Plate heat exchanger Material 1

[vjr0512]

Dear all
For one of the project, we have been asked to select Duplex stainless steel material for the Plate heat exchanger Plates as the Chloride content in the cooling water is more than 300 ppm. Vendor had offered for 254SMO and when enquired they informs that Plates are not available in Duplex Stainless steel. As the process side does not allow to use Cu Ni alloy we have no other option to use higher cost material 254 SMO...Is there any other alternative. The process side is also hot water used in Polypropylene industry to cool the PP pellets washed water.

Thanks to share your thoughts.

 

[EdStainless]

Duplex is difficult to form into HX plates because of higher strength and lower ductility. The high alloy austenitics (254SMo and the 6%Mo grades) are commonly used for this application.

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P.E. Metallurgy, consulting work welcomed

 

[TugboatEng]

Titanium is standard for us in the salt water marine industry.

 

[EdStainless]

Yes, it tens to be 316 for easy service, SASS for more corrosive service, and Ti for full on seawater.
There are niche applications for 90/10 CuNi and few other alloys.

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P.E. Metallurgy, consulting work welcomed

 

[Dhurjati Sen]

Who has asked you to select Duplex? The FEED guy? If yes, revert to them for alternatives.

DHURJATI SEN