Daqing Oilfield Construction Group won the bid for the construction of 30 100,000 m3 oil storage tanks in the first phase of Dalian National Strategic Reserve Oil Depot. In order to ensure the quality of the project and improve the construction progress, the construction method of CO2 semi-automatic welding and bottom cover and submerged arc welding cover was adopted in the construction of the tank bottom, and good results were obtained.
First, CO2 semi-automatic welding technology
CO2 gas shielded welding is a fusion welding method that uses the CO2 gas sprayed from the nozzle of the welding torch to block the air and protect the molten pool. The equipment is mainly composed of a welding torch, a wire feeding mechanism and a power source. Since the Soviet scholars invented the technology of melting CO2 welding in the 1950s, they have attracted many welding workers in many countries for their research and promotion of CO2 welding technology. In recent years, the NBC inverter CO2 gas shielded welder developed and produced in China has been able to inherit the advantages of conventional thyristor rectifier CO2 welding, further improving the welding stability, welding spatter, weld formation, arc radiation and welding fumes. The control is also close to the international level. In recent years, China's CO2 gas shielded welding has been increasingly promoted and applied in the field of indoor welding, but it is rarely used in field operations and pressure vessel welding.
This article was published in Metalworking, Thermal Processing, Issue 12, 2009
First, CO2 semi-automatic welding technology
CO2 gas shielded welding is a fusion welding method that uses the CO2 gas sprayed from the nozzle of the welding torch to block the air and protect the molten pool. The equipment is mainly composed of a welding torch, a wire feeding mechanism and a power source. Since the Soviet scholars invented the technology of melting CO2 welding in the 1950s, they have attracted many welding workers in many countries for their research and promotion of CO2 welding technology. In recent years, the NBC inverter CO2 gas shielded welder developed and produced in China has been able to inherit the advantages of conventional thyristor rectifier CO2 welding, further improving the welding stability, welding spatter, weld formation, arc radiation and welding fumes. The control is also close to the international level. In recent years, China's CO2 gas shielded welding has been increasingly promoted and applied in the field of indoor welding, but it is rarely used in field operations and pressure vessel welding.
This article was published in Metalworking, Thermal Processing, Issue 12, 2009
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