AWWA C207 Class E Hub Flange – High-Pressure Waterworks Flanges
The AWWA C207 Class E Hub Flange is a heavy-duty flange built for high-pressure water service systems. Unlike ring-type flanges, this design includes a raised hub to reinforce strength and improve stress distribution, especially under high-pressure loads. Designed according to the American Water Works Association’s C207 standard, these flanges are commonly drilled to match ANSI B16.5 Class 300 bolt patterns and are used in steel piping systems where working pressures reach up to 400 psi. Werner Flanges Inc. manufactures precision-engineered Class E hub flanges that ensure excellent durability and performance.
Class E Hub Flanges are widely used in high-pressure municipal and industrial water pipelines, wastewater treatment facilities, fire protection systems, pump stations, and process plants. Their robust construction makes them suitable for both buried and exposed applications where pressure containment and long service life are essential.
Werner Flanges Inc. stocks a broad range of Class E Hub Flanges in sizes ranging from 4 inches to 60 inches. Standard configurations include flat face flanges drilled per ANSI B16.5, with coating options such as red oxide primer, black paint, and hot-dip galvanizing. We also accommodate special requests for custom drilling, exotic materials, and OEM branding for international clients.
Backed by years of manufacturing expertise, Werner Flanges Inc. is a trusted supplier to water utility contractors, EPC firms, and infrastructure developers globally. Our flanges meet all dimensional and material standards and include MTCs with every batch. We provide fast response times, export-ready logistics, and cost-effective solutions for bulk and custom flange requirements.
AWWA C207 Class E Hub Flange – High-Pressure Waterworks Flanges Technical Specifications
| Specification | Details |
|---|---|
| Standard | AWWA C207 – Class E |
| Flange Types | Hub Flange |
| Pressure Ratings | 275–400 psi |
| Size Range | 4” to 60” |
| Facing Types | Flat Face (FF) |
| Manufacturing Process | Forged / Machined |
| Testing & Certification | MTC 3.1, Hydrostatic Testing (on request) |
Material Specifications for AWWA C207 Class E Hub Flange – High-Pressure Waterworks Flanges
| Type of Materials | Common Specifications / Customization Available on Request |
|---|---|
| Duplex Steel | ASTM/ASME A182 F51, F60, F61, UNS S31803, UNS S32205 |
| Super Duplex Steel | ASTM/ASME A182 F53, F55, UNS S32750, UNS S32760, F44 (6Mo) |
| Stainless Steel | ASTM/ASME A182 F304, F304L, F316, F316L, F310, F317L, F321, F347 |
| Carbon Steel | ASTM A105, A350 LF1, LF2, LF3, A266 Class 1/2, A694 F42 to F70, A765 Gr. II |
| Alloy Steel | ASTM/ASME A182 F1, F5, F9, F11, F12, F22 |
| Non-Ferrous Alloys | Titanium, Brass, Admiralty Brass, Copper Nickel, Nickel Alloys, Hastelloy |
| Titanium | ASTM/ASME B381 Gr.1, Gr.2, Gr.5, Gr.7, Gr.12, Gr.16 |
| Copper Nickel | ASTM B151 UNS C70600 (Cu-Ni 90/10), C71500 (Cu-Ni 70/30) |
| Brass, Al-Brass | ASTM B152 UNS C26000, C27200, C28000; ASTM B111 for Al-Brass |
| Nickel Alloys | ASTM B160, B161, B564 – UNS N02200, N02201, N04400, N08800, N08825, N06600, N06601, N06625, Monel K500 |
| Alloy 20 | ASTM B462 UNS N08020 |
| Hastelloy | ASTM B564 UNS N10276 (Hastelloy C276), N06022 (Hastelloy C22) |
| Cladded Materials | ASTM B898, B265, B424 or custom explosion/clad bonding using dissimilar metals |
| Titanium-Steel, Nickel-Steel, Titanium-Copper, Stainless Steel-Carbon Steel, Bimetallic/Trimetallic Combinations |
Types of AWWA C207 Class E Hub Flange – High-Pressure Waterworks Flanges
- AWWA Class E Hub-Type Flange
- High-Pressure Hubbed Flange
- ANSI 300 Equivalent Hub Flange
- AWWA Steel Hub Flange
- C207 Class E Waterworks Flange
- Carbon Steel Hub Flange
- Welded Neck Water Line Flange
Industries and Applications of AWWA C207 Class E Hub Flange – High-Pressure Waterworks Flanges
| Industry | Application |
|---|---|
| Oil & Gas Industry | Used extensively in upstream, midstream, and downstream operations for high-pressure piping and processing systems requiring robust sealing solutions. |
| Petrochemical & Chemical Processing | Ideal for handling corrosive chemicals and high-temperature pipelines in refining and chemical manufacturing processes. |
| Power Generation | Installed in thermal, nuclear, and hydroelectric power plants for critical pressure applications and steam systems. |
| Water Treatment & Desalination | Used in high-pressure water distribution, desalination, and wastewater treatment pipelines ensuring durability and leak resistance. |
| Marine & Offshore Industry | Suitable for seawater piping systems, ballast systems, and pressure vessels in marine engineering and offshore platforms. |
| Pharmaceutical Industry | Ensures sanitary, high-pressure fluid handling in sterile environments and cleanroom process systems. |
| Food & Beverage Industry | Used in hygienic and high-pressure processing lines where corrosion resistance and strength are critical. |
| Mining & Mineral Processing | Supports slurry transport systems and ore processing pipelines in mining operations. |
Frequently Asked Questions (FAQs) about AWWA C207 Class E Hub Flange – High-Pressure Waterworks Flanges
1. What is the difference between a hub flange and a ring flange?
A hub flange includes a tapered neck for better stress distribution and is more suitable for high-pressure applications, unlike flat ring flanges.
2. What pressure is supported by Class E Hub Flanges?
These flanges are rated for 275 to 400 psi, depending on size and installation conditions.
3. Are Class E Hub Flanges compatible with ANSI B16.5?
Yes, they are typically drilled to match ANSI B16.5 Class 300 bolt patterns.
4. What materials are Class E Hub Flanges made from?
Most commonly, they are made from carbon steels like A36 and A105. Other grades are available on request.
5. Do these flanges come coated?
Yes, Werner Flanges Inc. offers various coatings like black paint, red oxide primer, and hot-dip galvanizing.
6. What sizes are available?
Standard sizes range from 4” to 60”, but custom sizes can be manufactured as per project requirements.
7. Is testing documentation provided?
Yes, we provide Mill Test Certificates (MTC 3.1) and optional hydro testing documentation upon request.
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