In AWWA C207-07, Class E hub flanges are a specific type of flange designed for use in water supply systems. The American Water Works Association (AWWA) has established standards for steel pipe flanges used in waterworks systems, and Class E hub flanges are part of this standard.
Class E hub flanges are designed for applications with higher operating pressures compared to Class D flanges. These flanges are typically used in water treatment plants, wastewater facilities, and municipal water supply networks where the pressure requirements are more stringent.
In AWWA C207-07, Class E hub flanges are classified based on their pressure ratings and are manufactured to meet specific design requirements. The standard specifies various dimensions such as flange diameter, bolt hole diameter, bolt circle diameter, hub dimensions, facing dimensions, and thickness specifications for Class E flanges.
Class E hub flanges are commonly fabricated from materials like carbon steel or stainless steel to ensure durability and corrosion resistance in water applications. The raised hub in the center of the flange provides additional strength and support when connecting to pipes or valves.
The specifications outlined in AWWA C207-07 Table 4 for Class E hub flanges ensure that the flanges meet the stringent requirements of waterworks applications and provide a reliable, leak-free connection in high-pressure water distribution systems.
In summary, Class E hub flanges defined in AWWA C207-07 Table 4 play a vital role in water supply systems, offering a secure and dependable connection for piping infrastructure in water treatment facilities, wastewater treatment plants, and municipal water distribution networks.
