Carbon steel for deaerated water pH=9.2 O2=0,02 mg/l 109 deg.C
Carbon steel for deaerated water pH=9.2 O2=0,02 mg/l 109 deg.C
(OP)
Hello,
Please give a piece of advice: can water with 0.02 mg/l O2 content (0.2 ppb) be considered deaerated and can carbon steel be used for in this case (the service is boiler feed)?
Water temperature is 109 C (219 F)
Please give a piece of advice: can water with 0.02 mg/l O2 content (0.2 ppb) be considered deaerated and can carbon steel be used for in this case (the service is boiler feed)?
Water temperature is 109 C (219 F)





RE: Carbon steel for deaerated water pH=9.2 O2=0,02 mg/l 109 deg.C
Is this sufficiently de-aerated for a carbon steel boiler? Depends on the boiler pressure/temperature- if it's very high, it may not be OK- others more knowledgeable can advise you. For the feed water lines CS should be fine.
RE: Carbon steel for deaerated water pH=9.2 O2=0,02 mg/l 109 deg.C
There is a very good internet guide on corrosion by GE, this is an absract:
"The consensus is that feedwater oxygen, iron, and copper content should be very low (e.g., less than 7 ppb oxygen, 20 ppb iron, and 15 ppb copper for a 900 psig boiler) and that pH should be maintained between 8.5 and 9.5 for system corrosion protection."
ht
corrosion protection
hope this can help u
S.
Corrosion Prevention & Corrosion Control
RE: Carbon steel for deaerated water pH=9.2 O2=0,02 mg/l 109 deg.C