The orifice flange is often installed in a closed pipeline, used with orifice meters for measuring the flow rate of liquid, gas and stream through the pipe. N-STEEL orifice plate flange is available in weld neck flange, slip on flange and threaded flange. The combination of two orifice flanges is called orifice flange union. Each flange in this union is designed with two pipe taps for measuring the pressure drop of the flow through an orifice plate.
Standard orifice plate is a metal sheet designed with round tapping. The wall of tapped and the front face of orifice plate is at right angle. When installing the weld neck orifice flange, it has to be ensured that the orifice plate and pipe should be concentric.
Size of Orifice Flange
American series: CLASS 150, CLASS 300, CLASS 400, CLASS 600, CLASS 900, CLASS 1500 and CLASS 2500
Types of Flange Face
American series: Flat Face (FF), Raised Face (RF), Tongue Face (T), Groove Face (G), Female Face (F), Male Face (M) and Ring Joints Face (RJ)
Materials of Orifice Flange
Carbon steel: A105
Alloy steel: A182 F 1-F 2-F 5-F 9-F 10-F 91-F 92-F 122-F 911-F 11-F 12-F 21-F 22
Stainless steel: A182 304-304H-304L-304N-304LN, 316-316H-316L-316N-316LN, 321-321H, 347-347H
Low temperature steel: A522 A707 Grade L 1-L 2-L 3-L 4-L 5-L 6-L 7-L 8
High performance steel: A694 F 42-F 46-F 48-F 50-F 52-F 56-F 60-F 65-F 70
Standards of Orifice Flange
Die forging and Machining
Electrical power, petroleum, natural gas, chemical, shipbuilding, heating, papermaking and metallurgy