Brugg Rohr Ag Holding

Alfred Oeschger

Christian Dambowy

Roberto Rudi

Jürgen Kress

Juergen Kress

For manufacturing composite parts () having an inner hollow moulded body () with openings (), which are accessible from outside, the moulded body is introduced into a moulding tool on the mould walls on which a shell layer () was applied. The hollow space between the moulded body () and the shell layer () is filled with a thermally insulating plastic foam () which is foamed in the moulding tool and bonds to the moulded body and the shell layer. After removal, a moulded body is provided, which has a qualitatively good surface formed by the shell layer. Such a composite part is preferably used for connecting thermally insulating pipes.

Method for manufacturing a composite part and use thereof

The invention relates to a corrugated, thermally insulated conduit for fluids, e.g. for district heating networks, wherein at least one medium pipe () made of plastic or metal is surrounded by a thermal insulation layer (), consisting of a polyurethane foam for example. The corrugation () of the outer jacket () made of plastic is formed such that both the corrugation valleys () and the corrugation peaks () are round, particularly circular. In addition, the corrugation is dimensioned such that the corrugation depth T lies in a range of 4.5 mm to 8 mm for a conduit outer diameter range of 63 mm to 202 mm. This shaping and dimensioning of the conduit results in very good flexibility and thus the ability to roll up the pipe for the transport thereof.

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Wil, Switzerland

Alfred Oeschger