ISO DIS 21809-11

Description / Abstract: For buried pipelines, this document specifies the criteria and requirements for:

- coating assessment,

- removal of degraded coatings,

- surface preparation

- on site or in situ application of external coatings used for repairs and rehabilitation.

It’s applicable to petroleum or natural gas pipelines, with or without a cathodic protection system.

The pipelines might be operational during the removal, preparation and application process.

This document will state qualification/testing for field Contractors and site applied coatings to all of the pipeline components, including bends, tees, fittings, valves and interfaces between different coatings in soil to air pipeline sections. The coating of field joints is outside this document. Field joint coatings are dealt with in ISO 21809-3.

Technical and performance characteristics of the coating materials are referenced to ISO 21809-3.