Stainless Steel and Domestic Hot Water Storage Tanks
Stainless Steel and Domestic Hot Water Storage Tanks
(OP)
thread391-154102: Stainless steel hot water storage tanks
I read the thread above and it told me there is no consensus on the use of 304/316L for potable hot water storage tanks - although the research I have done indicates a preference to not use 304/316L.
I have a vendor who has tanks that use 420 stainless. I am not familiar with that type. My research indicates it is used for cutlery among other things.
Would 420 stainless be good material for lining or constructing hot water storage tanks (~160 F with normal chlorine/chloride levels for drinking water)?
I read the thread above and it told me there is no consensus on the use of 304/316L for potable hot water storage tanks - although the research I have done indicates a preference to not use 304/316L.
I have a vendor who has tanks that use 420 stainless. I am not familiar with that type. My research indicates it is used for cutlery among other things.
Would 420 stainless be good material for lining or constructing hot water storage tanks (~160 F with normal chlorine/chloride levels for drinking water)?





RE: Stainless Steel and Domestic Hot Water Storage Tanks
How much experience does this guy have? Can he show you some 10 year old tanks? I wouldn't use 420. It has too much carbon and the welds will be brittle and susceptible to localized corrosion.
Look at 439, don't go with less than 17% Cr, you'll be sorry.
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Plymouth Tube
RE: Stainless Steel and Domestic Hot Water Storage Tanks
in my opiion you've first to define how much chlorides in in the water then you can assess if SS is suitable or not..
http:/
Selection of stainless steels for water tank applications
http://www.bssa.org.uk/topics.php?article=88
S
Corrosion Prevention & Corrosion Control
RE: Stainless Steel and Domestic Hot Water Storage Tanks
If you can't do it with 439 then you need to be looking at coated tanks instead of SS.
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Plymouth Tube
RE: Stainless Steel and Domestic Hot Water Storage Tanks
This manufacturer is trying to sell his 420 SS lined tanks over the 304/316 or even the other (glass or Cu/Ni) linings.
RE: Stainless Steel and Domestic Hot Water Storage Tanks
I have seen 300 tanks fail in restaurants from external SCC. People were careless and got cleaning fluid on them and such. I have done some consulting work in this field.
Stick with your glass lined tanks if they have been working.
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Plymouth Tube