CAST IRON FLANGED PIPE FITTINGS WORKING PRESSURES

Cast iron flanged pipe fittings working pressures according to ASME B16.1. Pressure ratings for various temperatures are given for Class 125 and Class 250 flanges fittings. Ratings are independentof the fluid and the maximum nonshock pressures at the given temperatures.

Notes:

• When used for liquid service, given ratings for class 250 in NPS 14 and larger are applicable to flanges only not fittings
• Pressure is in lb/sq in gage.
• NPS - Nominal pipe size
• The material for flanged fittings are Class B according to ASTM A 126.
• 353°F (max.) to reflect the temperature of saturated steam at 125 psig.
• 406°F (max.) to reflect the temperature of saturated steam at 250 psig.

Related Topics:

• Cast Iron Flanged Pipe Fittings Working Pressures Temperatures
• Pipe Flanges Dimensions Chart
  • Cast Iron Flanges
    • Class 25
    • Class 125
    • Class 250
  • Class 150
• Cast Iron Flanges Fittings Dimensions Chart
  • Class 125
• Dimensions of Nonmetallic Flat Gaskets
  • Class 25 Cast Iron Flanges
  • Class 125 Cast Iron Flanges
  • Class 250 Cast Iron Flanges
  • Class 150 Flanges
  • Class 300, 400, 600 and 900 Flanges
• Dimensions of Metallic Gaskets
  • Type R Ring Type Joint (RTJ) Metallic Gasket Dimensions
  • Type RX Ring Type Joint (RTJ) Metallic Gasket Dimensions
  • Type BX Ring Type Joint (RTJ) Metallic Gasket Dimensions

Reference:

• ASME B16.1-1998, Cast Iron Pipe Flanges and Flanged Fittings - Classes 25, 125, and 250