Cross-welding column and booms and the welding roller frame are used to complete longitudinal and circumferential surfacing of internal wall of large cylinder shell, and the narrow gap welding of vertical circumferential weld inside and outside cylinder shell. DIG's narrow gap submerged arc welding system is a set of closed-loop submerged arc welding system that can accurately realize narrow welding butting.The minimum end of I-type slope submerged arc welding can be narrow to 18mm with the depth of the welding torch reaching 350mm. When the plate thickness is 50mm, the welding efficiency of I-type slope submerged arc welding is 0.5 times higher than that of ordinary submerged arc welding. When the plate thickness reaches 200mm, the efficiency can be increased by at least 1.5 times.
Cross-welding column and booms and the welding roller frame are used to complete longitudinal and circumferential surfacing of internal wall of large cylinder shell, and the narrow gap welding of vertical circumferential weld inside and outside cylinder shell. DIG's narrow gap submerged arc welding system is a set of closed-loop submerged arc welding system that can accurately realize narrow welding butting.The minimum end of I-type slope submerged arc welding can be narrow to 18mm with the depth of the welding torch reaching 350mm. When the plate thickness is 50mm, the welding efficiency of I-type slope submerged arc welding is 0.5 times higher than that of ordinary submerged arc welding. When the plate thickness reaches 200mm, the efficiency can be increased by at least 1.5 times.