Solomon Brown (University College London) - Material Considerations in CO2 Pipeline Design: Practical Issues and Ongoing Work - UKCCSRC Cranfield Biannual 21-22 April 2015

1. 1
Materials Considerations in CO2
pipeline design: practical issues and
ongoing work
Dr Solomon Brown, Prof. Mahgerefteh Dr Sergey Martynov
University College London
Dr. Reza Hojjati
ArcelorMittal Global R&D Gent (OCAS N.V.)
UKCCSRC Biannual meeting
21 April 2015, Cranfield

2. Structure
2
1. Background
2. Charpy V-Notch (CVN) Impact Test
3. Drop Weight Tear Test (DWTT)
4. Conclusions

3. Structure
3
1. Background
2. Charpy V-Notch (CVN) Impact Test
3. Drop Weight Tear Test (DWTT)
4. Conclusions

4. 4
Introduction

5. 5
Fracture propagation

6. 0
100
200
300
-200 -150 -100 -50 0 50
Temperature [°C]
6
Lower Shelf
Brittle Fracture
[M. Bilio et al. 2009]
Upper Shelf
Ductile Fracture
[M. Bilio et al. 2009]
Energy [J]
API X70 grade
The need for material properties…

7. 7
 Instrumented 45 m
pipeline
 Pre-cut hole
diameter: ~5 mm
 6 external
thermocouples
After
the test
CO2Quest release experiments

8. 8
Maximum Principal Stress [MPa]
Mathematical modelling - fluid-structure model
Exposed to: 1 atm

9. Structure
9
1. Background
2. Charpy V-Notch (CVN) Impact Test
3. Drop Weight Tear Test (DWTT)
4. Conclusions and ongoing work

10. Scale
Hammer
Specimen
Anvil
10
10 mm
A
A
45
2 mm
Section A-A
Radius= 0.25 mm
Hammer
Capacity=750 J
Hammer weight=50 kg
Charpy V-Notch (CVN) Impact Test

11. 11
Absorbed Energy [J]
X80-WT 13 mm
Temperature [oc]
X70HIC-WT 14 mm
X65HIC-WT 12.5 mm
CVN results

12. 11
0
5
10
15
0 0.2 0.4 0.6
0
5
0
5
0
0 10 20 30 40
Displacement [mm]
orce [kN] Force [kN]
Displacement [mm]
-70 C
-196 C
Room temperature
23 C
12
[-75,130]
0
100
200
300
-200 -150 -100 -50 0
Temperature [ C]
Absorbed energy [J]
Transition
temperature
Brittle Ductile
CVN results

13. Structure
1
1. Background
2. Charpy V-Notch (CVN) Impact Test
3. Drop Weight Tear Test (DWTT)
4. Conclusions and ongoing work

14. 14
DWTT Set-up
T= 20 oc T= -65 oc
Drop Weight Tear Test (DWTT)

15. Ductile Shear Area (DA) [%]
Temperature [oc]
15
Temperature [oc]
Absorbed Energy [kJ]
DWTT results

16. 16
DBTT [oc]
CVN-Energy
X80
X65HIC
X70HIC
DWTT-DA DWTT-Energy
DBTTCVN < DBTTDWTT
X70MS (HIC) offers the best combination of strength, low
temperature toughness and resistance to (accidental) H2S exposure
CVN vs DWTT

17. Structure
1
1. Background
2. Charpy V-Notch (CVN) Impact Test
3. Drop Weight Tear Test (DWTT)
4. Conclusions and ongoing work

18. 18
• The material properties of X65, X70 and X80 grades of steel have
been studied;
• X70HIC was found to have the lowest ductile-to-brittle-transition-
temperature;
• material information is being incorporated into a rigorous coupled
fluid-structure model.
Conclusion

19. 19
Contact details
Solomon Brown
University College London
Gower Street, London,
United Kingdom
Tel: +44-2076793809
www.co2quest.eu
Thank you
Questions

20. 20
Acknowledgements and Disclaimer
The research leading to the results described in this
presentation has received funding from the European
Union 7th Framework Programme FP7-ENERGY-2012-1-
2STAGE under grant agreement number 309102.
The presentation reflects only the authors’ views and the
European Union is not liable for any use that may be
made of the information contained therein.