FIELD: heating.
SUBSTANCE: at manufacture of a gas air cooling unit, manufacture and installation of heat exchange sections with heat exchange tubes, gas supply and discharge headers and a supporting structure of the unit is performed. Connection of heat exchange tubes to a header is made through horizontal and inclined combs; with that, X-shaped edge preparation for welding is made in the horizontal comb; V-shaped edge preparation for welding is made in the inclined comb; the horizontal comb is welded to the header; a rectangular cavity is made on the horizontal comb from the contact point of the comb and the header; the inclined comb is tack welded to the header; a comb installation device is removed; the inclined comb is welded to the header; heat treatment and air cooling is performed; holes are drilled in combs; ends of heat exchange tubes are inserted into holes of the combs; ends of heat exchange tubes are welded in the holes of the combs; heat exchange sections are assembled.
EFFECT: simpler connection of heat exchange tubes and the header.
6 dwg
