The core business of Wärtsilä has been focused on the ship nozzles market. For many years they have worked on the development of different kind of models seeking to improve efficiency. All of the models produced in the plant, cover the inner nozzle structure in 33, 66 or 100% stainless steel AISI 316L depending on the requirements of each customer.
The main reason for this is to prevent corrosion on the propeller area and to extend the useful life of the equipment during service. The stainless steel ring gives the highest structural strength.
The most important supplier for this material is ACERINOX and the most common thicknesses used are: 15, 18, 20 and 25 mm.