Ductile Iron Flange Standards

ASME Standards

• ASME B16.1 - Gray Iron Pipe Flanges and Flanged Fittings: Classes 25, 125, and 250

AWWA Standards

• AWWA C110 - Standard for Ductile-Iron and Gray-Iron Fittings
• AWWA C115 - Standard for Flanged Ductile Iron Pipe with Ductile-Iron or Gray-Iron Threaded Flanges