The product quality and technical performance of the welded gasket conform to the shipbuilding code and the shipbuilding industry standard certification of the People's Republic of China. Put the liner on the back of the groove of the shape and size specified by the steel plate and the workpiece, and weld it from the front, so that both sides can be formed at one time, the back weld is full and the weld traces are neat. The product has good moisture resistance, stable arc during welding, ensures welding quality, improves work efficiency, and greatly improves the working conditions of welders. Ceramic welding backing is suitable for welding processes in shipbuilding, bridges, boilers, pressure vessels, steel structures and other industries. A paste-type ceramic welding backing is used for single-sided butt welding of general structural steel and common low-alloy structural steel in horizontal, vertical and transverse positions, and is easy to operate. Ceramic welding gasket products are widely used in shipbuilding, steel structures, bridges, buildings, pipeline engineering, pressure vessels, chemical machinery, and metallurgical machinery manufacturing. In the installation and construction of steel structures, the corner joints between columns and beams are full-penetration welds, which belong to class II welds and require 20% UT flaw detection. This type of welded joint has high quality requirements and is basically high-altitude welding on site, so welding is difficult. In order to facilitate the welding construction, ensure the welding quality and improve the welding efficiency, the method of adding a welding backing to the back of the weld is adopted. Put the liner on the back of the groove of the specified shape and size of the steel plate and the workpiece, and weld from the front, which can form both sides at one time, the back weld is full, the weld traces are neat, and the shape is beautiful. With this method, the arc is stable during welding, the welding quality is guaranteed, the work efficiency is improved, the working conditions of the welders are greatly improved, and the construction period is shortened. CO2 single-sided welding is a highly technical welding method. Although there are many factors that affect the double-sided forming of welds, such as equipment performance, climate, construction space environment, network voltage, and personnel quality, the more important thing is the personnel quality. The quality of welders is manifested in aspects such as cognition (theoretical level), skills, proficiency and work attitude. Therefore, even if the appropriate welding specification parameters are used, in order to obtain satisfactory weld quality, it is necessary to master accurate operation methods and technical essentials.