Chloride level in carbon steel pipes
Chloride level in carbon steel pipes
(OP)
Hello,
I'm working on a waste minimization project and I have a problem. We want to reuse wastewater in a cooling system. This cooling system is made of carbon steel and partly SS304. The chloride concentration is now at a maximum of 210 mg/l. Due to the reuse of water the chloride level will rise. My question is: what is an exceptable concentration of chloride for carbon steel pipes. (latest design: chloride conc. 350-500 mg/l, exceptable??)
I hope anyone can give me an indication.
Tymon
I'm working on a waste minimization project and I have a problem. We want to reuse wastewater in a cooling system. This cooling system is made of carbon steel and partly SS304. The chloride concentration is now at a maximum of 210 mg/l. Due to the reuse of water the chloride level will rise. My question is: what is an exceptable concentration of chloride for carbon steel pipes. (latest design: chloride conc. 350-500 mg/l, exceptable??)
I hope anyone can give me an indication.
Tymon





RE: Chloride level in carbon steel pipes
The stainless will be ok at this level of salinity ( if at room temperature and neutral pH), but be cognizant of the risks to the carbon steel of galvanic corrosion and the build-up of Fe concentrations, which are deleterious to stainless.
RE: Chloride level in carbon steel pipes
now the chloride level isn't a concern I can go on with the project.
Beside chloride the used waste stream contains a lot of other contaminants, but not in large quantities. It comes from a biological watertreatment facility, any possible problems known with that kind of water? I'm thinking of disolved oxygen, nitrogen containing compounds or microorganismes? Any tips or warnings?
regards
Tymon Vermeulen
RE: Chloride level in carbon steel pipes
Is the system closed enough to use corrosion inhibitors?
If not, any nitrates will inhibit corrosion.