Terminal & pipeline · risk-based inspection
| System | Rate mm/yr | Remaining life yr | L × C | Risk | Interval yr | Next inspection |
|---|---|---|---|---|---|---|
DEMO · Jetty 1 product transfer line DEMO-CI-JT-01 · AS 2885.3 / applicable piping code · confirm basis · rate: two-point synthetic Assumptions & source readings2022-03-16: 6.6 mm → 2026-03-16: 6.1 mm Assumed minimum: 5.8 mm; interval cap: 5 yr Marine atmospheric corrosion · Pipeline integrity engineer DEMO · synthetic Channel scenario at 2026-10-28. Not actual telemetry, survey geometry, inspection evidence or design data. Thicknesses and five-year interval cap are assumptions, not actual readings or statutory maxima. DEMO status out_of_service prevents any implied operating clearance. No fitness-for-service decision. Retain repeat accepted NDT, coating/settlement or pressure-test QA as applicable and signed return-to-service acceptance. Source: 6ae23fbd713e4798a88f3528 | 0.125 | 2.4 | 4 × 4 | very high | 1.0 | 2027-03-16 |
DEMO · Pipeline pump manifold DEMO-CI-PM-01 · AS 2885.3 / applicable piping code · confirm basis · rate: two-point synthetic Assumptions & source readings2022-03-16: 7.4 mm → 2026-03-16: 6.9 mm Assumed minimum: 6 mm; interval cap: 5 yr Localised corrosion · Pipeline integrity engineer DEMO · synthetic Channel scenario at 2026-10-28. Not actual telemetry, survey geometry, inspection evidence or design data. Thicknesses and five-year interval cap are assumptions, not actual readings or statutory maxima. DEMO status out_of_service prevents any implied operating clearance. No fitness-for-service decision. Retain repeat accepted NDT, coating/settlement or pressure-test QA as applicable and signed return-to-service acceptance. Source: 6ae23fbd713e4798a88f352a | 0.125 | 7.2 | 3 × 3 | high | 3.0 | 2029-03-15 |
DEMO · Northern pipeline review section DEMO-CI-PL-N01 · AS 2885.3 / applicable piping code · confirm basis · rate: two-point synthetic Assumptions & source readings2022-03-16: 7.2 mm → 2026-03-16: 6.7 mm Assumed minimum: 5.2 mm; interval cap: 5 yr External corrosion / coating damage · Pipeline integrity engineer DEMO · synthetic Channel scenario at 2026-10-28. Not actual telemetry, survey geometry, inspection evidence or design data. Thicknesses and five-year interval cap are assumptions, not actual readings or statutory maxima. DEMO status out_of_service prevents any implied operating clearance. No fitness-for-service decision. Retain repeat accepted NDT, coating/settlement or pressure-test QA as applicable and signed return-to-service acceptance. Source: 6ae23fbd713e4798a88f3527 | 0.125 | 12.0 | 2 × 3 | medium | 5.0 | 2031-03-16 |
DEMO · Reserve tank shell review DEMO-CI-TK-R101 · API 653-style screening · applicability unconfirmed · rate: two-point synthetic Assumptions & source readings2022-03-16: 8.2 mm → 2026-03-16: 7.9 mm Assumed minimum: 6 mm; interval cap: 5 yr External coating breakdown · Tank integrity engineer DEMO · synthetic Channel scenario at 2026-10-28. Not actual telemetry, survey geometry, inspection evidence or design data. Thicknesses and five-year interval cap are assumptions, not actual readings or statutory maxima. DEMO status out_of_service prevents any implied operating clearance. No fitness-for-service decision. Retain repeat accepted NDT, coating/settlement or pressure-test QA as applicable and signed return-to-service acceptance. Source: 6ae23fbd713e4798a88f3529 | 0.075 | 25.3 | 1 × 3 | low | 5.0 | 2031-03-16 |
DEMO · Repurposing tank evidence gap DEMO-CI-TK-X101 · API 653-style screening · applicability unconfirmed · rate: insufficient readings Assumptions & source readingsUndated: — mm → 2026-03-16: 7.8 mm Assumed minimum: missing mm; interval cap: 5 yr Damage mechanism unconfirmed · Tank integrity engineer DEMO · synthetic Channel scenario at 2026-10-28. Not actual telemetry, survey geometry, inspection evidence or design data. Thicknesses and five-year interval cap are assumptions, not actual readings or statutory maxima. DEMO status out_of_service prevents any implied operating clearance. No fitness-for-service decision. Retain repeat accepted NDT, coating/settlement or pressure-test QA as applicable and signed return-to-service acceptance. Source: 6ae23fbd713e4798a88f352b | No data: needs two dated thickness readings (or an engineer rate) plus minimum required thickness. | |||||
Method, limits and inspection acceptance
DEMO two-point rate = thickness change ÷ elapsed years. Remaining life = (latest − assumed minimum) ÷ rate; no observed loss does not prove indefinite life. Likelihood brackets are <2 / <5 / <10 / <20 years. Consequence is an assumed record class, not an approved study. Interval = minimum of half remaining life, 10 / 5 / 3 / 1-year risk caps and the record maximum. These are illustrative API 580-style screens, not API 581 calculations, adopted API 653 intervals or statutory determinations. Dates are calculated from each synthetic inspection date; overdue comparison uses today.
The tank/pipeline integrity engineer must verify minimum thickness, measurement quality, applicable standards, licence conditions and approved intervals. After work, retain accepted repeat NDT and coating/settlement or pressure-test evidence as applicable; update the approved plan only after accountable review. The unassessed record deliberately demonstrates missing evidence.