MOC for CFG Pump on hot NaCl brine duty
MOC for CFG Pump on hot NaCl brine duty
(OP)
What are possible pump MOC choices for a hot (90 C) NaCl brine duty. The brine is saturated approx. 27% w/w. Due to the chloride crevice corrosion / pitting potential of NaCl I'm not sure what might be a cost effective MOC selection?
The pump is relatively small in capacity & has only a very modest head requirement. i.e. 50 m3/hr @ 20 m differential head.
The pump is relatively small in capacity & has only a very modest head requirement. i.e. 50 m3/hr @ 20 m differential head.





RE: MOC for CFG Pump on hot NaCl brine duty
I would go straight to Ni-Cr-Mo-W ("C" type alloy) for this.
If it will be cast then CX-2WM would be the best option.
And SiC for seals.
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P.E. Metallurgy, Plymouth Tube
RE: MOC for CFG Pump on hot NaCl brine duty
Are any of the polymers an option? Perhaps a lined metal? e.g. PVDF / PFA / FEP? Glass Fiber Reinforced Polypropylene?
Alloy C is great but I suspect the quotes are going to be impressively high. :)
RE: MOC for CFG Pump on hot NaCl brine duty
RE: MOC for CFG Pump on hot NaCl brine duty
The only composites that will work here are equally impressive, PEEK, PPS, PES and similar would work with carbon fiber reinforcement.
I think that you will have better luck finding cast CX-2WM than PPS.
I wouldn't trust coating in this aggressive of an environment. Any slight failure will have catastrophic results.
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P.E. Metallurgy, Plymouth Tube
RE: MOC for CFG Pump on hot NaCl brine duty