What is EN ISO 21809-5:2018?

EN ISO 21809-5:2018 is an international standard that provides guidelines for the application and testing of external coatings for buried or submerged pipelines used in the petroleum, petrochemical, and natural gas industries. This standard specifies the requirements for coatings to prevent corrosion and ensure the durability and reliability of the pipelines.

The Importance of EN ISO 21809-5:2018

EN ISO 21809-5:2018 plays a vital role in ensuring the integrity of buried or submerged pipelines. The external coating acts as a protective layer, shielding the pipeline from corrosive environments such as soil, water, and chemicals. By complying with this standard, pipeline operators can prevent costly damage due to corrosion, maintain operational safety, and extend the lifespan of the pipelines.

Testing and Compliance

To meet the requirements of EN ISO 21809-5:2018, the external coatings must undergo various tests to determine their suitability for the intended service conditions. These tests include adhesion, thickness measurement, impact resistance, holiday detection, and cathodic disbondment. Compliance with the standard ensures that the coatings provide sufficient protection against corrosion and have the necessary mechanical properties to withstand environmental stresses.

Application Guidelines

EN ISO 21809-5:2018 also provides guidance on the application of external coatings. It covers surface preparation, coating material selection, application methods, curing processes, and quality control measures. Proper application is crucial to achieve optimal adhesion and coverage, which in turn ensures long-term protection against corrosion. Following the guidelines outlined in this standard helps to minimize the risk of coating failures and ensures the overall effectiveness of the protective system.