标准摘要
[中文适用范围]： 本文件规定了适用于石油和天然气工业中管道运输系统用埋地或水下焊接钢管和无缝钢管的工厂用外三层聚乙烯和聚丙烯涂层（3层PE和3层PP）的防腐要求，依据ISO 13623标准执行。注：按照本文件涂覆的管道被认为适合通过阴极保护进行进一步保护。 [外文原描述]： This document specifies requirements for plant-applied external three-layer polyethylene and polypropylene based coatings for corrosion protection of welded and seamless steel pipes for pipeline transportation systems in the petroleum and natural gas industries in accordance with ISO 13623. NOTE Pipes coated in accordance with this document are considered suitable for further protection by means of cathodic protection.
英文名称Petroleum and natural gas industries — External coatings for buried or submerged pipelines used in pipeline transportation systems — Part 1: Polyolefin coatings (3-layer PE and 3-layer PP)