Seawater Heat Exchangers are heat exchangers where seawater is used for cooling process fluids in maritime, iron and steel industries. Considering the corrosive effects of sea water, they are manufactured from materials resistant to sea water. They can be produced in various shapes and sizes according to project and process requirements. Cleanliness plays an important role in seawater heat exchangers. Reduced heat transfer and increased pressure losses directly affect the efficiency of the exchanger. In order to clean the heat exchanger periodically, heat exchangers are designed in accordance with TEMA standards.