A heat insulation pipe includes an inner pipe and an outer pipe. The inner pipe includes a pair of inner pipe members spaced apart from each other in an axial direction of the inner pipe, a first bellows disposed between the pair of inner pipe members, and a restriction mechanism for restricting expansion and contraction of the inner pipe in the axial direction to a predetermined range. The restriction mechanism is slidable with respect to at least one of a pair of bulging portions. The outer pipe includes a pair of outer pipe members each including a second bellows, and a second cylindrical portion housing the first bellows and the restriction mechanism.

A heat insulation pipe includes an inner pipe and an outer pipe. The inner pipe includes a pair of inner pipe members spaced apart from each other in an axial direction of the inner pipe, a first bellows disposed between the pair of inner pipe members, and a restriction mechanism for restricting expansion and contraction of the inner pipe in the axial direction to a predetermined range. The restriction mechanism is slidable with respect to at least one of a pair of bulging portions. The outer pipe includes a pair of outer pipe members each including a second bellows, and a second cylindrical portion housing the first bellows and the restriction mechanism.

According to various embodiments, a multi-axis compensator comprises: a first mounting device and a second mounting device; a passage which penetrates the first mounting device and the second mounting device along a compensator axis; multiple membrane bellows disposed one behind the other along the compensator axis, of which a first membrane bellows is coupled to the first mounting device and a second membrane bellows is coupled to the second mounting device; at least one bellows coupler which couples the first membrane bellows to the second membrane bellows in such a way that the first membrane bellows and the second membrane bellows run at an angle to each other, so that a passage through the multi-axis compensator, which is curved or angled along the compensator axis, is provided.

According to various embodiments, a multi-axis compensator comprises: a first mounting device and a second mounting device; a passage which penetrates the first mounting device and the second mounting device along a compensator axis; multiple membrane bellows disposed one behind the other along the compensator axis, of which a first membrane bellows is coupled to the first mounting device and a second membrane bellows is coupled to the second mounting device; at least one bellows coupler which couples the first membrane bellows to the second membrane bellows in such a way that the first membrane bellows and the second membrane bellows run at an angle to each other, so that a passage through the multi-axis compensator, which is curved or angled along the compensator axis, is provided.