingDesign] Amnonia pipe minimum wall thickness

Hello all.

There is an Ammonia Industrial Refrigeration system, with a low pressure side (Receiver and evaporator) and works about at 200 psi, we specified a 14" seamless STD pipe carbon steel A-106 gr X42 ( wall 0.375" ) .

Someone is argued that a minimum of Schedule 40 pipe is needed at ( wall 0.438" ), temperature pressure is not a problem he said , Corrosion is the thing to watch out.

So the question is, where can I find the standard norm for correction for corrosion for industrial ammonia for the pipe wall? ( the factor I used was 1/64" ) .

Thank you.

Arturo Murillo.

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Received on Wed Mar 31 17:37:00 2004