HYDRAULIC CALIBRATION
Hydraulic Calibration is carried out by Positive Displacement Provers.
The operating principle is comparison of volumetric flow registered
by the flowmeter under test and the corresponding volume displaced
by an elastometer sphere displaced through the calibrated section of the
Prover loop, duly corrected for the operating temperature and pressure
in the loop and the flowmeter under test.
500 Mm Bi-directional Positive Displacement Prover
The Prover loop consists of a precision pre-calibrated section, sphere detectors at the
beginning and end of the calibrated section, hydraulically operated sphere launchers and
receivers and a 4-way valve for reversing the flow through the loop.
The 500 mm Prover is a Bi-Directional Positive Displacement Prover, designed and operated according to API 2531/ MOPMS
The proving system consists of a Pump house, Metering runs and the Prover loop.
The pumping station consists of 5 centrifugal pumps with a total power of 250 KW and a capacity of 3200 M3/Hr.
The metering section consists of 2 parallel metering runs designed for small and large flowmeters respectively. The run includes flow conditioners, sliding joints, block and bleed valves etc.
The metering runs and Prover loop are connected in series. During each calibration
volume registered by the flowmeter is compared with the calibrated volume of the Prover
barrel, represented by the volume swept by the sphere while passing through the
calibrated section. The entry and exit of the sphere from the calibrated section is
signaled by the detectors.
Supplementary Transfer Loop
A supplementary transfer loop
is available on the 500mm prover.
This supplementary loop is in
accordance with API 2534 and
. This Prover can handle flows up to
has a flow capacity
120 M3/Hr.
3200 M3/Hr.
100 mm UNI-DIRECTIONAL POSITIVE DISPLACEMENT PROVER
- The 100mm Uni-Directional Prover works on the same principle as 500mm prover.
- This Prover can handle flows up to has a flow capacity of 120 M3/Hr.
- The Provers has a certified repeatability of 0.0045%.
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