Carbon Steel / Stainless Steel AWWA C207 Class E Steel Ring Flange 275PSI 100MM To 3600MM for Waterworks Services

AWWA C207 Standard Steel Ring Flanges Class E(275 PSI) for Waterwork Services

Introduction:

Our company, Shaanxi Peter International Trade Co., Ltd is a reputable manufacturer of AWWA C207 Steel Ring Flanges, known for our commitment to producing flanges of the highest quality. With more than two decades of experience in the industry, we have built a strong reputation for delivering products that meet the rigorous standards set by the AWWA C207 standard. We are proud to offer an extensive range of flanges and take great pride in ensuring that our manufacturing processes adhere to the highest standards of excellence.

Description of AWWA C207 Steel Ring Flanges:

AWWA C207 is a standard in the United States of America that defines the requirements for steel pipe flanges used in waterworks service. These flanges are available in sizes ranging from 4" to 144" (100 mm to 3600 mm). AWWA stands for "American Water Works Association". The origin of AWWA C207 dates back to 1942 when a proposal was put forward to establish standards for slip-on steel-ring flanges for welding to steel water pipes. This standard was necessary because the lowest pressure ratings for steel flanges at that time were those with cold-water pressure ratings of 275 psi (1896 KPa). These ratings were far higher than those typically required for water service, which had a primary pressure rating of 150 psi / 1034 KPa.

AWWA C207 flanges are designed to connect steel pipes, fittings, valves, or other equipment in water utility services. The standard specifies two main types of flanges: (1) ring-type slip-on flanges, which are also called ring flanges or plate flanges; and (2) blind flanges. Both ring and blind flanges are steel flanges that do not have a hub. 

AWWA C207 flanges are classified into four classes based on their working pressure limits: Class B (86 psi), Class D (175-150 psi), Class E (275 psi), and Class F (300 psi). These pressure limits apply to customary conditions and temperatures in water utility services.

AWWA C207 Steel Ring Flanges Dimensions:

The Material Requirement of AWWA C207 Steel Ring Flanges:

The material requirements of AWWA C207 steel ring flanges are as follows:

1. The flanges shall be made from materials that comply with the requirements of the Safe Drinking Water Act.

2. The specified minimum tensile strength shall be 50,000 psi (345 MPa).

3. The specified minimum yield strength shall be 32,000 psi (221 MPa).

4. The elongation, measured with a 2" [50 mm] gauge length, shall be a minimum of 18%, or with an 8" [200 mm] gauge length, a minimum of 14%.

5. The maximum carbon content shall be 0.35%.

6. The maximum phosphorus content shall be 0.04%.

7. The maximum sulfur content shall be 0.05%.

In addition to these material requirements, the bolts and studs used with AWWA C207 steel ring flanges shall be made to ASTM A193 B7 specifications, and the heavy hex nuts shall be made to either ASTM A194 2H or ASTM A563 specifications for sizes 1" or smaller. Washers, if used, shall meet the requirements of ASTM F436. The flange gasket may be made from rubber, compressed fiber, or PTFE, and may be in a full-face or ring type configuration.

The Origins of AWWA C207 Steel Ring Flanges:

The history of AWWA C207 dates back to the early 1940s when the American Water Works Association (AWWA) recognized the need for a comprehensive standard for steel pipe flanges used in waterworks service.

In 1942, a proposal was put forward to develop standards for slip-on steel ring flanges that could be welded to steel water pipes. The goal was to establish uniform specifications and guidelines to ensure the safe and reliable installation of flanges in water supply systems.

The initial focus of AWWA C207 was to address the pressure ratings of steel flanges. At that time, the existing pressure ratings for steel flanges were much higher than what was typically required for water service. The proposal aimed to establish appropriate pressure ratings that aligned with the specific needs of waterworks applications.

Over the years, AWWA C207 underwent several revisions and updates to incorporate advancements in materials, manufacturing techniques, and industry practices. These updates aimed to improve the performance, durability, and safety of steel flanges used in waterworks service.

Today, AWWA C207 is widely recognized and adopted as the industry standard for steel pipe flanges in water supply systems. It provides guidance on dimensions, materials, pressure ratings, gasket selection, and other important aspects to ensure the proper functioning and longevity of flange connections.

The ongoing development and refinement of AWWA C207 reflect the commitment of the AWWA and industry experts to continuously improve the standards and practices related to steel flanges in waterworks service.

Applicatons of AWWA C207 Steel Ring Flanges:

AWWA C207 Steel Ring Flanges are commonly used in various waterworks applications, including:

Water Treatment Plants: Steel ring flanges are used to connect pipes and valves in water treatment plants, such as filtration, sedimentation, and disinfection systems.

Pump Stations: Steel ring flanges are used to connect pumps, motors, and other equipment in water pumping stations, including booster stations, distribution pumping stations, and raw water pumping stations.

Transmission and Distribution Lines: Steel ring flanges are used to connect pipelines in water transmission and distribution systems that deliver water to homes, businesses, and other facilities.

Wastewater Treatment: Steel ring flanges are used to connect pipes and valves in wastewater treatment plants, including sewage treatment, sludge handling, and effluent treatment systems.

Industrial Applications: Steel ring flanges are used in industrial applications that require piping systems to transport water or other fluids, including chemical processing plants, power generation facilities, and oil and gas refineries.

AWWA C207 Steel Ring Flanges are ideal for use in applications that require a durable and reliable connection method. They offer excellent resistance to corrosion, high temperatures, and pressure, making them suitable for a wide range of waterworks and industrial applications.