Awwa C207 Class D Slip On Flange is commonly used in waterworks, slurry, waste water, plant piping or other light duty applications. Generally, the required pressure for the Awwa C207 Class B Blind Flange is less than 300 psi. Pressure ratings for Awwa C207 Flange Material can range from the Class B flange, which stands rated at 86 psi to Class F flanges, both rated at 300 psi.

http://www.longmenforging.com/