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Use of sea water for surface condensers for sugar industry

I want to use sea cold water for the surface condenser for a sugar industry. The vapor temperature is maximum 65 °C. The vapors are slightly acidic in nature.
I want to use sea water for the condenser & the heated water back to sea. Since the operating temperature is low, I opine there should not be any environmental problem. Maybe I shall use more water so that the raise in temperature is very marginal.
I want to know the following:
1. Material of construction of pumps.
2. Material of construction of pipe system.
3. Material of construction of Surface condenser i.e. tube plate/outer shell coming in contact with sea water & the tubes.

Thippeswamy. Majjigi.
Designer - Mumbai, Maharashtra, India
October 19, 2011

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