What is the AWWA Class B flange The term "AWWA Class B flange" refers to a specific type of flange that conforms to the standards set by the American Water Works Association (AWWA). AWWA is an organization that establishes guidelines and standards for various aspects of water supply and distribution systems.
In the AWWA flange classification system, Class B flanges are designed for use in low-pressure applications. These flanges are typically used in water and wastewater treatment plants, as well as in plumbing systems where moderate pressures are involved.
AWWA Class B flanges have certain specifications and requirements to ensure their compatibility and performance.
In the AWWA flange classification system, Class B flanges are designed for use in low-pressure applications. These flanges are typically used in water and wastewater treatment plants, as well as in plumbing systems where moderate pressures are involved.
AWWA Class B flanges have certain specifications and requirements to ensure their compatibility and performance.
Some common characteristics of AWWA Class B flanges include:
Pressure Rating: AWWA Class B flanges are suitable for working pressures up to 175 psi (pounds per square inch).
Flange Face: These flanges usually have a flat face design, which means the sealing surface is flat and does not have raised features.
Bolt Holes: Class B flanges have a specific bolt hole pattern that corresponds to the flange size and pressure rating. The number and size of bolt holes may vary based on the flange dimensions.
Material: AWWA Class B flanges are typically made from cast iron, which provides sufficient strength and durability for low-pressure applications.
It's important to note that AWWA flange classifications may vary depending on the specific edition of the AWWA standards.
The dimensions of AWWA Class B flanges can vary depending on the specific size and pressure rating. Flange Size: AWWA Class B flanges are available in a range of sizes, typically from 3 inches to 48 inches. The size refers to the nominal pipe size (NPS) of the flange.
Flange Thickness: The thickness of AWWA Class B flanges can vary based on the size and pressure rating. However, as a general guideline, the flange thickness is typically between 0.75 inches to 1.25 inches.
Bolt Circle Diameter: The bolt circle diameter is the diameter of the imaginary circle that passes through the center of the bolt holes. For AWWA Class B flanges, the bolt circle diameter will depend on the flange size. As an example, for a 12-inch AWWA Class B flange, the bolt circle diameter is usually around 15 inches.
Bolt Hole Diameter: AWWA Class B flanges have specific bolt hole diameters corresponding to the flange size. The bolt hole diameter typically ranges from 0.875 inches to 1.25 inches.
Flange Face-to-Face Dimensions: The face-to-face dimensions of AWWA Class B flanges are generally governed by industry standards such as ASME B16.1 for cast iron flanges. These dimensions may vary depending on the flange size but are typically standardized to ensure compatibility with pipe and valve dimensions.
Flange Face: These flanges usually have a flat face design, which means the sealing surface is flat and does not have raised features.
Bolt Holes: Class B flanges have a specific bolt hole pattern that corresponds to the flange size and pressure rating. The number and size of bolt holes may vary based on the flange dimensions.
Material: AWWA Class B flanges are typically made from cast iron, which provides sufficient strength and durability for low-pressure applications.
It's important to note that AWWA flange classifications may vary depending on the specific edition of the AWWA standards.
The dimensions of AWWA Class B flanges can vary depending on the specific size and pressure rating. Flange Size: AWWA Class B flanges are available in a range of sizes, typically from 3 inches to 48 inches. The size refers to the nominal pipe size (NPS) of the flange.
Flange Thickness: The thickness of AWWA Class B flanges can vary based on the size and pressure rating. However, as a general guideline, the flange thickness is typically between 0.75 inches to 1.25 inches.
Bolt Circle Diameter: The bolt circle diameter is the diameter of the imaginary circle that passes through the center of the bolt holes. For AWWA Class B flanges, the bolt circle diameter will depend on the flange size. As an example, for a 12-inch AWWA Class B flange, the bolt circle diameter is usually around 15 inches.
Bolt Hole Diameter: AWWA Class B flanges have specific bolt hole diameters corresponding to the flange size. The bolt hole diameter typically ranges from 0.875 inches to 1.25 inches.
Flange Face-to-Face Dimensions: The face-to-face dimensions of AWWA Class B flanges are generally governed by industry standards such as ASME B16.1 for cast iron flanges. These dimensions may vary depending on the flange size but are typically standardized to ensure compatibility with pipe and valve dimensions.
