5 th European Flow
Measurement Workshop 2017
Development of balance
system on crude oil pipelines
in Czech Republic
© MERO ČR, a.s.
European Pipeline System
Czech Republic
DRUZHBA
Total 657 km pipeline
Yearly capacity 9 mil. tons
505 km DRUZHBA
Yearly transported about 4
million tons
172 km IKL
Yearly total transport
7.5 million tons
IKL
TRIESTE
The higher capacity counting with scenario
discontinue pumping from one direction.
IKL (Ingolstadt-Kralupy-Litvínov Pipeline)
TAL (Transalpine Pipeline)
From Trieste thru TAL
Yearly capacity 10 mil. tons
Yearly transported about 3.5
million tons
2
Crude Oil Transport
Old balance system
Balance system MERO ČR, a.s.
3
Crude Oil Transport
New balance system
Balance system MERO ČR, a.s.
4
Crude Oil Transport
The outlet measuring station is situated in front of entrance to refinery.
 2 x Coriolis Flow meter DN150
 2 x Pressure and temperature correction
 Oscillation-type density meter
 Flow Computer Floboss S600
5
Measuring Instrumentation
The main East point in Czech Republic from DRUŽBA pipeline – Measuring
Station Klobouky
 3 x Coriolis Flow meter DN150
 Parallel conection
 3x Pressure correction
 Flow Computer Floboss S600
 Automatic sampler Jiskoot
Ordinary daily flow is 700 tons per hour.
6
Measuring Instrumentation
Advantages and disadvanteges Coriolis Flow meter
Advantages:
+ Universally applicable principle for measuring the flow.
+ Direct measurement of mass flow.
+ The measuring principal is independent of the fluid density and viscosity.
+ Very hight measuring accuracy (typically ±0.1% of reading
±0.05% o.r. (Premium Calib.))
Disadvantages:
− Relatively high initial investment.
− Larger sizes are heavy.
− Losses some pressure at higher flow/velocity.
DN 150 Range for Custody Transfer 21 t/h – 720 t/h
Endress+Hauser
7
Measuring Instrumentation
Why 3 x DN150 instead of smaller amount or with bigger diameter?
Flexible and user friendly maintenance
Ordinary daily flow is 700 tons per hour. We could use just two Flow meters to
ensure accurate and safe measuring. But in case of failure or periodic calibration we
would have to reduce pumping.
When you have three Flow meters, you can take one down and still satisfy
requirements of refineries.
When pumping is more than 600 tons per hour we use 3 flow meters with uniform
divided flow.
When pumping is less than 600 tons per hour we use only two flow meters with
periodically changing suspending one.
8
Measuring Instrumentation
Why 3 x DN150 instead of smaller amount or with bigger diameter?
Flexible and user friendly maintenance
DN 150 – Size 1400x758 mm
Weight 163 kg
Now. Try to imagine DN 250 with 409 kg.
DN 250 – Size 1780x956 mm
Weight 409 kg
9
Measuring Instrumentation
Why 3 x DN150 instead of smaller amount or with bigger diameter?
Accuracy [%]
Better dependence Accuracy in small Flow Rate (start/stop pumping)
0,9
0,8
0,7
0,6
0,5
0,4
0,3
0,2
0,1
0
Range for Custody Transfer
Range
Promass F
Min.
Max.
DN 150
21 t/h
720 t/h
DN 250
90 t/h
2 100 t/h
Measured error ±0.1 %
0
50
100
150
200
250
FlowRate [t/h]
DN 150
300
350
400
DN 250
10
Measuring Instrumentation
Why 3 x DN150 instead of smaller amount or with bigger diameter?
Limit in Accuracy and max. Flow Rate in calibration laboratories.
National and European regulation gives max. limit for accuracy for Custody Transfer
devices 0.2%.
Only few Calibration Laboratories in Europe can reach 400 t/h or more with Expanded
Uncertainty better then 0.015%. (For calibration needs 3 times more accurate device.)
Regulatory body accept +20% above max. calibration point for Custody Transfer. In
case 400 t/h it is 480 t/h which can use.
Without changing regulations or more powerful calibration rig with higher velocity is
impossible use flowmeter in max. range.
11
Measuring Instrumentation
Internal technical regulation defines calibration standards for main measuring station
on border.
calibration specification
Flow [t/h]
Max. deviation
[%]
40
0,1
60
0,1
100
0,05
200
0,05
300
0,05
400
0,05
40
0,1
 4 times more accurate limits as required by
regulations.
 These specifications have big demands on
calibration laboratories.
 Only a few calibration laboratories in
Europe have necessary uncertainty on
their calibration rigs.
12
Measuring Instrumentation
Small piston Prover Syncrotrak
 Inspection each year for main measuring station.
 Calibrate flow meters for custody transfer (except main measuring station).
 Reduce cost for third party calibration.
 The test medium is crude oil not water.
Uncertainty is
better than 0,03%.
Honeywell
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Result of annual balance
The new measuring system significantly improves annual balance and accuracy.
System where use data from input and output measuring stations on crude oil
pipeline is in accordance with customer´s wish. This system satisfying customers
needs.
14
Following developments
 Long time analysis of data obtained from operation of devices.
 Long term stability of devices, influence to accuracy and lifetime.
 Redundant communication and elements of system and using for leak
detection.
 In 2017 new measuring station in Vohburg in Germany. Where we use
Coriolis flow meter DN 250. We count with new calibration rig in Switzerland
from E+H with bigger capacity and higher volume and velocity.
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Following developments
New measuring station in Vohburg in Germany
 2 x Coriolis Flow meter DN 250.
 Accuracy ±0.05% o.r. (Premium Calibration).
 Accuracy of measuring station 0.3% for CT
IKL
TAL
MERO Germany AG
Vohburg
16
Following developments
New measuring station in Vohburg in Germany
TAL
pipeline
Tank farm
17
Thank you for your attention.
More questions…
MERO ČR. a. s.
Veltruská 748
278 01 Kralupy nad Vltavou
Czech Republic
e-mail: [email protected]
www.merocr.eu
MILOSLAV POUSTKA
[email protected]