METHOD OF RESISTANCE BUTT-WELDING OF PIPES WITH PLUGS Russian patent published in 2007 - IPC B23K11/02 G21C21/02 

FIELD: mechanical engineering; welding; nuclear engineering.

SUBSTANCE: invention relates to manufacture of fuel elements of nuclear power stations which are sealed by resistance butt-welding. Proposed method of welding of fuel element jacket with plug comes to placing end of jacket with depression into welding equipment with preset electric resistance value and welding-in of plug into jacket wall to depth not less than twice thickness of jacket wall, with control of parameters of welding rate. Welding is carried out at rates providing distribution between areas of inner, found under jacket and outer, metal-fin forced out of butt joint of section at ratio not exceeding 3. Ratio of areas of sections of inner metal-fin arranged at two sides in any diametral section of weld joint made along its axis does not exceed two.

EFFECT: improved operation reliability of fuel elements owing to quality forming of weld joints.

1 ex, 2 dwg