Vertical metering skid for Custody Transfer measurement of crude oil. Presentation for the 2019 NSFMW manufacturing session.

1. 2500 m3/h CT metering solution on a 3 x 4 m footprint
NSFMW 2019 Manufacturing session
Hilko den Hollander
23 Oct 2019

2. Design requirements
• 2500 m3/h fiscal metering package for crude oil from subsea tank into shuttle
tankers, in compliance with NPD Measurement Regulations, Norsok Standard
I-106 and MID.
• 16” inlet and outlet header
• 4x 33% 8” ultrasonic meter runs with in- and outlet valve, redundant PT,
redundant TT, thermal relief, heat tracing and insulation
• Flow metering skid as vertical hang-off module with 3 x 4 meter footprint
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Initial skid design

3. Vertical Flow metering skid design
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Sketch from rfq specification Assembled flow metering skidSkid design

4. 4
ALTOSONIC 5 - Reynolds number approach
23.10.2019 | 2500 m3/h CT metering solution on a 3 x 4 m footprint - NSFMW 2019 Manufacturing session

5. ABC
7
6
5
4
3
2
1
ABC
7
6
5
4
3
2
1
V7
V6
V5
V3
V1
V4
V2
V1
V2
V3
V4
V5
V6
V7
Lower Reynolds Higher Reynolds
Up to G
ALTOSONIC 5 - Reynolds number approach
Profile recognition
| 2500 m3/h CT metering solution on a 3 x 4 m footprint - NSFMW 2019 Manufacturing session23.10.20195

6. Vertical calibration
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• 7D + flowcon + 5D + Meter
• Height ~ 6 m

7. Calibration procedure
Operational and calibrated Reynolds range
| 2500 m3/h CT metering solution on a 3 x 4 m footprint - NSFMW 2019 Manufacturing session
~1.8 cSt ►
~25 cST ►
~300 cSt ►
Application range
Flow [m3/h] Flow velocity
[m/s]
Viscosity [cSt] Reynolds
Number
Operational range Nondisclosed application details 2.6 - 5.0 *105
Calibration range
Calibration range 120-900 1.1 - 8.0 1.8 - 1.9 1.2 - 8.8 *105
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8. Verification of USM against SVP
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Small volume proverFull configuration SVP installed during calibration

9. API MPMS Chapter 5.8 repeatability and uncertainty
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• Prover volume 0.15 m3
• Flowrates 200, 400, 800 m3/h
• Pass times 2.7, 1.4 and 0.7 s

10. Previous generation sampling rate
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STOPLAUNCH
Time
Flow
Poor repeatability
Red: 1st pass sampling.
Purple: 2nd pass sampling
Previous generation sampling rate

11. Current generation sampling rate
• 250 updates per second
• Floating average technology
• Max pulse frequency 10 kHz
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STOPLAUNCH
Flow
Time
Good repeatability
Red: 1st pass sampling.
Purple: 2nd pass sampling
Latest generation sampling rate

12. Proving ALTOSONIC 5 with SVP
• Proving volume ≥ 1 second, stable process conditions
• 5 runs (3 passes per run) is sufficient to reach ± 0.027%
uncertainty
• Volumes < 1 second might require more runs and/or
passes.
• ALTOSONIC 5 electronics backwards compatible with
previous generation ALTOSONIC V (just upgraded meter
from 1998)
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13. Welding base frame
• NORSOK M-120 materials requirements, additional
customer material requirement on lifting points.
• Stress calculation as per DNV specifications
• All calculations approved by DNV
• Welding and testing per DNV
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14. Transport of uncoated base frame
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• Base frame dimensions 3 x 4 x 13
meter
• Special transport required

15. Coating of base frame
• NORSOK 2 layer coating systems
• NACE level III paint inspection
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16. Welding and coating of piping
• NORSOK piping materials
• Special NORSOK welding materials
• DNV stress calculations and verification
• DNV Witness of hydrotest
• NORSOK 2 layer painting
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17. Production and calibration of flowmeters
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18. Assembly of skid
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19. Small volume prover, prover tank and sampling system
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20. Metering Control Panel
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21. Flow test on water, drying with dry warm air, VCI preservation (NORSOK Z-006)
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22. Flow test details
• Skid and electronics fully operational
• Functional behavior test per NORSOK I-106
• Leak inspection, run switching, flow balancing
• Witnessed by NPD, DNV, Platform owner, Platform
operator, Platform engineering company
• Pressure loss test at 830 m3/h over single stream
• SVP Proving run at 415 m3/h
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23. Loading of svp skid
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24. Load testing of metering skid lifting spreaders
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25. Loading on barge at KROHNE workshop
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26. Lessons learned
• DNV requirements are demanding
• 6MO tubing and fitting material about 4x price of SS316
• Vertical design relatively straightforward
• 1.5 bar max pressure drop on a 16 meter vertical
installation is a bit of a challenge
• Installation on platform scheduled for Nov/Dec 2019
• Questions: oilandgas@krohne.com
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27. Thank you for your attention!