原油集输系统壁厚＜5mm的薄壁管道焊接技术

壁厚 ５ｍｍ以下的无缝钢管用于设计压力９．５ＭＰａ的管线，能否采用普通手工电弧焊工艺代替氩弧焊打底、手工电弧焊盖面工艺施焊？设计部门和施工单位分别对其焊缝进行了强度核算和水压、气密性试验，在得到肯定回答的基础上，采取了保证手工电弧焊打底焊缝质量的技术和管理措施，既保证了集输管线的焊接质量，又加快了井口管线的施工进度、降低了开发工程成本。

Welding Technique for Flow Line System below 5mm Wall Thickness

Can argon arc root welding and manual arc cap welding be substituted with common manual arc welding on seamless steel line pipe below 5mm wall thickness with 9.5Mpa design pressure? The engineering and construction departments condueted strength checking, water and air integrity tests on such welds. After getting Positive results, manual arc root welding technique and managing measures were taken which guaranteed weld quality, assuring the welding quality on the flow line, increasing the construction progress wellhead pipes and reducing the project cost.