The cold cracking sensibility of high tensile pipeline-steel was studied by Ygroove cracking test using seven kinds of high cellulose electrode of vertical down position welding. 采用七种高纤维素型立向下电焊条,通过斜Y坡口裂纹实验,对高强管线钢的冷裂敏感性进行实验研究。
In this paper, the improvement of vertical down welding in piping is introduced and the technology of mixed vertical downwards welding and co-operated vertical down welding are described. 介绍了手工向下焊焊接工艺在长输管道焊接方面的发展,主要叙述了混合型向下焊焊接工艺和复合型向下焊焊接工艺的应用。
Present situation and developing tendency of the vertical down welding technology of pipeline in China 我国长输管道下向焊技术的现状及发展趋势
Research on Low Cellulose Type Covered Electrode for All Position and Vertical Down Welding 低纤维素型全位置立向下焊条的研究
Application of vertical down welding for gas pipe line 天然气长输管道下向焊接技术的应用
Vertical down co_2 welding for fin tubes of boiler 锅炉鳍片管的CO2向下立焊