DI Water and Stainless Steel

[KenRad]

Can someone tell me what types of stainless steel can and can't be used in a DI water system (resistivity > 15 MOHM)? The application is makeup water for a steam humidifier.

 

[stanier]

Go to the

http://www.nidi.org

site for the technical paper you need. Try the paper on stainless steels for the process industries. I have seen ASTM tp 316 or 316L used on DI water. I would preferably use a thermoplastic such as ABS . see

http://www.eurapipe.com.au

to reduce the risk of corrosion and the cost of installation. The majority of RO and MF modules are constructed in ABS. See US Filters (Memtec) designs.

 

[Techcitizen]

We have SS 304L Or MSRL (MS rubber lined) for most of DI water (resistivity > 10 mohm) piping in our plant. Have also used SS304 or HDPE piping at few places. Hope this helps !