HEAT EXCHANGER MANUFACTURING METHOD Russian patent published in 2010 - IPC F28D7/10 F28F1/00 

FIELD: heating systems.

SUBSTANCE: manufacturing method of heat exchanger including zigzag-shaped heat exchange tube bank installed in housing and having external helical finning consists in arrangement of internal tube inside external one, and their combined bending. Intensifier is arranged on internal tube, intensifier-retarder with thickness which is not less than thickness of internal tube wall is placed in cavity of internal tube throughout its length with proper bearing; at that, intensifier is removed from internal and external tubes at bending point.

EFFECT: heat exchanger manufacturing method excludes microcracks when performing bends.

3 dwg