Research and development of 3PP coating steel pipes  

作　　者：FANG Wenqi MA Yuan HUI Linlin 

机构地区：[1]Research Institute,Baoshan Iron&Steel Co.,Ltd.,Shanghai 201999,China

出　　处：《Baosteel Technical Research》2024年第2期1-11,共11页宝钢技术研究（英文版）

摘　　要：The industrial application of an exterior three-layer anticorrosive polypropylene coating system(3PP)on large-diameter(larger than Φ600 mm)steel pipes was developed using an experimental process simulation study and the optimization of raw materials inspection,steel pipe surface pretreatments,and water cooling control on a coating application process.The coating properties meet ISO standard 21809 on buried or submerged 3PP pipelines used in the petroleum and natural gas industries.Differential scanning calorimetry and X-ray diffraction were used to analyze the crystallinities and grain sizes of polypropylene(PP)top coats with different cooling rates.Increasing the melt cooling rate reduces the crystallinity and grain size of the PP top coat and enhances its strength and toughness.

关 键 词：3PP steel pipe oil and gas pipelines cathodic disbondment polypropylene coatings exterior anticorrosive system 

分 类 号：TE988.2[石油与天然气工程—石油机械设备]