spiral seam

基本解释

Inside welding seam cracking of spiral submerged Arc welded pipe is the unsolved problem for many years in the pipe field.
螺旋埋弧焊钢管内焊缝裂纹是本行业多年未解决的问题。
Defect categories and features of spiral seam cracking are studied based on spiral seam cracking facts in Northeastern Oil Pipeline Networks.
针对东北管网多次发生螺旋焊缝开裂事故的事实，研究了造成螺旋焊缝开裂事故的缺陷类型和特征。
This paper introduces the measure, welding method and inspection result to prevent the welding deformation formation of spiral-seam pipe header after tapping.
介绍了在螺旋焊缝汇管上焊接支管时的防变形措施、焊接方法和检验结果。