VERMEISOLERANDE LEDNINGSFORBINDNINGSROR

摘要

The invention relates to a composite pipeline which can be wound on a drum, having thermal insulation between metal pipes which are corrugated uniformly in an annular manner, and are held concentrically at a distance. The invention achieves the object of permitting the production of said pipeline as well as its connection at a small cost. The achievement of the object is essentially the special construction of the profile of the annular corrugation beads of the inner and of the outer pipe and of the arrangement and design of prefabricated spacers. The composite pipeline is used for remote heating lines.