标准编号：ISO 21809-5:2017
中文名称：石油和天然气工业 管道输送系统中使用的地下或水下管道的外部涂层 第5部分：外部混凝土涂层
英文名称：Petroleum and natural gas industries — External coatings for buried or submerged pipelines used in pipeline transportation systems — Part 5: External concrete coatings
发布日期：2017-06
标准范围
This document specifies the requirements for qualification, application, testing and handling of materials required for the application of reinforced concrete coating externally to either bare pipe or pre-coated pipe for use in pipeline transportation systems for the petroleum and natural gas industries as defined in ISO 13623.
The external application of concrete is primarily used for the negative buoyancy of pipes used in buried or submerged pipeline systems and/or for the mechanical protection of the pipe and its pre-coating.
This document is applicable to concrete thicknesses of 25 mm or greater.
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