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AWWA C207 Flange Class Selector
Match your waterworks working pressure to the right AWWA C207 ring-flange class (sizes 4 to 144 in).
Operational Parameters
Flange Specification
All AWWA C207 flanges are flat-faced (FF), carbon steel, commonly ASTM A516 Gr.60 or A105. Class B and D share the 150# ASME B16.5 bolt pattern. Stainless waterworks service uses AWWA C228 instead.
