Water & Desalination
Water & Desalination sector castings — SICAST Sand Steel Casting portfolio.
Water & Desalination castings
Desalination
11 items
Water & Desalination
Brine recirculation pump casing & impeller
Duplex SS ASTM A890 Gr4A (CD3MN); Super Duplex Gr5A for high temp brine
High temperature brine (+90°C MSF / +70°C MED) – duplex SS with adequate PREN. NACE guidelines for H₂S traces in brine.
Water & Desalination
Chemical dosing valve & injector bodies (chlorine, antiscalant, acid)
Stainless Steel CF8M (316SS) / CF3M (316L); Titanium Grade 2 (HCl acid service)
Potable / process water – NSF 61 or WRAS approval required where applicable. Full material traceability EN 10204 3.2.
Water & Desalination
Distillate / condensate pump casing (low salinity)
CF8M (316L SS); Ductile Iron GJS-400-18 with FBE (lower cost option for distillate)
Low salinity distillate – lower corrosion risk than SW feed. NSF 61 approval for potable distillate output.
Water & Desalination
Energy recovery device (ERD) housings / rotary pressure exchanger bodies
Super Duplex SS A890 Gr5A; ceramic-lined ductile iron (some legacy designs)
Running clearances very tight – CMM verification mandatory. Seawater duty – PREN >40 required.
Water & Desalination
Heat transfer chamber / flash chamber nozzle castings
Carbon Steel ASTM A216 WCB (clad) / CF8M SS (small nozzles)
ASME VIII pressure vessel code. Weld overlay / cladding often applied post-casting for corrosion surfaces.
Water & Desalination
High-pressure pump casing (RO feed, 60–80 bar)
Super Duplex SS ASTM A890 Gr5A; Duplex CD4MCu for moderate chloride
API 610 pump standard. NACE MR0175 sulfide stress cracking requirements not typical but SS grade selection per seawater corrosion resistance (PREN >40 for super duplex).
Water & Desalination
Membrane pressure vessel end-caps / closures (cast versions)
Ductile Iron GJS-500-7 (FBE lined); Carbon Steel ASTM A216 WCB (FRP-lined)
ASME Section VIII or PED 2014/68/EU as applicable. FBE or epoxy internal coating – NSF 61 for potable RO output.
Water & Desalination
Pump casing – seawater lift / booster pumps (SWRO / MSF / MED feed)
Super Duplex SS ASTM A890 Gr5A (CD3MWCuN); Duplex A890 Gr4A; Bronze CC333G (legacy)
Super duplex mandatory for RO HP pump casings >PN40 or Cl⁻ >1000 ppm. API 610 / ISO 9906 compliance. NACE MR0175.
Water & Desalination
Pump impeller – seawater service (centrifugal / vertical turbine)
Super Duplex SS A890 Gr5A; CF3M (316L) for lower chloride service
Blade profile accuracy critical for NPSH & efficiency. Balance G2.5 minimum. WRAS / NSF 61 not applicable – seawater duty.
Water & Desalination
Seawater intake screen housings / traveling screen frames
Ductile Iron EN-GJS-500-7; Super Duplex SS ASTM A890 Gr5A (aggressive SW)
Sea water service: chloride resistance critical. NACE MR0175 or equivalent for SS grades. FBE or rubber lining for DI in SW service.
Water & Desalination
Strainer bodies / duplex strainer housings (SW pre-filtration)
Ductile Iron EN-GJS-500-7 (low salinity); Duplex SS CF8M or CD4MCu
Basket / screen element in SS 316L min. Flanged connections to EN 1092-2 or ANSI B16.5.
Distribution Network
4 items
Water & Desalination
Ductile iron flanged fittings (tees, elbows, reducers, bends – DN80–DN1200)
Ductile Iron EN-GJS-500-7 / ISO 2531 C-class
EN 545 / ISO 2531. Internal CML (ISO 4179) or FBE. External zinc (200g/m²) + bitumen (ISO 8179). Flanges to EN 1092-2. GCC: SASO 1063 / ISO 2531 reference.
Water & Desalination
Flange adaptors & couplings (transition between pipe materials)
Ductile Iron GJS-500-7
EN 545 / ISO 2531. WIS 4-24-01 (UK ref). EPDM gaskets. SS 316 bolting for buried / submerged. Accommodates DI-to-HDPE / DI-to-steel transitions.
Water & Desalination
Mechanical joint (MJ) fittings (gland & follower castings)
Ductile Iron GJS-500-7
AWWA C110 / C153. T-bolts: SS 316 or galvanised (GCC buried: SS preferred). Gaskets: SBR or EPDM.
Water & Desalination
Spigot & socket push-fit fittings (DN80–DN600, buried distribution)
Ductile Iron GJS-500-7
ISO 2531 / EN 545. EPDM gaskets EN 681-1. Restrained joint types (Tyton, Viking Johnson) for GCC high-pressure cross-country mains.
Transmission Pipeline
10 items
Water & Desalination
Air release / air vacuum valve body (rising mains, GCC cross-country pipeline)
Ductile Iron GJS-500-7; SS CF8M (aggressive / desalinated water)
EN 1074-4 / AWWA C512. Float: SS 316L. Seat: EPDM. WRAS / NSF 61. Critical on undulating GCC desert pipeline profiles.
Water & Desalination
Ball valve body (DN15–DN200, instrument / control service)
Carbon Steel ASTM A216 WCB; SS CF8M (304) / CF3M (316L); Ductile Iron (utility sizes)
API 6D / ASME B16.34. FBE for potable service. Fire-safe design to API 607 where required.
Water & Desalination
Butterfly valve body (DN200–DN1200 pipeline duty)
Ductile Iron GJS-500-7 (dominant in GCC distribution); CS WCB (high pressure)
EN 593 / ISO 10631. AWWA C504. Disc in SS 316 or coated DI. EPDM seat (WRAS / NSF 61). FBE body coating.
Water & Desalination
Check (non-return) valve body (swing / dual plate / tilting disc)
Ductile Iron GJS-500-7; Carbon Steel WCB; Bronze CC491K (small bore)
EN 12334 / AWWA C508. Disc / flap: SS 316L. Hinge pin: duplex SS or bronze. WRAS for potable.
Water & Desalination
End-suction centrifugal pump casing (utility / distribution booster)
Ductile Iron GJS-400-15 / GJS-500-7
ISO 2858 / EN 22858. Back pull-out design standard. Internal FBE or epoxy (NSF 61). Wear rings: SS 304.
Water & Desalination
Gate valve body & bonnet (mainline isolation, DN50–DN600)
Ductile Iron EN-GJS-500-7 (PN16–PN25); Carbon Steel ASTM A216 WCB (PN40+); SS CF8M for aggressive service
EN 545 / ISO 2531 for DI. AWWA C500 (US). FBE internal coating to NSF 61 / WRAS for potable. Buried: zinc + bitumen external. EN 10204 3.1 cert minimum.
Water & Desalination
Horizontal split-case pump casing (main transmission pumping stations)
Ductile Iron GJS-400-18 / GJS-500-7; Carbon Steel WCB (high head booster)
ISO 9906 / ANSI HI 1.1. API 610 for high pressure. Internal FBE or CML (NSF 61 / WRAS). Impeller SS CF8M or duplex.
Water & Desalination
Pressure reducing valve (PRV) body (district metering zones)
Ductile Iron GJS-500-7 (DN50–DN300); Bronze CC491K (small DN15–50)
EN 1567 / AWWA C530. Pilot and control internals: SS or bronze. WRAS approval mandatory (GCC SASO equivalent where applicable).
Water & Desalination
Pump impeller (closed / semi-open, water service)
Bronze CC333G / CC491K; SS CF8M (316); GJS-400-15 (low cost)
Blade profile and balance critical for NPSH and efficiency. Near-net-shape + CNC finish. NSF 61 / WRAS for potable contact.
Water & Desalination
Vertical turbine pump bowl assembly & column pipe castings
Ductile Iron GJS-500-7 (bowls); Bronze CC333G / SS CF8M (impellers)
AWWA E101. Used extensively in GCC desalinated water booster stations. Internal epoxy coating. Submersible motor coupling alignment critical.
Water Meters & Flow Control
3 items
Water & Desalination
Bulk water meter body (DN50–DN300, electromagnetic / Woltmann)
Ductile Iron GJS-500-7 (DN80+); Bronze CC491K low-lead (DN50–DN80)
ISO 4064 / EN 14154. OIML R49. WRAS / NSF 61. Low-lead bronze (<0.25% Pb) mandatory. GCC: SASO 1784 reference.
Water & Desalination
Domestic water meter body (DN15–DN40)
Bronze / Gunmetal CC491K (low lead); DZR brass (cast versions)
ISO 4064 Class C. Low-lead (<0.25% Pb) mandatory GCC / EU. NSF/ANSI 61.
Water & Desalination
Pressure sustaining / pressure relief valve body
Ductile Iron GJS-500-7; Bronze CC491K (small DN)
EN 1074-2. WRAS where potable. Pilot internals: SS / bronze. Diaphragm: EPDM.
Water Storage & Treatment
3 items
Water & Desalination
Filter underdrain / diffuser nozzle castings
Grey Cast Iron GJL-250; SS 316L (chemical dosing zones)
Material must be chlorine resistant (GCC uses high chlorine doses). SS preferred in chlorination contact zones.
Water & Desalination
Penstock (sluice gate) frame & door (reservoirs, WTP, pump stations)
Ductile Iron GJS-500-7 (modern preferred); Grey Cast Iron GJL-250 (legacy)
BS 7775 / AWWA C561. Seating faces: stainless insert or white metal. Spindle: SS 316 or bronze. Rising or non-rising. GCC: often stainless-faced for desalinated water contact.
Water & Desalination
Screw / centrifugal pump casing for WTP sludge / return sludge
Grey Cast Iron GJL-250; Ductile Iron GJS-500-7; Rubber-lined DI for abrasive sludge
ISO 9906. Wear allowance specified in wall thickness. Rubber lining per ASTM D2000 / ISO 3601 for abrasive service.
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