The tube rolling is a fundamental activity in the retubing stages of tube bundle systems.

A tube is properly expanded when it is stressed beyond its yield strength, but not beyond its ultimate tensile strength and the relative tubesheet is not stressed beyond its yield strength.

The expansion must be performed in a single solution.

The procedure provides for a uniform expansion from one end to the other of the expanded portion of the tube without grooves on the portion itself.

The crushing percentage is established by the designer/manufacturer or directly by our company on the basis of our know-how.

At the customer’s request, we are able to perform the “tube rolling” through the qualification procedures carried out on a mock-up whose extraction loads and torque values are defined. It is possible to certify the procedure by a third part.