METHOD FOR FORMATION, INTRODUCTION AND FIXATION OF RIBS IN BOILER TUBES Russian patent published in 2014 - IPC F28F1/40 

FIELD: heating.

SUBSTANCE: invention refers to heat power engineering and can be used at manufacture of boiler tubes. A production method of boiler tubes with different inner ribbed surfaces consists in the fact that a spindle calculated as per dimensions and provided with a pass having the specified shape of outer surface is made with coiling into the pass of a wire-like element forming on it a reverse image of the specified ribbed structure of a tube. A brazing metal paste is applied onto outer surface of the wire-like element and the spindle is introduced into the tube. In order to provide adaptation of the wire-like element to inner surface of the tube, the spindle is removed from above wire-like element and the tube is heated up to fusion temperature of the brazing metal paste to connect the wire-like element to inner surface of the tube, and then, the tube is cooled.

EFFECT: simpler formation, introduction and fixation of ribs inside the tube.

10 cl, 5 dwg