seawater scaling problem
seawater scaling problem
(OP)
Hi guy,
I have a problem using seawater as a cooling media. In the case, the flow of seawater need to be minimised causing the outlet temp to increase. As such, scaling become a problem when the outlet temp reaching above 40 C. Someone has suggested to use 90/10 CuNi tube, does anyone know how high can be the outlet temp of seawater without scaling? Shell & tube hex is using.
Thanks
I have a problem using seawater as a cooling media. In the case, the flow of seawater need to be minimised causing the outlet temp to increase. As such, scaling become a problem when the outlet temp reaching above 40 C. Someone has suggested to use 90/10 CuNi tube, does anyone know how high can be the outlet temp of seawater without scaling? Shell & tube hex is using.
Thanks





RE: seawater scaling problem
90/10 CuNi won't help with the scaling problem, it is, however, a material suitable for use in seawater heat exchange systems. 70/30 CuNi, titanium, duplex stainless steel, etc. are also suitable for this service.
RE: seawater scaling problem
May I know the equation to calculate the Stiff Davis Saturation Index or can you tell me where to get the equation?
Thanks
RE: seawater scaling problem
RE: seawater scaling problem
For sewater cooling there are a number of suitable alloys. You can use Ti (CP Gr2), a superferritic (S44660)or superduplex, 70/30, or a 6%Mo superaustenitic (but in todays market the price for this will be outragous).
These alloys all have upper temp limits, and fouling makes things worse. Look hard at what you can do to get your flow rates up.
= = = = = = = = = = = = = = = = = = = =
Corrosion, every where, all the time.
Manage it or it will manage you.
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