摘要
热煨弯管的防腐一直是埋地管道防腐的薄弱环节,直接影响管道的使用寿命。防腐性能优异的3PE防腐层在直管防腐中广泛采用,而热煨弯管3PE防腐在国内外还是空白。文章就热煨弯管3PE防腐进行了研究,热煨弯管3PE防腐层由环氧粉末底层、共聚物胶中间层和聚乙烯表层组成。共聚物胶和聚乙烯在工厂内加工成一定宽度和厚度的复合PE带,在防腐作业线上采用行星式缠绕机按照冷带热缠工艺进行防腐作业;环氧粉末采用高压静电喷涂。文中还对除锈和防腐的两套圆环型自动控制作业线进行了阐述。
Anticorrosion of heating bend pipes is a problem all along in buried pipeline construction. It affects directly the service life of the pipeline. Although 3PE anticorrosion layer with excellent anticorrosion performance is widely used in straight pipes, 3PE anticorrosion layer used for heating bend pipes is still absent at home and abroad. In this paper, the research on 3PE anticorrosion layer used for heating bend pipes is described. The anticorrosion layer consists of an epoxy powder primer, a polymer glue intermediate layer and a polyethylene surface layer. Polymer glue and polyethylene are formed a composite PE tape of certain width and thickness at workshop, then it is sent to an anticorrosion production line to perform anticorrosion operation by a planet wrapping machine according to the cold tape-heating wrapping process. Epoxy is sprayed with high electric voltage spraying method. Two sets of orbicular automatic control operation lines, i.e. derusting and anticorrosion, are illustrated. The research work on 3PE anticorrosion technique of heating bending pipe is successful for the first time in our country. It will have a wide market along with the booming oil and gas pipeline constructions.
出处
《石油工程建设》
2007年第6期40-42,共3页
Petroleum Engineering Construction
关键词
热煨弯管
3PE防腐
复合PE带
heating bending pipe
3PE
composite PE tape
anticorrosion tape
