Water & DesalinationDesalination
Pump casing – seawater lift / booster pumps (SWRO / MSF / MED feed)
Super duplex mandatory for RO HP pump casings >PN40 or Cl⁻ >1000 ppm. API 610 / ISO 9906 compliance. NACE MR0175.
Specifications
Material
Super Duplex SS ASTM A890 Gr5A (CD3MWCuN); Duplex A890 Gr4A; Bronze CC333G (legacy)
Grades
CD3MWCuN
Material Class
Super DuplexDuplexBronze
Applicable Standards
ASTM A890 Gr5ANACE MR0175API 610ISO 9906
Common Processes
Investment casting / ceramic shell (duplex/super duplex); sand casting (bronze)
NDT & Inspection
Hydrostatic 1.5× rated; PT (SS/duplex); dimensional (CMM impeller clearances)
Typical Specs & Notes
Super duplex mandatory for RO HP pump casings >PN40 or Cl⁻ >1000 ppm. API 610 / ISO 9906 compliance. NACE MR0175.
⚠ Caveats
Super duplex mandatory for RO HP pump casings >PN40 or Cl⁻ >1000 ppm.