Water Quality & Stainless Electric Boilers
Water Quality & Stainless Electric Boilers
(OP)
My company makes miniature electric boilers for both high and low purity water applications. As per PEB 5.3 we require deionized water greater than 1 Mego-Ohm/cm if the boiler is constructed from austenitic stainless steel. Conversely, we also require stainless steel if the water purity is greater than 1 Mego-Ohm/cm. I understand that stainless steel boilers are susceptible to stress corrosion cracking therefore you must use treated water. It is also my understanding that water with high resistivity will aggressively attack carbon steels like SA-53B or SA-516-70. I have two questions:
1) What would be a safe water quality standard for miniature boilers constructed from SA-53B and SA-516-70?
2) Why does the requirement PEB 5.3 only apply to electric boilers of the immersion element type? I would think that any boiler regardless of heat source should have this requirement however I did not find an analogous statement elsewhere in the code. Is there some simple explanation here that I am missing?
As always, the help here is amazing and you guys (and gals) are great. Thank you in advance for all of your help!!
-Steris
1) What would be a safe water quality standard for miniature boilers constructed from SA-53B and SA-516-70?
2) Why does the requirement PEB 5.3 only apply to electric boilers of the immersion element type? I would think that any boiler regardless of heat source should have this requirement however I did not find an analogous statement elsewhere in the code. Is there some simple explanation here that I am missing?
As always, the help here is amazing and you guys (and gals) are great. Thank you in advance for all of your help!!
-Steris





RE: Water Quality & Stainless Electric Boilers
-Steris