Comparative Analysis AWWA C207 vs. C228 Flanges Choosing the Right Fit for Your Application

1. Comparative Analysis: AWWA C207 vs. C228 Flanges - Choosing the Right Fit for Your Application Flanges are critical components, serving as vital connectors in piping systems, facilitating assembly and disassembly for maintenance or expansion. That’s why choosing the best products for specific needs is paramount. Two prominent standards are C207 and C228, defined by the American Water Works Association (AWWA). Both standards ensure robust and reliable connections, but they vary in their specifications, intended applications, and inherent benefits. Engineers and project managers should understand this point to make informed decisions and choose the right flanges. Understanding The Basics: What Are AWWA Flanges? AWWA standards are developed and maintained by the American Water Works Association. These standards provide guidelines and specifications for various materials, products, and processes used in the water and wastewater industries. AWWA flanges are specially manufactured to suit strict requirements regarding dimensions, pressure ratings, materials, and testing procedures. It ensures interoperability and reliability within water infrastructure systems. Cast iron is a commonly used material for these flanges. This material ensures strength, durability, and resistance to corrosion in many water-related applications. AWWA C207 Flanges AWWA C207, Steel Pipe Flanges are widely used for Waterworks Service. The C207 standard includes both steel and cast iron flanges. Specifically, it covers cast iron flanges in pressure classes B, D, E, and F. These pressure classes dictate the maximum allowable working pressure for which a flange is designed. Specifications Material These flanges are available in high-grade carbon steel and stainless steel, with options for galvanized, painted, or custom finishes to maximize corrosion resistance and durability. Pressure Classes Slip-on, blind, and ring-type flanges across all AWWA C207 classes (B, D, E, F), with pressure ratings up to 300 psi and sizes from 4” to 144” to suit any waterworks application. Dimensions The AWWA C207 flange is manufactured in varying sizes, ranging from 4 inches to 144 inches, or 100 mm through 3600 mm. In terms of safety, AWWA recommends that C207 flanges be welded to steel pipes. These dimensions vary based on the nominal pipe size and pressure class. Facing Common facing types include flat faces and raised faces.

2. Applications C207 flanges are commonly used in various waterworks applications, including municipal water distribution and treatment facilities, wastewater and stormwater management systems, industrial process piping and slurry transport, and any project requiring reliable, long-lasting waterworks connections. Their availability in various pressure classes makes them suitable for different pressure requirements within these systems. Benefits AWWA Flanges of C207 They are available in different pressure classes, allowing for selection based on specific system pressure requirements and providing flexibility in design. C207 flanges offer a more economical solution, especially applications in lower-pressure They exhibit good corrosion resistance in many water environments AWWA C228 Flanges The AWWA C228 is a specific range of flange systems. It refers to ring-type slip-on flanges and blind flanges made out of stainless steel. It is different from the best AWWA C207 standard, which is made out of high-carbon steel. Specifications Material AWWA C228 specifies that flanges should be made from stainless steel materials that meet specific chemical and mechanical properties, ensuring corrosion resistance and durability in water service environments. Pressure Classes The AWWA C228 has varying pressure ratings depending on the flange class. The Class SB has a pressure rating of 86 psi, which is the least out of the four classes. In increasing order, Class SD has a pressure rating of 150 psi, Class SE has a rating of 275 psi, and Class SF has a rating of 300 psi and upwards. Dimensions AWWA C228 provides detailed dimensions and tolerances for flanges, including flange face dimensions, bolt-hole spacing, and flange thickness. These dimensions are critical for ensuring proper fit and compatibility with other components in the system. Facing The raised face is the most common facing type for C228 flanges, aligning with their higher-pressure applications where a more concentrated seal is often required. Applications These flanges are used to connect pipes, valves, and other equipment in water distribution systems.

3. Benefits of AWWA C228 Flanges They offer higher tensile and yield strength, withstanding greater pressures. They are more resistant to fracture and impact loads. Their design for higher-pressure classes makes them a reliable choice for demanding applications. Better resistance to thermal and mechanical stresses Choosing the Right Flange: Key Considerations Operating Pressure Look for the maximum operating pressure of the system. The choice of flanges depends on the pressure requirements. If they are within the lower ranges, C207 flanges might be suitable and more economical. For higher pressures, C228 flanges are the preferred choice due to their higher pressure ratings and material strength. Mechanical and Durability Strength The piping system is subjected to major external loads, vibrations, or potential impacts that may benefit from the higher strength of C228 flanges. Corrosion Environment While both offer good corrosion resistance in many water applications, you should consider the specific water chemistry and environmental conditions. Budget Constraints Cost is always a consideration. Set your budget and consult with professionals to get the best deal when choosing the right flanges. Project Specifications and Standards Project specifications often dictate the specific AWWA standard and pressure class to be used. That’s why follow these requirements to ensure compliance and interoperability within the overall system. Long-Term Reliability and Maintenance Make sure about the long-term reliability and reduced maintenance of flanges in demanding applications. Conclusion Choosing between AWWA C207 and C228 flanges directly impacts the performance, safety, and longevity of water infrastructure systems. Consider the above-mentioned factors and make informed decisions that ensure the right fit for their specific application. Conduct thorough engineering analysis and follow the industry standards guide. Sumitec offers the highest quality forged products at affordable prices. It provides customers with quick responses to requests for quotations. Visit www.sumitec.com for more information.

4. CONTACT US CONTACT US Address: Sumitec Int'l Inc. PO Box 1232, Illinois, Bolingbrook, 60440, USA Phone: 1-877-837-9618 Email: sales@sumitec.com Web:https://www.sumitec.com/products/flanges/awwa-c207/