西气东输二线工程X80钢自动焊焊接工艺

摘要

Taking X80 pipeline steel used in West to East Gas Pipeline II Project as the research object, the X80 pipeline steel was welded under the selected welding technical parameters using STT root welding and filling covered surface by PAW2000 all position automatic welding machine,and mechanical properties of the joints were tested. The testing results show that the welding procedure used for X80 pipeline steel is appropriate, and the joint's performance can meet the requirements of standard Q/SY GJX 0110- 2007. It has been successfully used in west to east gas pipeline II project and has got good welding quality.%为满足西气东输二线工程对管道焊接质量的要求,对现场使用的X80钢管焊接工艺进行了研究.采用STT半自动根焊+PAW2000全位置自动焊填充、盖面焊接方法,在选择的焊接工艺参数条件下,对X80钢管进行了焊接,并对焊接接头的力学性能进行了检测.测试结果表明,接头的各项性能指标均符合Q/SY GJX 0110-2007标准,选定的焊接工艺完全满足现场自动焊施工的技术要求.此工艺已成功用于西气东输二线工程,取得了良好的焊接效果.