立焊是指沿接头由上而下或由下而上焊接。焊缝倾角90°（立向上）、270°（立向下）的焊接位置，称为立焊位置。在立焊位置进行的焊接，称为立焊。
This research work will promote the application and development of the high efficient vertical welding.
该项研究必将促进高效自动立焊的应用和发展。
参考来源 - 复合控制强迫成形自动立焊系统的研制·2,447,543篇论文数据，部分数据来源于NoteExpress
介绍了大型管网施工工艺程序和混合型立向下焊焊接工艺原理。
Construction technology of large-scale pipeline and mixing type vertical downwards-welding technology is introduced.
采用药芯焊丝对奥氏体不锈钢管道进行打底焊接，MAG焊填充及盖面焊，立向上的水平固定全位置焊接。
Flux-cored wire is applied to the austenitic stainless steel pipe by back weld, MAG for the filling and cosmetic weld, at horizontal fixed round welding vertically up.
目前，国内带有立辊组的直缝焊管成型机大都采用双半径孔型。
The double radius hole type was commonly adopted for the forming machine of straight weld pipe with vertical roller in domestic present.
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