Shanxi Xinshunda Flange Manufacturing Co., Ltd. supplies high-precision AWWA Class E flanges engineered for medium-to-high pressure waterworks, municipal water supply, pumping stations, and large-diameter pipeline systems. Fully compliant with AWWA C207, our Class E flanges provide exceptional sealing performance, structural rigidity, and long service life for critical water utility infrastructure projects. With 19 years of forging and machining expertise, we serve 3,800+ clients in over 70 countries worldwide.
Product Description
AWWA Class D flanges are steel ring flanges and blind flanges designed for water utility service per AWWA C207. Pressure ratings are 175 psi for sizes 4″–12″ and 150 psi for sizes 14″ and larger. They feature standard bolt circles compatible with Class 125 (ASME B16.1) and Class 150 drilling, ensuring interchangeability with valves, fittings and steel pipelines for potable water, raw water and non-corrosive fluid systems. Our Class D flanges are precision machined for perfect fit and zero leakage.
Product Feature and Application
Key Features
- High-pressure rating 225 psi for demanding water systems
- Full compliance with AWWA C207 dimensional and tolerance standards
- Heavy-duty structure for improved strength and stability
- Large-diameter range up to 144″ for main transmission pipelines
- Flat Face (FF) design ensures reliable rubber-gasket sealing
- High rigidity and uniform stress distribution
- Available in ring and blind types
- Suitable for potable water, wastewater, and non-hazardous fluids
- Excellent interchangeability with waterworks equipment
Main Applications
- High-pressure municipal water transmission mains
- Pumping stations and booster stations
- Water treatment plants and reservoir connections
- Wastewater and storm-water pressure pipelines
- Large-diameter industrial water systems
- Civil engineering and water infrastructure projects
- Critical pipeline maintenance and pressure testing
Product Parameter
| Standard | AWWA C207 Class E |
| Pressure rating | 225 psi |
| Nominal diameter | 4″ – 144″ (DN100 – DN3600) |
| Type | Steel Ring Flange, Blind Flange |
| Face type | Flat Face (FF) |
| Surface roughness | Ra 1.6–3.2 μm (125–250 µin) |
| Materials |
Carbon steel: A105, A181, high strength carbon steel plate Stainless steel: F304, F316 (customizable) |
| Working temperature | −10 °C – 120 °C |
| Certification | EN 10204 3.1 Material Test Certificate, Mill Test Report |
| Compatibility | Matches waterworks valves, fittings, and steel pipelines |
Production Details
Each AWWA Class E flange is manufactured under strict quality control:
- Raw material inspection with mill certification and spectral analysis
- Precision forging, rolling, or plate cutting per AWWA C207
- CNC machining for accurate dimensions, bolt holes, and facing
- 100% dimensional inspection using calibrated gauges and CMM
- Visual inspection for surface defects and finish quality
- Hydrostatic testing to verify pressure integrity and safety
- Anti-corrosion treatment: anti-rust oil, epoxy, FBE, or zinc coating
- Permanent marking: size, class, material, standard, heat number, batch
Production Display
Our ISO 9001-certified manufacturing base is equipped with large-scale forging presses, heavy-duty CNC machining centers, professional coating lines, and full-featured testing laboratories. Full process traceability from raw material to finished goods. Third-party inspection by SGS, BV, TÜV or customer-authorized agencies is available upon request.
Packaging & Transportation
- Surface treatment: Anti-corrosion oil, epoxy coating or FBE
- Packaging: Protective wrapping, export wooden crates, steel pallets
- Labeling: Size, class, material, standard, batch, heat number
- Documents: Commercial invoice, packing list, certificate of origin, material test report
- Transportation: Sea, land and bulk logistics for large-diameter products
- Global delivery to over 70 countries with project-based solutions
After-sales Service
We provide full-life cycle technical support for AWWA Class B flanges:
- Professional consultation on selection, installation and gasket matching
- Custom drilling, facing and coating per project requirements
- Timely response to after-sales inquiries and quality claims
- On-site technical support and installation guidance
- Long-term stable supply and inventory for large projects
Why Choose Shanxi Xinshunda?
- 19 years of professional flange manufacturing experience
- Full compliance with AWWA C207 and international standards
- Complete large-diameter range 4″–144″ with fast customization
- Strict quality control and full testing documentation
- Direct factory pricing with stable lead times
- Multilingual service and global project logistics support
Contact us today for product catalogs, quotations or customized solutions for your AWWA Class B flange waterworks projects.
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