AWWA C207 Flanges Suppliers
Steel Hub & Ring Flange
AWWA C207 Standard Flanges: Dimensions | Specifications | Material Grade | Standards | About AWWA C207 Standard | All Product Types
AWWA C207 flanges are specially designed steel flanges used in waterworks and wastewater systems, developed under the American Water Works Association (AWWA) standards. These flanges are widely used in low-pressure piping systems for water distribution, treatment plants, irrigation, and industrial waterworks. Unlike ANSI/ASME flanges, AWWA C207 flanges are non-standardized in size and thickness but are engineered to perform in corrosive and low-pressure environments, making them highly durable and cost-effective for utility applications.
At Nutech, we manufacture and export a full range of AWWA C207 steel flanges, including Hub-Type Flanges and Ring-Type Flanges in Classes B, D, E, and F, precisely fabricated as per the latest edition of the AWWA C207 standard. These flanges are available in sizes from 4″ to 144″ (DN100 to DN3600) and are made using carbon steel plates or forgings, ideal for bolting to steel pipes, valves, or fittings in above-ground or buried water pipeline systems.
All flanges are subjected to rigorous inspection and dimensional checks to meet AWWA's tolerance standards and hydrostatic test conditions. We offer corrosion-resistant finishes like hot-dip galvanizing, fusion-bonded epoxy (FBE), and black paint as per project specifications. Our export packaging meets global standards, ensuring safe delivery to countries across the USA, Middle East, Africa, Southeast Asia, and Europe.
Our AWWA C207 flange solutions offer:
- Compatibility with ANSI B16.1 class bolt patterns
- Flat face construction for easy gasket sealing
- Pressure ratings from 86 psi (Class B) to 300 psi (Class F)
- Ideal for water mains, slurry lines, fire protection networks, and municipal infrastructure
We also supply custom-drilled bolt patterns, oversize bore flanges, and flanges for ductile iron and steel pipe systems — all backed by our ISO 9001 manufacturing processes.
AWWA C207 Flanges – Dimensions, Pressure Ratings, Sizes, and Uses in Water, Sewage & Industrial Piping Systems.
For complete technical details, including dimensions, pressure rating classes, weight charts, sizes, tolerances, and material specifications of our AWWA C207 Class B Flanges, please download the full Catalog PDF below.
Leading Manufacturer & Exporter of AWWA C207 Class B, D, E & F Flanges for Waterworks and Utility Projects Worldwide.
Technical Specifications of AWWA C207 Class D Flange
| Specification | Details |
|---|---|
| Standard | AWWA C207 – Steel Flanges for Waterworks Service (Sizes 4″ to 144″) |
| Flange Types | Blind Flanges, Slip-On Flanges, Threaded Flanges, Lap Joint Flanges |
| Pressure Classes | Class B (86 psi), Class D (175 psi), Class E (275 psi), Class F (300 psi) |
| Size Range | 4″ to 144″ Nominal Pipe Size (NPS) |
| Face Types | Flat Face (FF), Raised Face (optional), Custom Machined Faces |
| Drilling Standards | ANSI B16.1 Class 125 & Class 250, AWWA-specific bolt patterns |
| Coating Options | Black Paint, Hot-Dip Galvanized, Red Oxide Primer, Epoxy Coated (on request) |
| Surface Finish | Stock Finish (3.2–6.3 μm), Smooth Face, Custom Machining Available |
| Testing & Inspection | Hydro Test (on request), Visual & Dimensional Inspection, MTC as per EN 10204 |
| Certification | EN 10204 3.1 / 3.2, ISO 9001, NACE MR0175 (if applicable) |
| Applications | Water Treatment Plants, Sewage Systems, Irrigation, Hydroelectric Dams, Industrial Water Pipelines |
| Origin | Made in India (by Nutech Overseas) |
| Export Network | USA, Europe, and Middle East |
Complete Material Grade Chart - AWWA C207 Class E Flanges
| Material Category | AWWA C207 Class F Flange Grades |
|---|---|
| Stainless Steel AWWA C207 Flange | ASTM A182 F304 / F304L / F304H, F316 / F316L / F316Ti, F310, F309S, F317 / F317L, F321 / F321H, F347 / F347H, F904L, ASTM A351 CF3 / CF3M / CF8 / CF8M / CF8C, DIN 1.4301, 1.4306, 1.4307, 1.4311, 1.4401, 1.4404, 1.4408, 1.4409, 1.4541, 1.4571, 1.4550, 1.4435, 1.4539 |
| Duplex Steel AWWA C207 Flange | ASTM A182 F51 / F52 / F53 / F54 / F55 / F57 / F59 / F60 / F61, UNS S31803 / S32205 |
| Super Duplex Steel AWWA C207 Flange | ASTM A182 F53 / F55 / F57 / F59 / F60 / F61, UNS S32750 / S32760 |
| Carbon Steel AWWA C207 Flange | ASTM A105 / A105N, ASTM A350 LF2, ASTM A694 F52 / F56 / F60 / F65 / F70 / F80, ASTM A216 WCB, DIN 1.0460 / 1.0402 / 1.0619, Die Steel, Mild Steel |
| Alloy Steel AWWA C207 Flange | ASTM A182 F5 / F9 / F11 / F12 / F22 / F91, AISI 4130 / 4140 |
| Nickel Alloy AWWA C207 Flange | Nickel 200 / 201, ASTM B564 |
| Monel AWWA C207 Flange | Monel 400 (UNS N04400), Monel K500 (UNS N05500), ASTM B564 |
| Inconel AWWA C207 Flange | Inconel 600 / 601 / 625 / 690 / 718 / 783 / X750, ASTM B564 |
| Incoloy AWWA C207 Flange | Incoloy 800 / 800H / 800HT (UNS N08800), Incoloy 825 (UNS N08825), Incoloy 925, ASTM B564 |
| Hastelloy AWWA C207 Flange | Hastelloy C276 (UNS N10276), C22 (UNS N06022), C4, C2000, B2, B3, X, ASTM B564 |
| Alloy 20 AWWA C207 Flange | Alloy 20 / 20Cb-3, Carpenter® 20, ASTM B462 |
| 254 SMO AWWA C207 Flange | SMO 254 / 6Mo, UNS S31254, DIN 1.4547, ASTM A182 |
| Copper Nickel AWWA C207 Flange | Copper Nickel 90/10 (C70600), 70/30 (C71500), UNS C71640, ASTM B61 / B62 / B151 / B152 |
| Copper AWWA C207 Flange | TP1, TP2, T1, T2, C10100–C12300, C14200–C17200, C21000–C71520, including C10930, C11000, C11400, C12000, C12200, C26000, C28000, C33000, C44300, C70600, etc. |
| Brass AWWA C207 Flange | Grades 3602, 2604, H59, H62, etc. |
| Aluminium AWWA C207 Flange | Aluminium Grades 5052, 6061, 6063, 2017, 7075, etc. |
| Titanium AWWA C207 Flange | ASTM B381 Gr.1 / Gr.2 / Gr.4 / Gr.5 / Gr.7, UNS R50250 / R50400 / R50550 / R50700 / R52400 / R53400 / R56320 / R56400 |
| Other Special Grades | Al6XN, Tin Bronze, Aluminium Bronze, Lead Bronze, Nimonic 75 / 80A / 90 |
International Flange Standards We Manufacture & Supply
Selecting AWWA C207 flanges for large-diameter pipelines involves specific considerations that can directly impact performance, durability, and compliance. Common challenges include:
- Pressure Class Matching:
Ensuring the selected flange class (Class B, D, E, or F) aligns with the operating pressure and flow requirements.
- Gasket Compatibility:
Choosing the right gasket type and face finish for leak-free sealing in water systems.
- Material Selection:
While carbon steel is common, corrosion-prone environments may require coatings or alternative materials.
- Weight vs. Strength Optimization:
Large-diameter flanges can be heavy; selecting ring flanges over hub flanges can reduce weight without compromising structural integrity.
- Bolt Hole Alignment:
Maintaining proper bolt hole alignment for field installations is critical, especially in remote locations.
- Compliance with Local Water Authorities:
Many municipalities require strict adherence to AWWA standards, including documentation, marking, and testing.
These pressure classes are vital in selecting the correct flange for different temperature, media, and application environments, especially in marine and shipbuilding industries where JIS standards are commonly used.
AWWA C207 flanges are classified based on pressure-handling capabilities and application requirements:
- Class B: Designed for low-pressure applications up to 86 psi, typically used in ductile iron pipelines.
- Class D: Suitable for higher pressure systems up to 175 psi, commonly applied in water treatment and distribution networks.
- Class E: Used in high-pressure waterworks up to 275 psi, with thicker dimensions for added strength.
- Class F: Heavy-duty flange for severe pressure applications, used where Class E is insufficient.
These classes are defined by thickness, bolt circle diameter, and number of bolt holes, ensuring compatibility with various piping systems and pressure needs.
Yes, AWWA C207 flanges are widely used in wastewater treatment plants and desalination systems due to:
- Corrosion resistance: When manufactured in stainless steel or with anti-rust coatings.
- Large diameter compatibility: Ideal for pipelines from 4″ up to 144″.
- Moderate pressure handling: Suitable for Class B to F pressure requirements typically seen in such facilities.
- Ease of installation: Ring and blind flanges simplify field assembly and maintenance.
These factors make AWWA flanges a practical choice for both inland and coastal water treatment infrastructure.
AWWA C207 and ASME B16.5 serve different purposes and industries:
| Feature | AWWA C207 Flanges | ASME B16.5 Flanges |
|---|---|---|
| Use Case | Municipal water systems, ductile iron pipelines | High-pressure industrial piping systems |
| Pressure Ratings | Up to 300 psi (Class F) | Up to 2500 psi |
| Available Sizes | 4″ to 144″ | ½″ to 24″ |
| Flange Types | Ring Flange, Blind Flange, Slip-On Flange | Weld Neck, Blind, Threaded, Socket Weld, Slip-On, Lap Joint |
| Design Basis | Steel hubless flanges (no raised face) | Steel flanges with hubs and raised faces |
| Primary Applications | Waterworks, irrigation, wastewater, stormwater systems | Oil & Gas, Petrochemical, Power Generation, Chemical Plants |
AWWA flanges are often lighter and more cost-effective for large diameter, lower-pressure systems, whereas ASME B16.5 is engineered for rigorous industrial environments.
Nutech Overseas proudly exports AWWA C207 flanges to a global network of clients, particularly in regions with active waterworks and infrastructure projects. Our export destinations include:
- USA and Canada – For large-scale municipal water supply systems
- Saudi Arabia, UAE, and Oman – For desalination and infrastructure
- South Africa and Egypt – Used in rural water pipelines
- Chile and Peru – In mining-related water conveyance
- Australia and New Zealand – For irrigation and wastewater applications
Every flange is shipped with complete dimensional and quality certifications, ensuring compliance with the AWWA C207 standard and project-specific documentation needs.
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