SETT ATT MEKANISKT AVLEGSNA DRAGSPENNINGAR I ETT ROR, SOM TIDIGARE ANBRAGTS I EN URBORRNING I EN VEGG GENOM INVENDIG VALSNING AV RORET

摘要

A tube which has been expanded in a support such as the tube-sheet of a heat exchanger is subjected to diametral deformation of controlled intensity and direction in the transition zone between the expanded portion of the tube and the portion which has a nominal diameter by means of an axially displaceable and radially expandable tool having a bullet-nosed shape or by means of a tube-expander of the type comprising a mandrel fitted with rollers or by means of a fluid under pressure.