Gas Transmission, Distribution & Pressure Systems
Pipeline & Pressure Integrity Assurance
Repair-aware ILI-to-ILI hierarchical Bayesian corrosion growth forecaster, physics-informed burst pressure ("Days Until Dig"), dig verification unity plots, and statutory pressure-system register. Configurable for AS 2885, 49 CFR 192 / ASME B31.8S, IGEM/TD/1 and EN 1594.
Multi-Layer Pipeline Integrity, Bayesian ILI Growth & Burst-Pressure Visual Command
Click any girth-weld anomaly along the 45 km Habshan–Ruwais alignment strip below to inspect its 360° clock-position wall loss, 3-run Bayesian shrinkage trajectory, Modified B31G / RSTRENG / DNV-RP-F101 burst envelope, and bellhole ultrasonic dig verification.
360° Pipe Cross-Section & Clock Orientation
ILI-GW1040-0530 · GW 1040 (Spread-2 Sabkha Crossing)
ILI-to-ILI Matched Growth Trajectory: Hierarchical Bayes vs. Naive Differencing (ILI-GW1040-0530)
Pools noisy ±10% WT MFL runs with Coal-Tar Enamel / Saline Sabkha Clay cohort priors and projects exact breach of the 80% WT & burst threshold.
- P10–P90 Bayesian Credible Fan (%WT)
- Hierarchical Bayesian Trajectory (%WT)
- Naive 2-Point Differencing (%WT)
- Bellhole AUT Field Verification (%WT)
Physics-Informed Burst-Pressure Failure Envelope (P_fail vs. Defect Length L)
Compares Modified B31G (0.85dL), RSTRENG Effective Area, and DNV-RP-F101 at ILI-GW1040-0530 depth (56% WT) against MAOP (10.2 MPa).
- DNV-RP-F101 (UTS)
- RSTRENG Effective Area
- Modified ASME B31G (0.85dL)
Field-Verified Dig Unity Plot (ILI MFL Call vs. Bellhole Ultrasonic Depth)
Gate 3 Field Verification across 6 ADNOC corridor validation digs (RMSE ±1.17% WT, 100% within ±10% MFL confidence bounds).
- y = x Unity Line
- +10% WT MFL Spec
- -10% WT MFL Spec
- Field Bellhole AUT Verified (%WT)
Repair-Aware ILI-to-ILI Bayesian Corrosion Forecaster & Burst-Pressure Dig Clock
Box-matches anomalies by girth weld, odometer chainage and clock orientation across 2018, 2022 and 2026 MFL runs, detects sleeve/recoat cycle resets, pools noisy ±10% WT MFL calls via Hierarchical Bayes, and couples growth to burst pressure.
Shortest Time to Dig
0 days
ILI-GW1040-0530 (2026-10-13)
Immediate / Scheduled Digs
5 / 0
Target FPR ≥ 1.39×MAOP
Repair Cycle Resets
1
Sleeve/recoat jump isolated from rate
Holdout ILI Run 3 MAE
1.92% WT
vs 2.7% Naive (29% noise reduction)
Field Dig Unity RMSE
±1.17% WT
100% within ±10% MFL spec
ILI-to-ILI Box-Matched Anomalies — Ranked by "Days Until This Anomaly Needs a Dig"
36" OD (914.4 mm) × 12.7 mm WT · API 5L X65 (SMYS 448 MPa) · MAOP 10.20 MPa · Active Code: 49 CFR 192 + ASME B31.8S (US PHMSA) · Burst Model: Modified ASME B31G (0.85dL)
| Anomaly / Weld / Clock | ILI Depth History (%WT) | Bayesian Rate & Next ILI | Burst P_fail & FPR | Years to 80% WT / FPR | Days Until Dig Required | Governed Action |
|---|---|---|---|---|---|---|
ILI-GW1040-0530 GW 1040 · 14.82 km · Clock 05:30 Coal-Tar Enamel · Saline Sabkha Clay | 2018: 28% 2022: 41.5% 2026 (Current): 56% (7.11 mm) Length: 185 mm | 0.421 mm/yr (3.31%/yr) Raw diff: 3.63%/yr Next ILI (+4yr): 69.3% WT | P_fail: 10.5 MPa FPR: 1.03×MAOP Safe P_op: 7.55 MPa Class 3 HCA · PIR 291 m | To 80% WT: 7.24 yr To FPR < 1.39: 0 yr TVC MAOP Score: 94% | 0 days By 2026-10-13 Immediate — Hard-Gated Human Review | AC interference corridor (400 kV parallel) + low-CP sabkha dip |
ILI-GW1185-0600 GW 1185 · 18.45 km · Clock 06:00 PE Tape · Seasonal Wet Loam | 2018: 36% 2022: 52% 2026 (Current): 69.5% (8.83 mm) Length: 240 mm | 0.501 mm/yr (3.95%/yr) Raw diff: 4.38%/yr Next ILI (+4yr): 85.3% WT | P_fail: 8.33 MPa FPR: 0.82×MAOP Safe P_op: 5.99 MPa Class 3 HCA · PIR 291 m | To 80% WT: 2.66 yr To FPR < 1.39: 0 yr TVC MAOP Score: 76% | 0 days By 2026-10-13 Immediate — Hard-Gated Human Review | Cased road crossing + disbanded PE tape shielding CP |
ILI-GW1210-0430 GW 1210 · 19.12 km · Clock 04:30 Coal-Tar Enamel · Saline Sabkha Clay Type-B Sleeve & Epoxy Recoat (2022-11) | 2018: 44% 2022: 61% 2026 (Current): 14% (1.78 mm) Length: 150 mm | 0.123 mm/yr (0.97%/yr) Raw diff: 1%/yr Next ILI (+4yr): 17.9% WT | P_fail: 13.75 MPa FPR: 1.35×MAOP Safe P_op: 9.89 MPa Class 2 · PIR 291 m | To 80% WT: 68.23 yr To FPR < 1.39: 0 yr TVC MAOP Score: 98% | 0 days By 2026-10-13 Post-Repair Reset Cycle | Remediated in 2022 via Clock-Spring composite sleeve (Cycle Reset) |
ILI-GW1420-0730 GW 1420 · 27.6 km · Clock 07:30 FBE · Well-Drained Sand | 2018: 19% 2022: 31% 2026 (Current): 33.5% (4.25 mm) Length: 130 mm | 0.173 mm/yr (1.36%/yr) Raw diff: 0.63%/yr Next ILI (+4yr): 38.9% WT | P_fail: 12.94 MPa FPR: 1.27×MAOP Safe P_op: 9.31 MPa Class 1 · PIR 291 m | To 80% WT: 34.14 yr To FPR < 1.39: 0 yr TVC MAOP Score: 92% | 0 days By 2026-10-13 Immediate — Hard-Gated Human Review | Wadi flood scour & thermal cycling zone |
ILI-GW1590-0500 GW 1590 · 34.08 km · Clock 05:00 PE Tape · Seasonal Wet Loam | 2018: 31% 2022: 46.5% 2026 (Current): 63% (8 mm) Length: 210 mm | 0.487 mm/yr (3.84%/yr) Raw diff: 4.13%/yr Next ILI (+4yr): 78.3% WT | P_fail: 9.44 MPa FPR: 0.93×MAOP Safe P_op: 6.79 MPa Class 4 HCA · PIR 291 m | To 80% WT: 4.43 yr To FPR < 1.39: 0 yr TVC MAOP Score: 68% | 0 days By 2026-10-13 Immediate — Hard-Gated Human Review | Rectifier RT-04 outage zone + stray DC traction current |
ILI-GW1740-0615 GW 1740 · 41.9 km · Clock 06:15 3LPE · Calcareous Gravel | 2018: 12% 2022: 16.5% 2026 (Current): 20.5% (2.6 mm) Length: 95 mm | 0.133 mm/yr (1.05%/yr) Raw diff: 1%/yr Next ILI (+4yr): 24.7% WT | P_fail: 13.84 MPa FPR: 1.36×MAOP Safe P_op: 9.96 MPa Class 2 · PIR 291 m | To 80% WT: 56.61 yr To FPR < 1.39: 0 yr TVC MAOP Score: 99% | 0 days By 2026-10-13 Immediate — Hard-Gated Human Review | Nominal baseline segment |