AWWA C207 ASTM A105 Hubbed Slip On Flange Large diameter SO

Product Data

Product Introduction

AWWA C207 is a standard for steel flanges and blind flanges issued by the American Water Works Association (AWWA). This standard specifies requirements for the size, material, pressure rating, nominal diameter, and flange surface shape of steel flanges and blind plates.
AWWA C207 is not an international standard, but an American national standard (ANSI/AWWA C207). However, many countries and regions have adopted the AWWA C207 standard or its variants as their local standard for steel flanges and blind flanges. For example, Canada, Australia, New Zealand, Mexico, and some Middle Eastern countries all use the AWWA C207 standard or its variants.

The flat welding flange with a neck in the AWWA C207 standard is a steel flange connection, also known as a flange ring, which has a circular flange face and a cylindrical neck. This type of flange is usually used to connect pipelines, valves, pumps, and other equipment in hydraulic systems, water pipelines, and other liquid conveying systems.

Size and pressure rating:
According to the AWWA C207 standard, the nominal diameter range of neck flat welding flanges is from 3 inches to 144 inches, and the pressure rating range is from 150 pounds per square inch to 2500 pounds per square inch. The parameters such as neck diameter and thickness, flange face thickness, number and diameter of bolt holes, and type and thickness of sealing gaskets for flat welding flanges with necks are also specified in the standard.
But in actual production, due to equipment issues and export transportation restrictions, the actual production size is approximately 3 inches to 72 inches, which is DN100 to DN1800.

Installation:
The installation of slip on flange usually requires connecting the flange surface with bolts and nuts at the end of the pipeline, and sealing with gaskets to ensure tight and water tight pipeline connections. This connection method has the advantages of convenient connection, high reliability, and strong disassembly, and is widely used in various pipeline systems.

Comparison

Neck flat welding flange and plate flat welding flange are two commonly used steel flange connectors, which are slightly different in structure and usage. The following is a comparison between them:

Structural form: The neck flat welding flange has a cylindrical neck, while the plate type flat welding flange does not have a neck and only consists of a flat flange and flange gasket.

Scope of use: Necked flat welding flanges are usually used to connect pipelines, valves, pumps, and other equipment in hydraulic systems, water pipelines, and other liquid conveying systems, while plate type flat welding flanges are usually used to connect smaller pipelines and equipment.

Pressure bearing: Due to the thicker neck and flange surface of the neck flat welding flange, it can usually withstand higher pressure levels ranging from 150 pounds per square inch to 2500 pounds per square inch. Plate type flat welding flanges can usually only withstand lower pressures, with a pressure rating range typically below 150 pounds per square inch.

Installation method: Necked flat welding flanges usually require the use of bolts and nuts to connect them to the end of the pipeline, while plate type flat welding flanges usually use flange gaskets and bolts to connect them to the end of the pipeline. Both connection methods require strict control of connection torque and tightness.

In summary, neck flat welding flanges and plate flat welding flanges have different applications in different pipeline systems and equipment. The selection of suitable flange connectors needs to be determined based on the specific requirements of the pipeline system and equipment.