Pipe joint, which comprises at least one first pipe section (2), and a sleeve part 5, into which the butt end part of the pipe section (2) is disposed in such a way that the sleeve part (5) extends a distance on top of the pipe section (2) from the butt end of the pipe section that is inside the sleeve, and heating means (7), such as resistance wires. For forming the joint, a joint component (3) is arranged between the outer surface (16) of at least one pipe section (2) and the inside surface (15) of the sleeve part (5), which joint component is configured to form a joint with the sleeve part (5) when the joint area is warmed with the heating means (7), and that a collar (6) is arranged on the pipe section (2), which collar comprises a detent surface (10) for the joint component (3). The invention also relates to a method for forming a pipe joint.