AWWA C207
AWWA C207
AWWA C207 specifies steel ring flanges primarily for waterworks service. These flanges are widely used in pipelines and water distribution systems, offering reliable performance in various pressure and temperature conditions. Below is an overview of common flange pressure classes, applications, temperature ranges, materials, and flange face types:
Applications
- Water Distribution Systems: Ensures leak-free connections for potable and non-potable water.
- Irrigation Systems: Suitable for agricultural pipelines.
- Industrial Applications: Used in cooling and process water pipelines.
- Fire Protection Systems: Integrated into firewater systems for enhanced safety.
High-Temperature Applications
AWWA C207 flanges are not typically designed for extreme temperatures. However, modifications using heat-resistant materials (e.g., carbon steel with high-temperature coatings) can extend their functionality. Applications include:
- Steam pipelines.
- High-temperature process water systems.
Low-Temperature Applications
For sub-zero or cryogenic applications, materials with higher ductility, such as low-temperature carbon steel, are used to prevent brittleness. These flanges are commonly applied in:
- Cold storage water pipelines.
- Arctic and cold-climate infrastructure.
Materials
- Carbon Steel: Most commonly used for its cost-effectiveness and strength.
- Stainless Steel: Offers enhanced corrosion resistance for aggressive environments.
- Ductile Iron: Utilized for lower-pressure systems.
- Special Alloys: Applied in cases where specific mechanical properties are required.
Flange Face Types
- Flat Face (FF):
- Used when the mating flange is also flat-faced.
- Common in low-pressure systems.
- Raised Face (RF):
- Enhances sealing with a gasket.
- Suitable for higher-pressure applications.
- Ring-Type Joint (RTJ):
- Provides a metal-to-metal seal.
- Ideal for high-pressure, high-temperature systems.
- Tongue and Groove (T&G):
- Prevents gasket blowout.
- Frequently used in specialized applications.
