1Protection Status
classified on −850 mV instant-OFF · AMPP SP0169
Fully Protected
73.9% of 2,491 surveyed
1,842
Partially Protected
17.3% — some test points fail
431
Unprotected
8.8% — all readings fail
218
Not Yet Surveyed
no valid reading in 15 months
570
Protection State
Classified on −850 mV instant-OFF vs Cu/CuSO₄ (AMPP SP0169).
Are we winning? — 12-month trend
+6.1% fully protected YoY2Inspection Plan vs Actual
intervals per 49 CFR 192.465Annual Inspection Plan vs Actual
FY 2026 · 77.9% completeCompliance Clock
Test posts — ≤ 15 months
94%
Rectifiers — ≤ 2 months
61%
CIPS coverage of pipeline km
72%
Intervals per 49 CFR 192.465 — test stations annually (≤ 15 months); rectifiers 6×/year (≤ 2 months).
3Evidence — readings & system health
what puts each structure in its bucketPotential Distribution — instant-OFF
criterion −850 mVCriteria & System Health
| −850 mV instant-OFF | 1,842 pass | 74% |
| −850 mV ON potential | 2,106 pass | 85% |
| 100 mV polarisation | 1,961 pass | 79% |
| Rectifiers energised | 132 of 141 | 9 down |
| Anode beds depleted | < 20% life | 14 |
| DCVG coating defects | 287 indications | 31 severe |
| Interference / stray current | sites identified | 19 |
4Corrective Actions
immediate · short-term · long-termCorrective Actions — closing the loop to Fully Protected
251 open23
Immediate unprotected + severe defect88
Short-term within this inspection cycle140
Long-term capex / next budget cycle| Structure | Type | Instant-OFF | State | Root cause | Corrective action | Horizon |
|---|---|---|---|---|---|---|
| MPCL-SGPC-GRUB-WHS1 | Well casing | −612 mV | Unprotected | Rectifier R-14 failed | Replace rectifier transformer unit | Immediate |
| PL-06″ SGPC–TIPU KP 12.4 | Pipeline | −698 mV | Unprotected | DCVG severe holiday, 34% IR | Excavate & recoat, then re-survey | Immediate |
| TK-2201 Crude Storage | Tank base | −806 mV | Partial | Anode bed 17% remaining | Install supplementary deep anode bed | Short-term |
| PL-10″ MARI–DAHARKI KP 38.1 | Pipeline | −824 mV | Partial | Stray current from HT crossing | Install drainage bond & monitor | Short-term |
| ZS-Flowline Network (14 km) | Flowline | −831 mV | Partial | Insufficient current density | CP redesign & upgrade groundbed | Long-term |
| PL-08″ SUJAWAL Loop | Pipeline | −744 mV | Unprotected | Coating degradation, 1998 asset | Full recoat programme, phased | Long-term |