Orifice Flange

Orifice Flange

These are widely used in conjunction with orifice meters for measuring the rate of flow of liquids and gases. They are basically the same as standard welding neck and slip-on flanges except for the provision of radial, tapped holes in the flange ring for meter connections and additional bolts to act as jack screws to facilitate separating the flanges for inspection or replacement of the orifice plate. In choosing the type of orifice flange, the considerations affecting the choice of welding neck and slip-on standard flanges apply with equal force.


Description of our products:

  • NPS: 1/2” to 24”
  • Pressure Rating: Class 300, Class 600, Class 900, Class 1,500, Class 2,500
  • Connection Face: RF / RTJ
  • Material:
    • Carbon steel: ASMT A105/N, ASTM A350 LF2 CL1, ASTM A694 F52/F60/F65/F70
    • Stainless steel: ASTM A182 F304/F304L/F310/F316/F316L/F317/F321
    • Alloy steel: ASTM A182 F11/F12/F22
  • Packing: plywood case or plywood pallet
  • Coating: Oil, black paint, yellow paint, hot dip galvanized, electrolytic zinc and epoxy resin coatings


Standards, Dimensions & Weight:

ASME/ANSI B16.36 Class 300 Orifice Flange

ASME/ANSI B16.36 Class 600 Orifice Flange

ASME/ANSI B16.36 Class 900 Orifice Flange

ASME/ANSI B16.36 Class 1500 Orifice Flange

ASME/ANSI B16.36 Class 2500 Orifice Flange