7. Coating rehabilitation

Following the various pipeline inspection campaigns, coating rehabilitation operations are performed, either on an ad hoc basis to rectify a particular defect, or over longer lengths, sometimes up to several kilometres. Careful selection of the rehabilitation coating is essential, because not only must it allow optimal protection against corrosion, but it must also be suitable for application under the structure’s current conditions.

It is necessary to consider compatibility between the existing coating and the rehabilitation coating. It is therefore essential for the pipeline network operator to know the type of product already in place so that they can plan ahead for selection of the rehabilitation system.

The second key point is the operating conditions of the structure needing rehabilitation....

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Conclusion

Bibliographical sources

(1) - BAROUX (B.) - La corrosion des métaux, passivité et corrosion localisée . - Dunod (2014).
(2) - BERANGER (G.), MAZILLE (H.) - Corrosion et anticorrosion, pratique industrielle ....

Norms and standards

Paints & Varnishes – Corrosion protection of steel structures by protective paint systems - ISO 12944-5 - 2018
Preparation of steel substrates before application of paints and related products – Visual assessment of surface cleanliness – Part 1: Rust grades and preparation grades of uncoated steel substrates and of steel substrates after overall removal of previous coating - ISO 8501-1 - 2007
Petroleum...

Regulations

Articles L. 555-1 to L. 555-30 of the French Environmental Code

Articles R. 555-1 to R. 555-52 of the French Environmental Code

GESIP technical guides

Decree of 5 March 2014 defining arrangements for the application of Chapter V of Part V of Book V of the Environmental Code including regulations on the safety of pipelines for the transport of natural...