Depends on the temperature and chlorides concentration and the application. The Austenitic Stainless Steel materials have a reasonable resistance to pitting corrosion and stress induced corrosion cracking at ambient temperature and up to some 35-40 deg C. Above this temperature the resistance decreases and other higher alloy materials are required, including materials like titanium or CuNi alloys. For example, the sea water is high in chlorides concentration and for relative low pressure and ambient temperature, you can use poly pipe material, Stainless Steel or higher alloys. Please note that every application should have a proper piping specification for handling the water containing chlorides. All the above is only a hint to what you should looking for, not an advice covering your application. If you can share with us the application, pressure and temperature of the fluid and also the composition of the brine, you might get some specific advice for your application.
Best regards,
gr2vessels
It also matters what else is in the water. Is it natural water (with lots of living organisms in it) or is it treated?
There are good guides for this, but we need to know the application and conditions in more detail to even know where to start.
If you are talking about treated drinking water, the AWWA will have standards for it. Beware of internal crevices resulting from incomplete weld penetration, they are killers.
