In the thick-walled pipes, operating at high temperatures, for example, in the heat or the nuclear industry, the inner surface of the pipe, usually made of austenitic steel and the outer layer - made of steels of pearlitic class. Therefore, the welding of such pipes should be performed by combined method. This approach allows us to somewhat reduce the requirements for the assembly of joints in their preparation for welding. Along with the influence of gas environment on the stability of the welding process and consumable electrode affects the applicable welding equipment. Consequently, to ensure stability of the transition process of each drop in accordance with set for each wire diameter range of its penetration in the bath to make the selection of optimal internal diameter path to ensuring its longitudinal stiffness.
This allows us to fully exclude short-term changes of wire. To implement the processes described automatic orbital welding developed setting (automatic) UAST-1, consisting of a welding head with guide ring to move the junction, the control unit, inverter welding source and a remote control. Various versions of the orbital welding consumable electrode provides a multifunctional welding source. When designing the installation UAST-1 used a block-modular principle of design, building-block and promising unification.
This allows us to fully exclude short-term changes of wire. To implement the processes described automatic orbital welding developed setting (automatic) UAST-1, consisting of a welding head with guide ring to move the junction, the control unit, inverter welding source and a remote control. Various versions of the orbital welding consumable electrode provides a multifunctional welding source. When designing the installation UAST-1 used a block-modular principle of design, building-block and promising unification.

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