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