摘要
随着管道技术的发展,预制直埋管得到推广应用,尤其是玻璃钢预制直埋管因方便场内加工、标准化控制及规模化生产,在大口径管线工程中被大量使用。经过多年运行,发现管道中常出现的隐患位于防腐补口位置,如何加强防腐补口管理、提高质量控制水平尤为重要。为此,通过探索及逐步完善,改进了玻璃钢预制直埋管补口工艺,从施工准备、钢管处理、玻璃钢外护层施工、气密性试验、补口区发泡工艺、成品养护等方面加以过程控制和结果检验,以全面提高现场防腐补口质量。改进的玻璃钢预制直埋管补口技术进一步优化了补口工艺及流程,现场易于把控质量节点,经现场实践验证,气密性检测一次合格率达到98%以上,大大提高了防腐补口作业效率。
With the development of pipeline technology,prefabricated directly buried pipelines have been widely used,especially those with FRP outer sheath are widely used in large-diameter pipeline engineering for their convenience of in-situ processing,standardized control and large-scale production.After years of operation,it is found that hidden dangers often appear in the pipeline,which is located in the position of anti-corrosion joint.How to strengthen the management of anti-corrosion joint coating and improve the quality control level is particularly important.After years of exploration,the joint repair process of FRP prefabricated directly buried pipe has been gradually improved,and the process control and result inspection have been carried out from the aspects of construction preparation,steel pipeline treatment,FRP outer protective layer construction,air tightness test,foaming process in joint repair area,finished product maintenance,etc.,so as to comprehensively improve the on-site anti-corrosion joint repair quality.The improved joint repair technology for FRP prefabricated directly buried pipeline further optimizes the process and flow,and it is easy to control the quality node on site.The field practice shows that the first pass rate of air tightness test is more than 98%,which greatly improves the operation efficiency of anti-corrosion joint repair.
作者
朱铁军
ZHU Tiejun(New Energy Development Center,Shengli Petroleum Administration Co.,Ltd.)
出处
《油气田地面工程》
2021年第4期82-85,共4页
Oil-Gas Field Surface Engineering
关键词
玻璃钢预制直埋管
现场补口
工艺优化
气密性
FRP prefabricated directly buried pipe
on-site joint repair
process optimization
air tightness
