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ISO 21809-11 specifies the criteria and requirements for the in-field application of coatings, coating repair and coating rehabilitation on buried pipelines. This document specifies: - coating assessment (new and existing); - removal of degraded coatings; - surface preparation; - on site or in situ application of external coatings. It is applicable to petroleum or natural gas pipelines, with or without a cathodic protection system. The pipelines could be operational during the removal, preparation and application process. This document states 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. Technical and performance characteristics of the repair and rehabilitation coating materials are referenced to ISO 21809-3. The coating of field joints is outside the scope of this document. Field joint coatings are dealt with in ISO 21809-3. This document excludes the application of coatings when the pipeline is immersed (submerged).
||Aardolie- en aardgasindustrie - Uitwendige deklagen voor ondergrondse en verzonken leidingen gebruikt in transportleidingsystemen - Deel 11: Deklagen voor toepassing in het veld, coatingreparaties en herstel
||Petroleum and natural gas industries - External coatings for buried or submerged pipelines used in pipeline transportation systems - Part 11: Coatings for in-field application, coating repairs and rehabilitation