EN ISO 18086:2020

Corrosion of metals and alloys - Determination of AC corrosion - Protection criteria (ISO 18086:2019) EN ISO 18086:2020

Publication date:   May 19, 2021

General information

60.60 Standard published   Dec 23, 2020

CEN

CEN/TC 219 Cathodic protection

European Norm

77.060   Corrosion of metals

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Scope

This document specifies protection criteria for determining the AC corrosion risk of cathodically protected pipelines.
It is applicable to buried cathodically protected pipelines that are influenced by AC traction systems and/or AC power lines.
In the presence of AC interference, the protection criteria given in ISO 15589-1 are not sufficient to demonstrate that the steel is being protected against corrosion.
This document provides limits, measurement procedures, mitigation measures, and information to deal with long-term AC interference for AC voltages at frequencies between 16,7 Hz and 60 Hz and the evaluation of AC corrosion likelihood.
This document deals with the possibility of AC corrosion of metallic pipelines due to AC interferences caused by conductive, inductive or capacitive coupling with AC power systems and the maximum tolerable limits of these interference effects. It takes into account the fact that this is a long-term effect, which occurs during normal operating conditions of the AC power system.
This document does not cover the safety issues associated with AC voltages on pipelines. These are covered in national standards and regulations (see, e.g., EN 50443).

Life cycle

PREVIOUSLY

WITHDRAWN
EN ISO 18086:2017

NOW

PUBLISHED
EN ISO 18086:2020
60.60 Standard published
Dec 23, 2020

Relations

Adopted from ISO 18086:2019 IDENTICAL