●Reference Documents
the standards every reading, classification and action is measured againstThe parent standard. Defines the −850 mV instant-OFF criterion, the −850 mV ON criterion and the 100 mV polarisation criterion, plus interference control and design of the CP system.
Criteria · design · interferenceHow a CIPS is actually run: interruption cycle, reference cell placement, spacing, and how to handle IR drop. Governs the survey that produces our potential profile along chainage.
CIPS · survey methodThe four-step ECDA process — pre-assessment, indirect inspection, direct examination, post-assessment. Source of the %IR severity categories used in the DCVG defect log.
ECDA · defect classificationTest methods behind every number we record: reference electrode use, instant-OFF technique, depolarisation testing, and the errors that invalidate a reading.
Measurement · reference cellsInternational counterpart to SP0169. Anode bed design, current density requirements and commissioning. Used for our groundbed sizing and design-life calculations.
Design · anode systemsThe regulatory clock. Test stations must be surveyed at least once per calendar year at intervals not exceeding 15 months; rectifiers inspected six times per year at intervals not exceeding 2 months.
Intervals · recordsCertification levels for personnel signing off survey results and CP designs. Determines who may authorise a change of protection classification.
Competence · sign-offEvery protection classification in Corrovision cites the clause it was made under, so an auditor can trace a green dot back to the criterion that produced it.