东非项目中长段及特殊地段连头施工焊接质量与效率提升分析

Analysis of Quality and Efficiency Improvement in Construction Welding for Long Sections and Special Areas in the East African Project

摘要: 本文聚焦东非原油管道中长段及特殊地段手工焊接连头施工存在的效率低、质量缺陷(如密集气孔、咬边等)问题，结合现场实际分析，指出缺陷主要源于焊工对低氢焊条(E9018)操作不足。为解决这些问题，文章从多维度提出改进建议：强化人员质量意识与施工规划，通过统筹工序衔接提升效率；加强焊接设备(如熊谷逆变直流焊机)及辅助设备的维护保养，确保稳定运行；规范焊材管理，重点做好防潮、保护气体纯度把控及低氢焊条正确使用；严格执行焊接工艺规程，从坡口加工、组对参数、根焊与填充盖面操作等环节细化标准；同时关注地形、温湿度等环境因素的影响。研究表明，通过人员、设备、材料、工艺及环境的协同管控，可有效减少焊接缺陷，提升施工质量与效率，保障东非原油管道连头施工顺利推进。

Abstract: This article focuses on the problems of low efficiency and quality defects (such as dense pores and undercut) in the manual welding and jointing construction of long sections and special sections of the East African crude oil pipeline. Based on the analysis of the actual situation on site, it is pointed out that the defects mainly result from the welders’ insufficient operation of low-hydrogen electrodes (E9018). To solve these problems, the article proposes improvement suggestions from multiple dimensions: strengthening the quality awareness of personnel and construction planning, improving efficiency by coordinating the connection of processes; enhancing the maintenance and care of welding equipment (such as the KOBELCO inverter DC welder) and auxiliary equipment to ensure stable operation; standardizing the management of welding materials, with a focus on moisture prevention, control of the purity of protective gas, and correct use of low-hydrogen electrodes; strictly implementing welding process regulations, and refining standards in aspects such as groove processing, assembly parameters, root welding, and filling and capping operations; and paying attention to the influence of environmental factors such as terrain, temperature and humidity. Research shows that through the coordinated management of personnel, equipment, materials, processes and environment, welding defects can be effectively reduced, construction quality and efficiency can be improved, and the smooth progress of the jointing construction of the East African crude oil pipeline can be ensured.