Introduction of orifice flanges
Orifice flanges are widely used in orifice meters to measure the flow rate of liquids and gases in the respective pipeline.Two orifice flanges are called orifice flange union.Each flange has a pipe tap for measuring the pressure drop of the flow through the orifice plate.This makes the separate orifice plate carrier or tapping on the pipe wall unnecessary.The orifice plate is not installed with the flange, and its size is determined according to the process requirements.One/two jack screws are used to separate the flange for replacing the orifice plate.
A set orifice flanges,where a plate is mounted and a jack screw is machined.This jack screw is used to facilitate separating the flanges for inspection or replacement of the orifice plate and gaskets.
Orifice flanges covers all standard size and ranges,the nominal standard is ANSI B16.36.In choosing the types of orifice flange,the considerations affecting the choice of weld neck,slip on and threaded form.The pressure classes can be 300#,600#,900#,1500# and 2500#,orifice flanges are not available in 150# sizes because the thickness of 150# flanges are not enough to allow for drilling pressure taps.The common orifice flanges materials are carbon steel,stainless steel and alloy steel.Orifice flanges generally come with either raised faces(RF) or ring type joint(RTJ) facings.They are,for all intensive purposes,the same as weld neck and slip on flanges with extra machining.
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