RESTRICTION ORIFICE

Restriction Orifices are used for limiting a flow rate or for creating a certain permanent pressure loss. They find application in distribution lines and in blending operations when different fluids are to be mixed.

TECHNICAL SPECIFICATIONS

Type of construction

Union Type (union screwed or socket welding ends)
Consist of a plate with calibrated bore inserted in an union with screwed or socket-welding ends.

Minimum size: 1" (DN25)
Maximum size: unlimited

Flange Type
Consist of a plate with calibrated bore inserted between couple of line flanges with studs, nuts and jack screws
Minimum size: 1" (DN25)
Maximum size: unlimited

Standard materials
Orifice Plate
Supplied in AISI 316 st. st. as standard. Other materials available upon request
Flanges and Union
In the same material of the line.
Carbon steel, st. st., alloy steel, etc.
Gasketing depend on fluid type.

Restriction orifice calculation
When requested , flow calculations can be made for determining bore diameter according to ISO 5167-2 : 2003, ASME 3M (2004), ANSI 2530/AGA-3/API Ch.14