What class flange is AWWA C207?

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What Class Flange is AWWA C207?

Flanges play a crucial role in various industries, serving as connectors for pipes, valves, and other equipment. They ensure a secure and leak-proof connection between different sections of a piping system. The American Water Works Association (AWWA) has established several standards to ensure the quality and reliability of flanges used in waterworks applications. One such standard is AWWA C207, which specifies the class flange that should be used in different pressure ratings. In this article, we will explore what class flange AWWA C207 is and its significance in the industry.

Understanding AWWA C207.

AWWA C207 is a standard developed by the American Water Works Association for steel pipe flanges. It provides specifications for different types of flanges, such as blind flanges, reducing flanges, and slip-on flanges, to be used in waterworks applications. The standard classifies flanges into different pressure classes, namely Class B, Class D, Class E, Class F, and Class H.

Class B Flanges.

Class B flanges are designed for water service ranging from 86 psi to 175 psi. These flanges are lightweight and have bolt hole patterns that match those specified in ANSI B16.1. Class B flanges are usually used in low-pressure applications, such as irrigation systems or water distribution networks. They are commonly made from gray iron or ductile iron.

Class D Flanges.

Class D flanges are suitable for higher pressures, ranging from 175 psi to 275 psi. They have bolt hole patterns that match those specified in ANSI B16.1. Class D flanges are typically made from either gray iron or ductile iron. These flanges are commonly used in water transmission and distribution pipelines, as well as in pump stations.

Class E Flanges.

Class E flanges are designed for even higher pressures, ranging from 275 psi to 500 psi. Like Class B and Class D flanges, Class E flanges have bolt hole patterns that match those specified in ANSI B16.1. However, Class E flanges are made from forged carbon steel. They are widely used in water treatment plants, reservoirs, and power plants.

Class F Flanges.

Class F flanges are intended for very high-pressure applications, ranging from 500 psi to 860 psi. These flanges are usually made from forged carbon steel. They have bolt hole patterns that match those specified in ANSI B16.1. Class F flanges are commonly used in high-pressure waterworks systems, including pump stations and industrial water supply lines.

Class H Flanges.

Class H flanges are designed for the highest pressure applications, with pressure ratings exceeding 860 psi. These flanges are also made from forged carbon steel and have bolt hole patterns that match those specified in ANSI B16.1. Class H flanges are used in extreme high-pressure waterworks systems or critical applications where maximum strength and integrity are required.

In conclusion, AWWA C207 provides clear classifications for flanges used in waterworks applications. The different class flanges specified by this standard ensure that the suitable flange is chosen based on the specific pressure requirements of a given system. Understanding the class flange requirements is essential to maintaining the integrity and safety of a waterworks system. If you have any further questions or need assistance with selecting the appropriate flange for your application, please do not hesitate to contact us.

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