| General Details |
| 1. | Pipeline Name (meaningful to industry) | Halyard Flowline |
| 2. | Total Length of Pipeline (km) | 17.290 |
| 3. | Start point Description | Halyard-2 Christmas Tree Connector |
| 4. | ‘Start Point of Pipeline Coordinates (GDAA94) a) Northing: b) Easting: | Zone 50 283 147 mN 7 720 608 mE |
| 5. | End Point Description | East Spar Manifold |
| 6. | ‘End’ Point of Pipeline Coordinate (GDA94) a) Northing: b) Easting: | Zone 50 7 707 290.800 mN 290 101.200 mE |
| 7. | Substance to be Conveyed: | Wet Gas and Condensate |
| 8. | Characteristics of Substance to be Conveyed; a) Gas Composition: | | Methane (C1) | 87.24 (mol %) | | Ethane (C2) | 4.98 (mol %) | | Propane (C3) | 1.92 (mol %) | | Butane (C4) | 0.87 (mol %) | | Pentane (C5) | 0.42 (mol %) | | Hexane (C6) | 0.26 (mol %) | | Heptane (C7) | 0.15 (mol %) | | Water (H20) | 0.00 (mol %) | | Carbon Dioxide (CO2) | 3.23 (mol %) | | Nitrogen (N2) | 0.93 (mol %) | | Helium (He) | 0.00 (mol %) | | Mercury (Hg) | 0.00 (mol %) | | Hydrogen Sulphide (H2S) | 0.00 (mol %) | |
| Design Details | Halyard -1 10” Flowline | Spar-2 8” Flowline | GES PLEM | GES SCS | Halyard-2 6” Tie-In Spool | GES PLEM – SCS 6” Tie-In Spool |
| 9. | 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 | 0.019 to 0.026 | 0.022 (±0.003) |
| 10. | 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 N.B. Assumes nominal contents density of 114 kg/m3 | Initial Design Capacity (TJ/d) | 99.0 | 95 | 150 | 150 | 95 (90 MMscf/d) | 150 |
| Max Design Capacity (TJ/d) | 250 | 317 | 164 | 164 | 150 (141 MMscf/d) | 150 |
| Design life (years) | 20 | 20 | 20 | 20 | 10 | 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 |
| 13. | Pipe Steel Specification and grade | Pipeline | API 17J Duplex 2101 (7.2 mm thick) | API Spec 17J Duplex 2101 | UNS 31803, 22% Cr Duplex 2205 | UNS 31803, 22% Cr Duplex 2205 | UNS 31803, 22% Cr Duplex 2205 | UNS 31803, 22% Cr Duplex 2205 |
| Riser | N/A | N/A | N/A | N/A | N/A | N/A |
| 14. | Joint type (welded, Mechanical etc) | Mechanical Graylock connectors |
| 15. | Pipe Free Span (m) at Location (KP) | Not Applicable |
| 16. | Yield Strength of Pipe Steel a) Burst Pressure: b) Collapse Pressure c) Failure Pressure | 44 MPag 2.8 MPag 2.9 2848 kN |
| Temperature and Pressure Details | Halyard -1 10” Flowline | Spar-2 8” Flowline | GES PLEM | GES SCS | Halyard-2 6” Tie-In Spool | GES PLEM – SCS 6” Tie-In Spool |
| 17. | Design Temperature | Pipeline (0C) | 110 | 110 | 121 | 121 | 121 | 121 |
| Facilities (0C) | 55 | 55 | 55 | 55 | 55 | 55 |
| 18. | Maximum Operating Temperature | Pipeline (0C) | 98 | 105 | 105 | 105 | 105 | 105 |
| Facilities/stations (0C) | 55 | 55 | 55 | 55 | 55 | 55 |
| 19. | Minimum Operating Temperature | Pipeline (0C) | -20 | -20 | -18 | -18 | -18 | -18 |
| Facilities/stations (0C) | -18 | -20 | -20 | -20 | -20 | -20 |
| 20. | Design Pressure (MPag) | 22.8 | 22.8 | 34.5 | 22.8 | 34.5 | 34.5 |
| 21. | 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 |
| 22. | 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 1100C | 22.8 at 1100C | 22.8 at 1100C | 22.8 at 1100C | 22.8 at 1100C | 22.8 at 1100C |
| 24. | Field Test Pressure a) Proposed Field Test Pressure: b) Minimum Field Test Pressure [ ] x MAOP = [ ] MPag | 22.80 Minimum Field Test Pressure [1.10] x MAOP = 25.08 MPag |
| Pipeline Coatings |
| 25. | Protective External Coating Specification and Thickness (mm): | API 17 J; outer sheath MDPE 8 mm |
| 26. | Weight Coating Design Specification and Thickness (mm): | None |
| 27. | Field Joint Coating: | Not Applicable |
| 28. | Pipe-to-Pipe Joint Coating: | NORSOK M-501 System 7 |
| Control Monitoring |
| 29. | Pressure and Flow Controls Description: | Located on Halyard Well and John Brookes Platform |
| 30. | Safety and Emergency Shutdown Description: | Located on Halyard Well and John Brookes Platform |
| 31. | Telemetry Control: | SCADA or equivalent located on John Brookes Platform |
| 32. | Pigging Facilities a) General Facilities: b) Description of Pigging Facilities: | Not Applicable Not Applicable |
| 33. | Provisions for cathodic protection of the pipeline: | Sacrificial Al-Zn-In Anodes at flowline end fittings |
| 34. | Cathodic Potential Monitoring: | Not Applicable |
| 35. | Cathodic Protection Test Posts: | Not Applicable |
| Valves & Inline Facilities |
| 36. | Fittings, Valves and Flanges specifications a) Fittings: b) Valves: c) Flanges: d) Halyard-2 Spool: | ASME B16.5; ASME VIII; DNV OS F101 API 6D; DNV OS F101 ASME B16.5; ASME VII; DNV OS F101 ASME B31.8 |
| 37. | Mainline Valves a) Number of: b) Type: c) Location (at KP): d) Details of Mainline Valves: | 0 |
| 38. | Location of future Off-take Tees (at KP): | None |
| 39. | Number of Pipeline Inlet Facilities: | 0 |
| 40. | Pipeline Inlet Facilities Description: | Not Applicable |
| 41. | Number of Pipeline Outlet Facilities: | 0 |
| 42. | Pipeline Outlet Facilities Description: | Not Applicable |
| 43. | Compressor Stations (if applicable) a) Number of: b) Location (at KP)|: | 0 |
| 44. | Other Inline Facilities: | None |
| Crossings & Pipeline Stabilisation |
| 45. | Location of the crossing: | Not Applicable |
| 46. | Pipeline Crossing Type: | Not Applicable |
| 47. | Crossings Design Standard: | Not Applicable |
| 48. | Minimum Earth Cover or Other Means of Stabilisation: | None |
| 49. | Anchoring Details: | Not Applicable |
| Pipeline Management |
| 50. | Environmental Design Criteria Description: | 100 year cyclonic criteria |
| 51. | Marine Growth Allowance (mm): | None |
| 52. | Risk Management Description: | DNV OS F101 |
| PLEM-ES Manifold Tie-in Spool (Rigid Pipe) |
| 53. | Pipe Outside Diameter (mm) | 355.6 mm |
| 54. | Pipe Wall Thickness (mm) | 19.05 mm |
| 55. | Pipe Steel Grade and Specification: | Duplex Stainless Steel AA 928 UNS31803 |
| 56. | Pipe Length (m): | 15 |
| 57. | Design Pressure (MPag): | 22.8 |
| 58. | Design Temperature (0C): | 55 |
| 59. | Design Code: | ASME B 31.8 |
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