Material selection for water pump

[wd1980]

Folks;
Anyone can provide a guideline which specify how we can select the material of water pump based on chloride content.

is cast iron suitable to use in pump for water with 300 ppm cloride e.g, is there any chart as a guideline,etc.

this very urgent <Gents>.

many thanks for your support

 

[SJones]

Nickel Institute Document

Steve Jones
Corrosion Management Consultant

http://www.linkedin.com/in/drstevejones

All answers are personal opinions only and are in no way connected with any employer.

 

[kingnero]

ISO 21457 has similar tables to what you're asking.
ISO 15156-2 says something about the use of cast irons.
I'd probably go with a duplex, but I have no first hand experience with cast irons and their field of application.

 

[EdStainless]

What temp? How deep is the pump? (surface or submerged)
Anything else in the water? Will there be a risk of microbial growth?
How long does it need to last?

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P.E. Metallurgy, consulting work welcomed

 

[wd1980]

@EdStainless;
it is surface fire water pump with 50 degC Op Temperature

microbial growth : I dont think so

design life 20 years

 

[SJones]

API Std 610 - Table G.1 for fresh water suggests pump material class I-1, or I-2, which both detail cast iron parts. Cast iron is a materials selection option in NFPA 20.

Steve Jones
Corrosion Management Consultant

http://www.linkedin.com/in/drstevejones

All answers are personal opinions only and are in no way connected with any employer.

 

[wd1980]

SJones
500 ppm is it considered as a fresh water?

 

[SJones]

Good question. I wouldn't fancy drinking it. It's certainly not 'fresh' enough for stainless steel.

Steve Jones
Corrosion Management Consultant

http://www.linkedin.com/in/drstevejones

All answers are personal opinions only and are in no way connected with any employer.

 

[wd1980]

SJones
fair enough
thx

 

[EdStainless]

500ppm is beyond where I would use 316. Historically this would be done with bronze (AlBronze or NiAlBronze).
You could do this with cast duplex SS.
Honestly most cases would be done with CI and an understanding that impellers will need periodic replacement.

Look at some of these

https://nickelinstitute.org/media/1705/ign-4-25-02.pdf

https://nickelinstitute.org/media/1...rdesalinationandoilfieldbrinepumps_11004_.pdf

https://nickelinstitute.org/media/1...ocorrosioninnaturallyoccuringwaters_1262_.pdf

= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, consulting work welcomed

 

[blacksmith37]

Nickel Aluminum Bronze is very good in sea water and I expect in anything with less chlorides . Amoco used this in a few fields for salt water and CO2 injection.

 

[Jacey Tome]

Further, stainless steel impellers are widely used where bronze would not satisfy the requirements for corrosion, erosion and/or cavitation resistance. For the pump casing, cast iron is the generally preferred material in most water and wastewater pumping applications

https://www.mie-solutions.com/mie-blog/manufacturing-software-systems-reduce-time-material-waste