Desalination plants — both thermal (MSF, MED) and membrane (SWRO) — represent a major and growing market for specialty buttweld fittings. Seawater at elevated temperatures creates one of the most corrosive environments in industrial piping, demanding CuNi 70/30, duplex, and super duplex grades.
MSF evaporator stages, brine heater circuits, and heat recovery sections. CuNi 70/30 for seawater at elevated temperatures (above 60°C). SS 316L for distillate piping. Duplex for high-pressure brine circuits.
High-pressure seawater feed (60–80 bar), energy recovery circuits, and concentrate disposal. Super duplex S32750 for high-pressure seawater piping where pitting resistance is critical.
Intake screens, pre-filtration, and chemical dosing systems. CuNi 90/10 for seawater intake piping. SS 316L for chemical dosing lines (antiscalant, chlorine, coagulant).
Brine concentrate disposal and produced water treatment. High chloride, high TDS environment requires duplex minimum. Super duplex for high-temperature concentrate piping.
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