Orifice Plate Assembly
Description
The Orifice Plate is a differential pressure device suitable to measure the flow rate in a closed conduit (it is an affordable device for general applications).
Main Reference code: ISO 5167/ASME MFC-3M; ASME PTC 19.5
As per Customer’s requirements / Main material Reference: ASTM-ASME Code
Type of Elements:
- Square Edge Orifice / Quadrant Orifice / Conical Entrance Orifice / Segmental orifice
Type of Pressure – Taps and Relevant Calculation:
- Flange Taps
- Corner Taps
- Radius Taps
- Pipe Taps
Type Of Construction:
- Flange Taps: with pressure taps on flanges or on carrier ring
- Corner Taps: with pressure taps on flanges, or on annular chambers, or on a monolithic late
- Radius / Pipe Taps: pressure taps shall be welded on pipe (in this case the assembly shall be supplied complete with the relevant spool pipe)
Type of Place Connections:
All / Main Connections: RF-RJ
Type of Flanges:
WN-SW-LJ-THD-SO according to International Standards (ANSI/ASME/UNI/DIN/API)
Other Options:
Single Chamber Orifice Plate Assembly: is a special kind of construction with a system that allows an easy removal of the plate from the assembly
Dual Chamber Orifice Plate Assembly: is a special kind of construction with a system that allows an easy removal of the plate from the assembly under pressure (with the line still in operation)
Calibration
Performances
- Accuracy (referred to the discharge coefficient): as per ISO Code
- Rangeability: 1÷4.5
- Repeatability: +/- 0.1%
- Max PPL 50÷70% of full scale differential pressure
- Straight Lengths Requirements: as per ISO 5167
Notes
- Flow Meters can be manufactured according to Customer specifications
- Flow Meter can be supplied complete with all relevant accessories (valves / manifold / condensing pot / transmitter / fitting / tubing)
TYPICAL SUPPLY CONFIGURATION:
Orifice Plate only
Orifice Plate Assembly
Meter Run Assembly (up to 2”)
Complete Upstream/ Downstream Spool Orifice Assembly (with Flow Conditioner, if required) for 2” and above