Step Expander Model SL

Designed to avoid axial stress in welded joints

Among the many applications is expanding U-tubes in welded joints on thick tube plates, whereby the tubes are expanded after welding. Automatic axial movement of the expander housing during expansion, ensures that tube elongation developed during this operation, is on the rear side of the tube plate.

The TECO SL Step Expander automatically smoothens out the overlapping during expanding. The range covered is for tubes from 3/8″ to 1 11/32″ (9-34 mm) I.D. and tube sheet thickness 2 9/16″ to 27 1/2″ (65 to 698,5 mm).; On request the expander can be supplied with Teflon bushings to prevent tube damage.