本文件规定了埋地管道涂层现场应用、涂层修复和涂层修复的标准和要求。 本文件规定: -涂层评估（新的和现有的）； -去除降解涂层； -表面处理； -现场或现场涂敷外部涂层。 适用于有或无阴极保护系统的石油或天然气管道。 在移除、准备和应用过程中，管道可以运行。 本文件规定了现场承包商的资格鉴定/测试，以及所有管道部件的现场涂层，包括弯管、三通、配件、阀门和土壤-空气管道段中不同涂层之间的接口。 修复和修复涂层材料的技术和性能特征参考ISO 21809-3。 现场接缝的涂层不在本文件范围内。现场接缝涂层在ISO 21809-3中进行了处理。 本文件不包括管道浸没（浸没）时的涂层应用。

This document 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).