针对进口APILx52钢管(管径330mm,壁厚6mm)天然气长输管道(管内压力为1.6MPa)的焊接,从焊接方法及焊接材料的选择、坡口形式及其制备、焊工操作要求、焊接工艺和焊接检验等方面进行了论述。要获得其优质焊接接头,必须严格控制焊接工艺,并对不合格焊缝进行合理的返修,从而获得优质的焊接质量。 For the welding of imported APILx52 steel pipe (diameter 330mm, wall thickness 6mm) natural gas long-distance pipe (pipe internal pressure 1.6MPa), from the selection of welding methods and welding materials, groove form and preparation, welder operation requirements, welding process and Welding inspection and other aspects were discussed. To obtain its high-quality welded joints, we must strictly control the welding process, and unqualified weld reasonable rework, in order to obtain high quality welding quality.