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Overview
The AWWA C207 Blind Flange is a steel plate flange manufactured in accordance with AWWA C207, the American Water Works Association standard for steel pipe flanges used in waterworks service.
Blind flanges are designed to close the end of pipelines, valves, or pressure vessels, providing a reliable shut-off solution for testing, maintenance, future expansion, or system isolation.
AWWA C207 blind flanges are widely used in municipal water supply, wastewater treatment, irrigation systems, pumping stations, and large-diameter transmission pipelines.
AWWA C207 blind flanges are flat steel discs without a center bore, drilled with bolt holes to match AWWA flange patterns. They are commonly supplied in carbon steel and can be coated or lined to meet corrosion resistance requirements in potable or non-potable water applications.
Compared with ANSI / ASME flanges, AWWA C207 flanges are optimized for large-diameter, low-to-medium pressure water systems, offering a cost-effective and structurally efficient solution.
| Model Number: | AWWA C207 FLANGE |
| Standard: | AWWA C207 RING/BLIND/HUB FLANGE CLASS B/D/E/F |
| Product name: | BLIND Flange |
| Material: | A105, S235JR |
| Pressure: | CLASS B/D/E/F |
| Technics: | Forged |
| Connection: | Welding |
| Surface Antirust: | Antirust light oil、 Black paint coating、Yellow paint coating or Red paint coating、Galnavized (Hot galvanized or Cold galvanized or Electro Galvanized) |
| Certificate: | ISO, CE, PED, BV, KS |
Flange production process
Factory Showcase
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FAQ
Q1: What is the difference between AWWA C207 and ANSI blind flanges?
AWWA C207 flanges are designed for waterworks applications and large diameters, while ANSI flanges are used mainly for industrial piping with higher pressure ratings and smaller sizes.
Q2: Can AWWA C207 blind flanges be used for potable water?
Yes. With appropriate coatings or linings (such as epoxy or cement mortar), they are suitable for potable water systems.
Q3: Are AWWA C207 blind flanges interchangeable with ASME B16.5 flanges?
No. The bolt circle, thickness, and pressure ratings differ, so direct interchangeability is not recommended.
Q4: What gasket type should be used?
Full-face rubber gaskets (EPDM or NBR) are commonly used for water applications.
Q5: Can you provide customized drilling or coatings?
Yes. Customized bolt drilling, thickness, and surface treatments can be supplied based on project specifications.
