Materials selection for Pump (32% Caustic)
Materials selection for Pump (32% Caustic)
(OP)
I have fresh caustic feed pump (metering pump). It has 32% caustic. Can I use Carbon steel for it.
The design temperature 65C. If carbon steel selected, it should be PWHT. right?
Thanks.
The design temperature 65C. If carbon steel selected, it should be PWHT. right?
Thanks.





RE: Materials selection for Pump (32% Caustic)
My preference is to use this page: http://www.coleparmer.com/techinfo/chemcomp.asp or http://flw.com/datatools/compatibility/
Sometimes they tend to give slightly different results but I find them to be a good guideline
RE: Materials selection for Pump (32% Caustic)
RE: Materials selection for Pump (32% Caustic)
Thanks.
unfortunately, this is a new selection. I can not find the materials in API 610.
RE: Materials selection for Pump (32% Caustic)
RE: Materials selection for Pump (32% Caustic)
What flow/head are you looking for ?
Ash Fenn
www.cdrpumps.co.uk
RE: Materials selection for Pump (32% Caustic)
I will talk with our client.
RE: Materials selection for Pump (32% Caustic)
Otherwise- if you've got a relatively stable temp carbon steel should be fine at that temperature- PWHT is recommended by the NACE chart- particularly if you expect to run that hot all the time
RE: Materials selection for Pump (32% Caustic)
Austentic stainless steels (304 SS, 316 SS, Alloy 20) should not be used above 140 F(60 C)due to onset of stress corrosion cracking. Nickel 200 is used above 140 F.
At 65 C you could use a teflon diaphragm metering pump with teflon ball checks.
Brands are American Lewa, Prominent, Bran+Luebbe, Milton-Roy, Pulsafeeder