+86 351 8390 369
Water treatment ductile flange adapters are specially designed for use in plants handling harsh chemicals and variable water qualities. Made from corrosion-resistant ductile iron, these adapters ensure tight, leak-free connections that prevent contamination and system failures. Their durability supports continuous plant operations and helps maintain the quality and safety of treated water supplied to communities and industries.
Our Water-Treatment Ductile Flange Adapters are engineered for the demanding environments of municipal and industrial water treatment plants — including potable water systems, filtration trains, chemical dosing skids, pumps, and desalination units. Made from high-quality ductile iron with specialist coatings and certified gaskets, these adapters provide leak-free, durable transitions between plain-end pipe and flanged equipment (valves, pumps, strainers), reducing downtime and maintenance costs.
Corrosive media, frequent chemical dosing, and variable water quality put flange connections under continuous stress. SolidJoints' ductile flange adapters are designed to resist corrosion, handle pressure fluctuations, and maintain tight seals so your plant keeps running and water quality stays uncompromised.
Ductile iron body for high impact strength and long service life.
Chemical-resistant coatings (coal-tar epoxy, organic zinc primer, or optional thermal coatings) for aggressive environments.
Gasket options: EPDM / NBR / Grade-P (selected to resist disinfectants and common water-treatment chemicals).
Pressure ratings available to match ANSI, PN, or AWWA systems — engineered for distribution and process pressures.
Multiple connection options: compatible with DI, PVC, PE, and steel pipelines — with restrained and unrestrained styles for thrust control where required.
Custom sizes & finishes: from small diameters to large mains; available with galvanizing or epoxy coatings for potable or wastewater applications.
Potable water distribution and service connections
Filtration and clarification skids
Chemical dosing and neutralization lines
Pump and valve connections (retrofitting flanged valves to plain-end pipe)
Desalination and industrial process plants
Install with standard flange bolts and torque to manufacturer’s recommendations. For high-thrust locations, use our restrained flange adapter option to prevent joint separation and eliminate separate thrust blocks. Routine inspection of gasket condition and coating integrity is recommended; replacement gaskets are available for scheduled maintenance.
Designed to meet common water-works specifications — including AWWA coupling/flange standards and industry pressure classes. Material certificates and test reports are available on request.
| Item | Options / Notes |
|---|---|
| Body material | Ductile Iron (GJS) |
| Coating | Coal-tar epoxy / Organic zinc primer / Thermal coating (optional) |
| Gasket | EPDM / NBR / Grade-P (disinfectant-resistant) |
| Sizes | DN50 – DN600+ (custom available) |
| Pressure rating | Standard ANSI/PN classes; options up to common industry service levels |
| Connections | Plain end to flange (compatible with DI, PVC, PE, steel) |
| Special options | Restrained version, galvanizing, anchor studs, reducing styles |
Get a quote — sample drawings and lead times available within 24 hours.
Q: Are these adapters suitable for potable water?
A: Yes — with certified potable coatings and EPDM/Grade-P gaskets, these adapters are specified for potable systems. Material certificates are provided with purchase.
Q: Do you offer restrained versions for thrust control?
A: Yes — restrained flange adapters are available to prevent joint separation at high pressure or thrust points.
Q: What standards do they meet?
A: We design to common standards such as AWWA coupling/flange practices and industry pressure classes.
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