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Nitric acid Pipe lines

Nitric acid Pipe lines

Nitric acid Pipe lines

(OP)
why the designer select material for pipe will used for nitric acid as 304L with special containt NI > 9.5 % , why he didn't select 316L which include higher containt of NI ?

RE: Nitric acid Pipe lines

(OP)
thanks alot metengr ,
the temperature for the nitric acidd procees various between 122 °F to 290 °F .
nitric acid with 60% concentration fed to the nitric acid storage tank

RE: Nitric acid Pipe lines

Your design for the pipe should be based on the highest temperature the pipe will see in terms of 60% nitric acid concentration. Look very closely at Figure 5 for material selection.

RE: Nitric acid Pipe lines

(OP)
so 304L special & 310L special are acceptablebut why it's specified this special NI content specially NI > 9.5 % , WHY IT'S NOT 8% , low carbon and no MO content why also?

RE: Nitric acid Pipe lines

The information is in the publication.

RE: Nitric acid Pipe lines

Mo does not help corrosion resistance in clean nitric acid.
I would be looking for special acid grade 310S for your application.

= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, Plymouth Tube

RE: Nitric acid Pipe lines

(OP)
thanks alot metengr & Edstainless

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