ISO 21809-2:2014
石油和天然气工业. 管道运输系统用掩埋于地下或淹没于水下的管道外部覆盖层. 第2部分: 单层熔接环氧涂层
Petroleum and natural gas industries - External coatings for buried or submerged pipelines used in pipeline transportation systems - Part 2: Single layer fusion-bonded epoxy coatings