FIELD: power engineering. SUBSTANCE: method involves building up iron-chromium-base material on outer shell section edges to be welded; assembling and soldering shells; providing mechanical working of edges to be welded, with built-up material being completely removed; welding outer shell; subjecting obtained telescopic joint to thermal treatment by gradual heating to 750 C plus and minus 10 C; holding for 50-70 min. Method allows hermetically sealed construction with high strength characteristics and welded joints free of cracks to be obtained. EFFECT: increased efficiency, simplified method and improved quality of joints.
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