Since the early 1980s, SFZ abandonned the process of molting in favour of hydroforming.


This process of bellows forming consists in deforming metallic shells plastically under the pressure of water. A constant and uniform stress enables forming regular bellows with low mechanical constraints.

SFZ hydroforms bellows made of stainless steel, nickel alloys and aluminium depending on your requirements and constraints. Our expansion joints are equipped with single or multi-layer bellows (up to 4 layers). The range of our products varies between thickness of 0,3 mm to 5 mm.


Our presses and hydraulic equipment dedicated to hydroforming can cover a range extending to diameters of 5000 mm.