COMMONWEALTH OF AUSTRALIA
Section 226
Offshore Petroleum and Greenhouse Gas Storage Act 2006
VARIATION OF PIPELINE LICENCE WA-21-PL
(HALYARD FLOWLINE)
I, GRAEME ALBERT WATERS, the National Offshore Petroleum Titles Administrator, on behalf of the Commonwealth–Western Australia Offshore Petroleum Joint Authority hereby vary Pipeline Licence WA-21-PL as set out below.
- “Authorised Route” on page 2 of 16 of the title instrument is amended as follows:
“Refer to plan attached as Annexure A and table of coordinates attached as Annexure B”
- The “Conditions of Licence” on pages 6, 7, and 8 of 16 are varied by deleting the text on pages 6, 7, and 8 of 16 in order to remove the conditions.
3. Annexure A is varied by deleting the text on page 9 of 16 and the map on page 10 of 16 and replacing it with the following text and the map at Attachment 1:
“WA-21-PL Greater East Spar system of pipes pipeline layout”.
4. Annexure B is varied by deleting the text on page 11 of 16 and replacing it with the following text and tables:
The route of the Greater East Spar system of pipes is described in the table hereunder, commencing at the Halyard-1 Christmas Tree and terminating at the western tie-in flange on the East Spar Manifold. Coordinates are based on Geodetic Datum of Australia (GDA94).
Main Halyard Flowline System Co-Ordinates | ||||
| Feature Name | KP* | Easting (m) | Northing (m) |
1. | Halyard-1 Christmas Tree (start) | 0.00 | 283 157 | 7 720 608 |
2. | Greater East Spar PLEM | 0.02 | 283 157 | 7 720 584 |
3. | Greater East Spar Subsea Cooling Skid | 0.05 | 283 171 | 7 720 557 |
4. | Halyard 10” Flowline KP0.0 | 0.06 | 283 175 | 7 720 553 |
5. | Halyard 10” Flowline KP1.0 | 1.00 | 283 612 | 7 719 875 |
6. | Halyard 10” Flowline KP2.0 | 2.00 | 284 204 | 7 719 160 |
7. | Halyard 10” Flowline KP3.0 | 3.00 | 284 361 | 7 718 445 |
8. | Halyard 10” Flowline KP4.0 | 4.00 | 284 811 | 7 717 553 |
9. | Halyard 10” Flowline KP5.0 | 5.00 | 285 263 | 7 716 662 |
10. | Halyard 10” Flowline KP6.0 | 6.00 | 285 715 | 7 715 771 |
11. | Halyard 10” Flowline KP7.0 | 7.00 | 286 086 | 7 714 869 |
12. | Halyard 10” Flowline KP8.0 | 8.00 | 286 535 | 7 713 976 |
13. | Halyard 10” Flowline KP9.0 | 9.00 | 286 985 | 7 713 084 |
14. | Halyard 10” Flowline KP10.0 | 10.00 | 287 434 | 7 712 191 |
15. | Halyard 10” Flowline KP11.0 | 11.00 | 287 881 | 7 711 297 |
16. | Halyard 10” Flowline KP12.0 | 12.00 | 288 330 | 7 710 405 |
17. | Halyard 10” Flowline KP13.0 | 13.00 | 288 778 | 7 709 512 |
18. | Halyard 10” Flowline KP14.0 | 14.00 | 289 226 | 7 708 619 |
19. | Halyard 10” Flowline KP15.0 | 15.00 | 289 674 | 7 707 729 |
20. | Halyard 10” Flowline KP15.6 | 15.59 | 290 088 | 7 707 280 |
21. | East Spar PLEM | 15.60 | 290 091 | 7 707 279 |
22. | East Spar Manifold western flange | 15.61 | 290 101 | 7 707 291 |
Table 1. Route of Main Halyard Flowline (* Kilometre Point)
Spar-2 Tie-in 8” Flowline Co-Ordinates | |||
| Feature Name | Easting (m) | Northing (m) |
1. | Spar-2 Christmas Tree (start) | 281 791 | 7 719 735 |
2. | Spar-2 8” Flowline KP1.0 | 282 605 | 7 720 276 |
3. | Spar-2 8” Flowline KP1.68 (end) (GES PLEM) | 283 154 | 7 720 585 |
Table 2. Route of Spar-2 Tie-in
5. Annexure C “Basis of Design” on page 12 of 16 is varied by inserting after Item 1 the following:
Total Length of Pipeline (km): 17.290
6. Items 8, 9, 11, 12 and 14 of Annexure C “Basis of Design” on page 13 of 16 are varied by deleting the text and replacing it with:
DESIGN DETAILS | Halyard-1 10” Flowline | Spar-2 8” Flowline | GES PLEM | GES SCS | Halyard-1 6” Tie-In Spool | GES PLEM -SCS 6” Tie-In Spool | ||
8. | Pipe Dimensions | Outside Diameter (mm) | 328.9 | 268.1 | 168.3 | 168.3 | 168.3 | 168.3 |
Inside Diameter (mm) | 254 | 203.2 | 139.7 | 146.3 | 131.8 | 131.8 | ||
Length of Pipeline (km) | 15.554 | 1.679 | 0.05 | 0.94 | 0.022 (±0.003) | 0.022 (±0.003) | ||
9. | Nominal Wall Thickness | Standard Wall (mm) | 37.3 | 32.5 | 14.3 | 11.0 | 18.3 | 18.3 |
Heavy Wall (mm) | 37.5 | N/A | N/A | N/A | N/A | N/A | ||
11. | Design | Initial Design Capacity (TJ/d) | 99.0 | 95 | 150 | 150 | 95 | 150 |
Maximum Design Capacity (TJ/d) | 250 | 317 | 164 | 164 | 150 | 150 | ||
Design Life (Years) | 20 | 20 | 20 | 20 | 20 | 20 | ||
Erosional Velocity (m/s) | 50 | 40 | 40 | 40 | 40 | 40 | ||
12. | Pipeline Corrosion Allowance | Internal (mm) | Nil | Nil | Nil | Nil | Nil | Nil |
External (mm) | Nil | Nil | Nil | Nil | Nil | Nil | ||
14. | Pipe Steel Specification and Grade | Pipeline | API 17J Duplex 2101 (7.2 mm thick) | API Spec 17J Duplex 2101 | UNS 31803, | UNS 31803, | UNS 31803, | UNS 31803, |
Riser | N/A | N/A | N/A | N/A | N/A | N/A | ||
7. Items 16, 17, 18, 19, 20, 21, and 23 of Annexure C “Basis of Design” on pages 13 and 14 of 16 are varied by deleting the text and replacing it with:
TEMPERATURE AND PRESSURE DETAILS | Halyard-1 10” Flowline | Spar-2 8” Flowline | GES PLEM | GES SCS | Halyard-1 6” Tie-In Spool | GES PLEM -SCS 6” Tie-In Spool | ||
16. | Design Temperature | Pipeline (°C) | 110 | 110 | 121 | 121 | 121 | 121 |
Facilities (°C) | 55 | 55 | 55 | 55 | 55 | 55 | ||
17. | Maximum Operating Temperature | Pipeline (°C) | 98 | 105 | 105 | 105 | 105 | 105 |
Facilities/Stations (°C) | 55 | 55 | 55 | 55 | 55 | 55 | ||
18. | Minimum Operating Temperature | Pipeline (°C) | -20 | -20 | -18 | -18 | -18 | -18 |
Facilities/Stations (°C) | -18 | -20 | -20 | -20 | -20 | -20 | ||
19. | Design Pressure (MPag) | 22.8 | 22.8 | 34.5 | 22.8 | 34.5 | 34.5 | |
20. | Inlet Pressure Range (MPag) | 6.0 to 21.2 | 6.0 to 21.5 | 6.0 to 21.5 | 6.0 to 21.5 | 6.0 to 21.5 | 6.0 to 21.5 | |
21. | Outlet Pressure Range (MPag) | 6.0 to 21.2 | 6.0 to 21.5 | 6.0 to 21.5 | 6.0 to 21.5 | 6.0 to 21.5 | 6.0 to 21.5 | |
23. | Maximum Allowable Operating Pressure (MPag) | 22.8 at 110°C | 22.8 at 110°C | 22.8 at 110°C | 22.8 at 110°C | 22.8 at 110°C | 22.8 at 110°C | |
8. The rest of Annexure C Basis of Design remains as stated in the licence instrument dated 20 January 2011.
The variation takes effect on the day on which a notice of the variation is published in the Commonwealth Government Gazette.
Made under the Offshore Petroleum and Greenhouse Gas Storage Act 2006
of the Commonwealth of Australia
GRAEME ALBERT WATERS
TITLES ADMINISTRATOR
ON BEHALF OF THE COMMONWEALTH–WESTERN AUSTRALIA
OFFSHORE PETROLEUM JOINT AUTHORITY
Attachment 1