What is EN ISO 21809-5:2018?

The standard EN ISO 21809-5:2018 is an internationally recognized technical specification that sets guidelines for the external coatings of buried or submerged pipelines used in oil and gas industries. This standard specifically focuses on the qualification and application of field joint coatings.

Importance of External Coatings

External coatings play a crucial role in protecting pipelines from corrosion, abrasion, and other environmental factors. These coatings act as an additional barrier, preventing contact between the pipeline and its surrounding environment, ensuring its integrity and extending its lifespan.

Qualification Process for Field Joint Coatings

EN ISO 21809-5:2018 defines a rigorous qualification process for field joint coatings. This process includes various steps such as surface preparation, primer application, intermediate layer coating, and a final synthetic material layer. Each step has specific requirements to ensure the efficiency and durability of the coating.

Application of EN ISO 21809-5:2018

The standard applies to both new and existing pipelines. For new pipelines, it is critical to adhere to the specifications outlined in the standard during the manufacturing and installation processes. Existing pipelines can also benefit from this standard by implementing suitable repairs and maintenance procedures to enhance their longevity.