Petroleum and natural gas industries — External coatings for buried or submerged pipelines used in pipeline transportation systems — Part 4: Polyethylene coatings (2-layer PE)
石油和天然气工业——管道运输系统用埋地或水下管道的外涂层第4部分:聚乙烯涂层(2层PE)
发布日期:
2009-11-05
ISO 21809-4:2009规定了用于ISO 13623中定义的石油和天然气行业管道运输系统中裸钢管防腐的外部双层聚乙烯涂层(2层PE)工厂应用材料的鉴定、应用、检查、测试、搬运和储存要求。
ISO 21809-4:2009 specifies the requirements for qualification, application, inspection, testing, handling and storage of materials for plant application of two-layer polyethylene coatings (2-layer PE) applied externally for the corrosion protection of bare steel pipe for use in pipeline transportation systems for the petroleum and natural gas industries as defined in ISO 13623.