Research and development of 3PP coating steel pipes

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.

埋地钢质油气管道外检测项目及典型问题分析

本文对埋地钢质油气管道检验检测法规标准进行了系统梳理,详细阐述了宏观检查、敷设环境调查、防腐层检查、阴极保护系统测试、穿跨越段检查、开挖直接检验等6个外检测项目的检测要求、检测方法、检测设备、检测实施注意事项及检测结果评判依据。结合笔者多年的实际检测工程经验,对各个检测项目可能发现的问题进行了举例,并将检测实践中发现的典型缺陷进行了展示,可为埋地钢质油气管道建设、施工、运营、检验检测及维护维修人员提供参考,以期共同保障油气管网的安全、平稳运行。

探究埋地钢制油气管道的防腐蚀策略及其实践

随着油气输送需求的不断增长,埋地钢制油气管道的安全与稳定运行显得尤为重要。通过分析了土壤腐蚀、电化学腐蚀等多种腐蚀机制,并讨论了绝缘层防腐、电保护防腐技术以及其他防腐技术的应用与实践。通过具体案例展示各种防腐策略在实际工程中的效果,为相关工程提供了理论与实践指导。

埋地输油钢质管道腐蚀与防护策略

近几年,为了有效预防管道的腐蚀现象,我国开展了管道防腐技术与材料等深层分析,尤其是杂散电流的干扰领域中,电法保护与排流策略获得了普及推广。故此,本文就埋地输油钢质管道的腐蚀问题,分析腐蚀防护策略,深层研究杂散电流干扰的防护策略,仅供参考。