ISO 15589-2 specifies requirements and gives recommendations for the pre-installation surveys, design, materials, equipment, fabrication, installation, commissioning, operation, inspection and maintenance of cathodic protection (CP) systems for offshore pipelines for the petroleum, petrochemical, and natural gas industries as defined in ISO 13623.
ISO 15589-2 is applicable to carbon steel, stainless steel, and flexible pipelines in offshore service. ISO 15589-2 is applicable to retrofits, modifications, and repairs made to existing pipeline systems.
ISO 15589-2 is applicable to all types of seawater and seabed environments encountered in submerged conditions and on risers up to mean water level.
ISO 15589-2 on cathodic protection of pipeline transportation systems for Offshore pipelines is useful for:
Pipeline cathodic protection is achieved by the supply of sufficient direct current to the external pipe surface, so that the steel-to-electrolyte potential is lowered on all the surface to values at which external corrosion is reduced to an insignificant rate.
Cathodic protection is normally used in combination with a suitable protective coating system to protect the external surfaces of steel pipelines from corrosion.
Adhering to guidelines specified in ISO 15589-2 also allows you:
Overall, ISO 15589-2 provides guidance on design, installation, and maintenance of cathodic protection of pipeline transportation systems for offshore pipeline, which helps ensure prevention of external corrosion over the design life of the pipeline.
Note: This part of ISO 15589 can also be used for offshore pipelines outside the petroleum, petrochemical and natural gas industries
EN ISO 15589-2:2014
ISO 15589-2