The invention relates to a tubular element (6). The tubular element
includes a body (17) having an outer periphery surface (20) with a shape
in a cross section view such that adjacent parts of the periphery outer
surface (20) along a circumference of the tubular element (6) forms an
outer angle of at least 180.degree. in relation to each other and a first
channel (7, 9a, b) located in said body (19) adapted to transport a first
fluid medium. The tubular element includes an inner space (18) located
entirely inside of the outer periphery surface (20) of the body (19),
wherein the inner space (18) is adapted to receive at least one conduit
element (17).