A metallic tube structure having a longitudinal extension (L) comprising a first tubular portion having an inner surface and an outer surface , wherein the first tubular portion is made of a metal, and a sensor structure comprising at least one sensor and at least one sensor signal line , the at least one sensor being connected to the at least one sensor signal line , which at least one sensor is configured to detect a physical parameter of the first tubular portion, and which sensor structure is arranged longitudinally on at least a part of the outer surface of the first tubular portion, and a protective member ; characterised in that the sensor structure is formed as a stack of thin-film layers, wherein the stack comprises at least a first electrically insulating thin-film layer and at least one electrically conducting thin-film layer , wherein the first electrically insulating thin-film layer is mechanically bonded to the outer surface of the first tubular portion , wherein at least the first electrically insulating thin-film layer is arranged to electrically insulate the at least one electrically conducting thin-film layer from the first tubular portion , wherein the at least one sensor signal line extends along at least a part of the outer surface , wherein the at least one sensor signal line extends in the stack , and wherein at least a portion of the sensor structure is covered by the protective member , the protective member being arranged in direct contact with the portion of the sensor structure and at least a part of the first tubular portion and wherein a wall thickness of the first tubular portion is constant in a tangential direction of the first tubular portion. a first tubular portion having an inner surface and an outer surface , wherein the first tubular portion is made of a metal, and a sensor structure comprising at least one sensor and at least one sensor signal line , the at least one sensor being connected to the at least one sensor signal line , which at least one sensor is configured to detect a physical parameter of the first tubular portion, and which sensor structure is arranged longitudinally on at least a part of the outer surface of the first tubular portion, and a protective member ; characterised in that the sensor structure is formed as a stack of thin-film layers, wherein the stack comprises at least a first electrically insulating thin-film layer and at least one electrically conducting thin-film layer , wherein the first electrically insulating thin-film layer is mechanically bonded to the outer surface of the first tubular portion , wherein at least the first electrically insulating thin-film layer is arranged to electrically insulate the at least one electrically conducting thin-film layer from the first tubular portion , wherein the at least one sensor signal line extends along at least a part of the outer surface , wherein the at least one sensor signal line extends in the stack , and wherein at least a portion of the sensor structure is covered by the protective member , the protective member being arranged in direct contact with the portion of the sensor structure and at least a part of the first tubular portion and wherein the at least one sensor signal line extends along at least a part of the outer surface , wherein the at least one sensor signal line extends in the stack , and wherein at least a portion of the sensor structure is covered by the protective member , the protective member being arranged in direct contact with the portion of the sensor structure and at least a part of the first tubular portion and wherein a wall thickness of the first tubular portion is constant in a tangential direction of the first tubular portion. <EOS>