ISO 21809-3:2016/Amd 1:2020

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Petroleum and natural gas industries — External coatings for buried or submerged pipelines used in pipeline transportation systems — Part 3: Field joint coatings — Amendment 1: Introduction of mesh-backed coating systems

"ISO 21809-3:2016/Amd 1:2020" refers to an International Standard that specifies requirements for external coatings used on field joints of buried or submerged pipelines in the petroleum and natural gas industries, with the "Amd 1:2020" part indicating it is the first amendment to the original standard published in 2016, which was updated in 2020