标准编号：ISO 21809-5:2010
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：2010-04
标准范围
This part of ISO 21809 specifies the requirements for qualification, application, testing and handling ofmaterials required for the application of reinforced concrete coating externally to either bare pipe or pre-coatedpipe for use in pipeline transportation systems for the petroleum and natural gas industries as defined inISO 13623.The external application of concrete is primarily used for the negative buoyancy of pipes used in buried orsubmerged pipeline systems and/or for the mechanical protection of the pipe and its pre-coating.This part of ISO 21809 is applicable to concrete thicknesses of 25 mm or greater.
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