Abstract: A method and apparatus are provided for joining tubes. The tubes have ends which are deformed within sleeves having an interior channel by applying pressure to the tube end portion, a mandrel being temporarily placed within the tube and sockets being fitted on the exterior of the tube, pressure being applied to the end portion of the tube to cause the wall of said tube to deform in the area of the sleeve channels to anchor the tube in the sleeve. After the mandrel and the sockets are removed, the sleeve is clamped in the joint member with a nut which is screwed onto it.