油气长输管线现场焊接的质量控制

Quality Control of Field welding of Oil and Gas Pipelines for Long Distance Transmission

油气长输管线现场环焊缝接头的焊接质量是决定管线质量、寿命的最根本要素。本文基于对油气长输管线现场焊接时各技术环节的分析,指出了各环节中容易对焊接质量造成影响的一些因素,重点从技术准备、焊前准备、焊接过程和焊缝返修四个方面提出了提高焊接质量的措施和工艺,对长输管线现场焊接具有一定的指导意义。

The welding quality of field-welded girth joints of long-distance oil and gas transmission pipelines is the key to the quality and service life of pipelines. Based on an analysis of the technical links of field welding, the factors that are likely to affect the welding quality are pointed out. The measures and processes for improving welding quality are proposed in terms of technical preparation, pre-welding preparation, welding process, and seam rewelding.