UONII-13/55 electrodes are the most versatile in terms of their breadth of application. Over the 80 years of use in the USSR and Russia, they have earned a high rating among specialists and today are considered the most reliable, efficient and effective. UONI-13/55 welding electrodes are used in manual arc welding of carbon and low-alloy steels (48KS, 10XSN2D, 10XSNND, 09G2, Bst3, St3s and others) responsible for the construction of structures. It is possible to connect thick parts, surface.