METHOD FOR INDERECT WELDING OF DN 800 PIPE OF MULTIPLE FORCED CIRCULATION LOOP OF POWER UNITS WITH RBMK-1000 REACTOR PLANT

摘要

FIELD: welding.;SUBSTANCE: invention relates to a method for one-sided welding of a pressure head or suction pipeline made of pearlitic steel with a cladding of austenitic steel with a thickness of 4 mm DN 800 of a contour of multiple forced circulation of power units with a RBMK-1000 reactor installation and can be used for welding when performing repair work to correct defects in welded joints pipelines DN 800. The method includes the stage of preparation for welding by cutting edges, the stage of assembling the joint for welding, the stage of welding the joint with filling the groove by manual argon-arc welding with filler wire by performing beads and the stage of tempering.;EFFECT: ensuring the reliability of the repair of DN 800 pipelines of the RBMK-1000 multiple forced circulation loop with a significant reduction in dose loads on the repair personnel, as well as ensuring the high quality of the welded joint.;1 cl, 7 dwg