The manufacturing and installation of DN4800 lined steel pipes in A2 and A3 bid sections of the Pearl River Delta Water Resources Allocation Project amounts to about 70,000 tons.The lining steel pipe walls are equipped with multi-channel stiffeners at every 1.2m interval,and the butt weld between the stiffeners and the steel pipes adopts double-sided full welding,which requires a large amount of welding engineering.Relying on the currently adopted single wire submerged arc welding process as the comparison object,combined with the structural distribution and weld requirements of large diameter steel pipe stiffeners,the study is carried out through the integration and automation of equipment,so that a single welding personnel can realize the simultaneous welding of double-sided and tow-channel stiffeners.In the case of meeting the welding angle size and quality,the welding completion time of each 12m standard pipe stiffener corner weld is no more than 8 hours,achieving the purpose of efficient welding.
large diameter steel pipestiffening ring fillet weldautomatehigh efficiency welding
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