The desafination of water and treatment plants utilize extreme environments such as rough fluids, aggressive chemicals, and high strain chloride fluids. Mission critical components that require powerfully corrosive resistant materials along with flexible design options within the structure will benefit from the modern technology of stainless steel casting.
Key Applications of Stainless Steel Castings
Pump Systems
Components: Impellers, volutes, casings
Demand: Cavitation erosion resistance as well as pitting from chlorides (for seawater pumps). Use of 316L or Super Duplex 2507 stainless steels can triple the service life compared to standard alloys.
Valves & Fittings
Challenge: Preserving seal integrity in extremely high-pressure pipelines transporting chemically aggressive brines.
Solution: Precision ceased castings provide stainless steel with a solution challenging brine transportation with zero leaks during operation and low required maintenance intervals.
Desalination Membranes & Housings
Super Austenitic (254 SMO) castings withstand 50,000+ ppm chlorides in RO systems, preventing contamination.
Filtration Components
Sand filters, screen baskets, and agitators leverage cast stainless’s abrasion resistance.
Material Selection: Grades Matter
316/316L: Protects from low-salinity water corrosion at a lower cost.
Duplex 2205: Good choice for brackish water (higher strength + average corrosion resistance).
Super Duplex 2507 & grades with 6% molybdenum: Crucial for seawater desalination and harsh chemical treatments.
4 Reasons to Choose Cast Stainless Steel
– Corrosion Resistance: Cr, Ni, and Mo form passive layers against rust (¼ inch thick protects up to ten times longer).
– Surface Hygiene: Suitable for drinking water; FDA/NSF compliant stainless steel surfaces.
– Closed Shape Features: Integrally casted components like blades cannot be made by machining.
– Lifecycle Cost Efficiency: More expensive upfront but less frequent replacements lowers TCO leading to reduced total cost of ownership.