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Products & Solutions
Water Treatment Steel
Water Treatment Steel
Water Treatment Steel （ Pipes & Steel Materials for Water Treatment Plants)
1) Overview
Water treatment plants (both potable water and wastewater) operate in environments involving continuous immersion, chloride-rich fluids, acidic/alkaline wastewater, disinfectants (chlorine, ozone, sodium hypochlorite), and sludge systems.
Pipes and structural steels must offer corrosion resistance, pressure resistance, chloride SCC resistance, and MIC resistance.
2) Manufacturing Process
• Pipe Forming: Hot rolled, cold drawn, welded (LSAW/HFW/SAW)
• Lining: Cement mortar, epoxy, PTFE, PVDF, PP, glass flake lining
• Cladding: Explosion bonded, hot roll cladding, mechanical lining
• Heat Treatment: Solution annealing, normalizing, tempering
• Surface Protection: Pickling, passivation, galvanizing, epoxy/FBE
3) Grades & Standards
Structural & Equipment Steel:
• Carbon steel (Q235/Q345): tanks, clarifiers, sludge scrapers
• Stainless steel (304/316L): UV channels, filters, dewatering machines
• Cast iron / Ductile iron: pumps, valves, joints
Pipeline Materials:
• Ductile iron pipes (DCI): DN600–3000 main water transmission
• Carbon steel pipes (ASTM A106, API 5L): pressure pipelines (lined with cement/epoxy)
• Stainless steel pipes (ASTM A312 304/316L, Duplex 2205): dosing, sampling, corrosive fluids
• HDPE / UPVC / CPVC: sludge lines, chemical dosing, auxiliary drains
• FRP pipes: large-diameter low-pressure water and ventilation
• Cu-Ni & Titanium: seawater desalination, cooling water systems
Standards: ASTM, ASME, API, GB/T, EN, ISO, DIN
4) Dimensions
• Pipes:
• Large-diameter: DN600 – DN3000+ (intake/outflow mains)
• Medium-diameter: DN150 – DN600 (process pipelines, sludge circulation)
• Small-diameter: DN15 – DN150 (dosing, instruments, compressed air)
• Fittings: DN15 – DN1200 (BW/SW/FL/grooved)
• Flanges: DN15 – DN2000, pressure Class 150 – 600
5) Applications
• Raw Water & Intake: ductile iron or large-diameter steel pipes
• Wastewater & Sludge: HDPE, lined steel, stainless steel
• Desalination: Duplex 2205/2507, Cu-Ni, titanium pipes
• Chemical Dosing & Disinfection: UPVC/CPVC, PTFE/PVDF lined pipes
• Reclaimed Water Systems: stainless steel + lined pipes
6) Key Features
• Corrosion resistance: chloride SCC, acid/alkali, MIC
• Pressure rating: Class 150 – 600
• Long service life: lined & alloy pipes extend durability
• Customizable: OD, wall thickness, linings
7) Quality & Testing
• Chemical analysis: spectrometry
• Mechanical tests: tensile, impact, hardness
• Corrosion tests: salt spray, immersion, chloride SCC
• NDT: UT, RT, ET, MT
• Pressure testing: hydrostatic & pneumatic
• Certifications: ISO, PED, NACE, TUV, SGS
8) Supply & Packaging
• Supply: seamless/welded pipes, lined pipes, FRP pipes, complete piping systems
• Surface: oiled, painted, galvanized, epoxy coated
• Packaging: strapped, wooden cases, plastic caps
• Documents: MTC (EN 10204 3.1/3.2), third-party reports
9) Our Advantages
• Full material coverage: carbon, stainless, duplex, HDPE, UPVC, Cu-Ni, titanium
• Tailored for different media: raw water, wastewater, desalination, dosing
• Proven project experience: municipal, industrial, seawater desalination
• Quality assurance: strict QC + international certifications
Dimensions & Applications of Steel Materials for Water Treatment Plants
1. Carbon Structural Steel
• Dimensions:
• Plates: 8 – 80 mm thick; width 1500 – 3500 mm; length 6 – 18 m
• Sections: H200 – H800; Angles 50 × 50 – 300 × 300 mm
• Applications:
Tanks, clarifiers, scraper bridges, aeration structures, plant frames → require heavy-duty coatings.
2. Stainless Steel (304/316L/2205)
• Dimensions:
• Thin plates: 1 – 6 mm; width 1000 – 2000 mm; length 2 – 6 m
• Medium plates: 8 – 40 mm; width 1500 – 2500 mm; length 6 – 12 m
• Pipes: OD 15 – 600 mm; WT 1.5 – 25 mm; length 6 m, 12 m
• Applications:
Fine screens, UV disinfection channels, chemical dosing lines, sludge dewatering equipment → resist chloride and acidic sludge corrosion.
3. Ductile Cast Iron
• Dimensions:
• Pipes: DN80 – DN3000; WT 6 – 40 mm; length 6 m
• Fittings/Flanges: DN80 – DN2000; WT 10 – 60 mm
• Applications:
Main intake/discharge pipelines, large water mains, pressure pipelines → cement mortar lined for strength and seismic resistance.
4. Carbon Steel Pipes (Lined/Coated)
• Dimensions:
• OD ½” – 1200 mm (DN15 – DN1200); WT 3 – 30 mm; length 6 m, 12 m
• Applications:
High-pressure process lines, water/effluent transfer → require cement mortar or epoxy lining to prevent corrosion.
5. Special Alloys & Duplex Steel
• Dimensions:
• Duplex SS pipes: OD 15 – 600 mm; WT 2 – 25 mm; length 6 m, 12 m
• Cu-Ni pipes: OD 20 – 300 mm; WT 2 – 12 mm
• Titanium pipes: OD 15 – 200 mm; WT 1 – 10 mm
• Applications:
Seawater desalination, cooling water systems, chloride-rich environments → Duplex 2205/2507, Cu-Ni, Titanium.
6. Lined Steel Pipes
• Dimensions:
• Base pipe: DN15 – DN600 carbon steel
• Liner: PTFE, PVDF, PE, glass flake
• Liner thickness: 2 – 6 mm
• Applications:
Strong acid/alkali pipelines, dosing & disinfection systems, chemical transport.
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