Channel × AssetStack · Marsden Point Terminal
Wiri pipeline · cathodic protection survey
Whangārei Harbour · Ruakākā · Pacific/Auckland · NZDT (UTC+13 at demo snapshot)
DEMO · Synthetic operating records as at 28 October 2026. Not live telemetry, actual contracts, inspection evidence or operational authority.
12 loaded of 12 · calculations apply to loaded records
6 loaded of 6 · calculations apply to loaded records
Off-potential flags · test points
6
AC screening flags · test points
4
Nearby ILI features to investigate
4
CP potentials and external metal loss · synthetic chainage
- On potential · mV CSE
- Instant-off · mV CSE
- ILI depth · % WT
Lines connect sparse DEMO test points, not a continuous CIPS survey or protected route length. Reference line is an adjustable screening assumption.
| Reading · DEMO | Chainage | Date | On / off mV CSE | AC V | DCVG %IR | Review evidence |
|---|---|---|---|---|---|---|
| DEMO-CI-CP-001-1 | 4.5 km | 2026-10-28 | -1190 / -760 | 7 | 32 | Screening flag · 2 nearby ILI feature(s)DEMO · synthetic Channel scenario at 2026-10-28. Not actual telemetry, survey geometry, inspection evidence or design data. Sparse synthetic test point, not a CIPS survey. CP engineer: verify electrode calibration, synchronised interruption, IR drop, soil resistivity, rectifier logs and AC/DC current density. Repeat accepted measurements after work and retain signed QA. DEMO-CI-ILI-001 · 77% WTDEMO-CI-ILI-002 · 48% WT |
| DEMO-CI-CP-001-2 | 4.6 km | 2026-10-28 | -1175 / -750 | 8 | 32 | Screening flag · 2 nearby ILI feature(s)DEMO · synthetic Channel scenario at 2026-10-28. Not actual telemetry, survey geometry, inspection evidence or design data. Sparse synthetic test point, not a CIPS survey. CP engineer: verify electrode calibration, synchronised interruption, IR drop, soil resistivity, rectifier logs and AC/DC current density. Repeat accepted measurements after work and retain signed QA. DEMO-CI-ILI-001 · 77% WTDEMO-CI-ILI-002 · 48% WT |
| DEMO-CI-CP-002-1 | 4.7 km | 2026-10-28 | -1155 / -980 | 5 | 9 | Review record · 2 nearby ILI feature(s)DEMO · synthetic Channel scenario at 2026-10-28. Not actual telemetry, survey geometry, inspection evidence or design data. Sparse synthetic test point, not a CIPS survey. CP engineer: verify electrode calibration, synchronised interruption, IR drop, soil resistivity, rectifier logs and AC/DC current density. Repeat accepted measurements after work and retain signed QA. DEMO-CI-ILI-001 · 77% WTDEMO-CI-ILI-002 · 48% WT |
| DEMO-CI-CP-002-2 | 4.8 km | 2026-10-28 | -1140 / -970 | 6 | 9 | Review record · 1 nearby ILI feature(s)DEMO · synthetic Channel scenario at 2026-10-28. Not actual telemetry, survey geometry, inspection evidence or design data. Sparse synthetic test point, not a CIPS survey. CP engineer: verify electrode calibration, synchronised interruption, IR drop, soil resistivity, rectifier logs and AC/DC current density. Repeat accepted measurements after work and retain signed QA. DEMO-CI-ILI-002 · 48% WT |
| DEMO-CI-CP-003-1 | 20.2 km | 2026-10-28 | -1120 / -1040 | 4 | 6 | Review record · 1 nearby ILI feature(s)DEMO · synthetic Channel scenario at 2026-10-28. Not actual telemetry, survey geometry, inspection evidence or design data. Sparse synthetic test point, not a CIPS survey. CP engineer: verify electrode calibration, synchronised interruption, IR drop, soil resistivity, rectifier logs and AC/DC current density. Repeat accepted measurements after work and retain signed QA. DEMO-CI-ILI-003 · 35% WT |
| DEMO-CI-CP-003-2 | 20.3 km | 2026-10-28 | -1105 / -1030 | 5 | 6 | Review record · 1 nearby ILI feature(s)DEMO · synthetic Channel scenario at 2026-10-28. Not actual telemetry, survey geometry, inspection evidence or design data. Sparse synthetic test point, not a CIPS survey. CP engineer: verify electrode calibration, synchronised interruption, IR drop, soil resistivity, rectifier logs and AC/DC current density. Repeat accepted measurements after work and retain signed QA. DEMO-CI-ILI-003 · 35% WT |
| DEMO-CI-CP-004-1 | 75 km | 2026-10-28 | -1085 / -790 | 18 | 22 | Screening flag · 1 nearby ILI feature(s)DEMO · synthetic Channel scenario at 2026-10-28. Not actual telemetry, survey geometry, inspection evidence or design data. Sparse synthetic test point, not a CIPS survey. CP engineer: verify electrode calibration, synchronised interruption, IR drop, soil resistivity, rectifier logs and AC/DC current density. Repeat accepted measurements after work and retain signed QA. DEMO-CI-ILI-004 · 58% WT |
| DEMO-CI-CP-004-2 | 75.1 km | 2026-10-28 | -1070 / -780 | 19 | 22 | Screening flag · 1 nearby ILI feature(s)DEMO · synthetic Channel scenario at 2026-10-28. Not actual telemetry, survey geometry, inspection evidence or design data. Sparse synthetic test point, not a CIPS survey. CP engineer: verify electrode calibration, synchronised interruption, IR drop, soil resistivity, rectifier logs and AC/DC current density. Repeat accepted measurements after work and retain signed QA. DEMO-CI-ILI-004 · 58% WT |
| DEMO-CI-CP-005-1 | 142.5 km | 2026-10-28 | -1050 / -810 | 23 | 28 | Screening flag · 1 nearby ILI feature(s)DEMO · synthetic Channel scenario at 2026-10-28. Not actual telemetry, survey geometry, inspection evidence or design data. Sparse synthetic test point, not a CIPS survey. CP engineer: verify electrode calibration, synchronised interruption, IR drop, soil resistivity, rectifier logs and AC/DC current density. Repeat accepted measurements after work and retain signed QA. DEMO-CI-ILI-005 · 68% WT |
| DEMO-CI-CP-005-2 | 142.6 km | 2026-10-28 | -1035 / -800 | 24 | 28 | Screening flag · 1 nearby ILI feature(s)DEMO · synthetic Channel scenario at 2026-10-28. Not actual telemetry, survey geometry, inspection evidence or design data. Sparse synthetic test point, not a CIPS survey. CP engineer: verify electrode calibration, synchronised interruption, IR drop, soil resistivity, rectifier logs and AC/DC current density. Repeat accepted measurements after work and retain signed QA. DEMO-CI-ILI-005 · 68% WT |
| DEMO-CI-CP-006-1 | 168.3 km | 2026-10-28 | -1015 / -990 | 6 | 5 | Review record · 0 nearby ILI feature(s)DEMO · synthetic Channel scenario at 2026-10-28. Not actual telemetry, survey geometry, inspection evidence or design data. Sparse synthetic test point, not a CIPS survey. CP engineer: verify electrode calibration, synchronised interruption, IR drop, soil resistivity, rectifier logs and AC/DC current density. Repeat accepted measurements after work and retain signed QA. |
| DEMO-CI-CP-006-2 | 168.4 km | 2026-10-28 | -1000 / -980 | 7 | 5 | Review record · 0 nearby ILI feature(s)DEMO · synthetic Channel scenario at 2026-10-28. Not actual telemetry, survey geometry, inspection evidence or design data. Sparse synthetic test point, not a CIPS survey. CP engineer: verify electrode calibration, synchronised interruption, IR drop, soil resistivity, rectifier logs and AC/DC current density. Repeat accepted measurements after work and retain signed QA. |
Limits, causation and verification
−850 mV CSE, 15 V AC and 15% DCVG IR are DEMO screening assumptions, not adopted Channel criteria. ISO 15589-1 / AMPP SP0169 selection requires the approved CP basis and environmental conditions; ISO 18086 AC-corrosion assessment needs current density, not voltage alone. Coincidence is ±250 m with ≥30% WT loss; it does not prove active corrosion or a causal connection. No protected kilometre estimate is inferred from sparse points.
Before selecting excavation, the CP engineer must verify electrode calibration, synchronised interruption, IR-drop correction, soil resistivity, rectifier records and AC/DC current density. After rectifier or coating work, repeat accepted CP measurements and retain calibration, readings, coating QA and accountable sign-off.