316L pipes & Sodium Hypochlorite 2

[drakkkko]

Dear Friends,

For water treatment using Sodium Hypochlorite, Concentration 10% with temperatures between 68 °F - 104 °F, and pipes of 316L 2" SCH40, pressure working ca. 6 barg.

This pipes will be ok?, for say 20 year lifetime plant?


Regards,

 

[MJCronin]

See Section 4.3.1 of this document ....

https://www.powellfab.com/technical_information/files/810.pdf

Here, in the West, we have this tool called "GOOGLE" .... it is very powerful and useful.

When you "GOOGLE" the terms "Sodium Hypochlorite piping materials", this is the first item found

You should give it a try !!! ..... Its really great !!!!

MJCronin
Sr. Process Engineer

 

[moltenmetal]

While the reference given by MJCronin gave the answer that the OP needed, I take issue with its absolute insistence that metallic alloys (including Hastelloy, which they mis-spell) may not be used. There are alloys- including Hastelloy C alloys- that are adequately resistant to hypochlorite over a range of temperatures and concentrations.

 

[EdStainless]

Stainless is commonly used with 5% Hypo and Ni based alloys (C type and others) are frequently used for hot hypo up to 50%.
I can't see 316 holding up long term in 10%.
The other consideration is if your process is impacted by Fe, Cr, or Ni in the Hypo?
You need to know this.

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P.E. Metallurgy, Plymouth Tube