1. A
corrugated pipe of thermoplastic polymer material for use as fluid line with at least one polymer layer, comprising closed geometric outer contours which are spaced at an interval from each other in the axial direction of the pipe and which define a corrugation on the pipe jacket in at least one radial angular sector in axial, longitudinal direction one behind the other, characterized in that the closed geometric outer contours are designed in such a manner that two jacket lines of the pipe jacket surface, which lines are approximately opposite one another, are free of corrugations and that these jacket lines extend in the longitudinal direction of the pipe.
2. The corrugated pipe according to claim 1, characterized in that the corrugation-free jacket lines are opposite each other at an angle of 150-210 and especially preferably at an angle of 180.
3. The corrugated pipe according to claim 1, characterized in that the two corrugation-free jacket lines run uninterruptedly in a straight line and are parallel to the pipe axis.
4. The
corrugated pipe according to claim 1, characterized in that the two corrugation-free jacket lines are arranged in at least two axially successive sections of the corrugated pipe in different radial angular sections.
5. The corrugated pipe according to claim 1, characterized in that the two corrugation-free jacket lines run helically about the pipe axis.
6. The corrugated pipe according to claim 1, characterized in that the outer contours forming the corrugations have the form of ellipses, ovals, circles or oblong holes and are optionally flattened in individual sectors.
7. The
corrugated pipe according to claim 6, characterized in that the outer contours forming the corrugations are arranged concentrically to the pipe axis.
8. The corrugated pipe according to claim 6, characterized in that when the outer contours are designed as ellipses the large semi-axis of the small cross section is parallel to and of the same size as the small semi-axis of the large contour cross section.
9. The corrugated pipe according to claim 4, characterized in that the corrugation-free jacket-line pairs following each other in successive fashion are rotated by 20-160 relative to each other.
10. The corrugated pipe according to claim 1 which can be manufactured by extrusion or co-extrusion with subsequent suction molding or blow molding as well as by extrusion blow molding, co-extrusion blow molding or sequential blow molding with or without hose manipulation.
11. The use of corrugated pipes according to claim 1 for air-conduction parts and liquid lines in automobiles or as water lines for washing machines.
12. The corrugated pipe according to claim 2 characterized in that the two corrugation-free jacket lines run uninterruptedly in straight a line and are parallel to the pipe axis.
13. The corrugated pipe according to claim 2 characterized in that the two corrugation-free jacket lines are arranged in at least two axially successive sections of the corrugated pipe in different radial angular sections.
14. The
corrugated pipe according to claim 2 characterized in that the two corrugation-free jacket lines run helically about the pipe axis.
15. The corrugated pipe according to claim 2 characterized in that the outer contours forming the corrugations have the form elipses, ovals, circles, or oblong holes and are optionally flattened in individual sectors.
16. The corrugated pipe according to claim 4 characterized in that the outer contours forming the corrugations have the form of ellipses, ovals, circles, or oblong holes and are optionally flattened in individual sectors.
17. The corrugated pipe according to claim 7 characterized in that when the outer contours are designed as a ellipses the large semi-axis of the small cross-section is parallel to and of the same size as the small semi-axis of the large contour cross-section.
18. The corrugated pipe according to claim 6 which can be manufactured by extrusion or coextrusion with subsequent suction molding or blow molding as well by extrusion blow molding, co-extrusion blow forming or sequential blow molding with or without hose manipulation.
19. A
corrugated pipe comprising:
a thermoplastic polymer tube having at least one polymer layer, said tube defining a plurality of closed geometric outer contours which define a corrugation on the pipe surface;
said pipe surface further defining a first jacket line and a second jacket line, said jacket lines approximately opposite one another, which are free of corrugation and which extend in the longitudinal direction of the pipe.
20. A conduit comprising:
a thermoplastic pipe defining a wall having a plurality of corrugations, said wall further defining a first continuous portion of non-corrugated pipe wall, said portion extending from a first end of a pipe section to a second end of said pipe section and in an axial direction;
a second continous portion of non-corrugated pipe wall, said second portion connecting a first end of said pipe section to a second end of said pipe section, said first portion maintaining a complimentary pattern and spacing relative to said second portion.
21. The conduit according to claim 20 wherein said conduit has a first pipe section having a first orientation of a non-corrugated pipe wall portion, said first pipe section in fluid communication with a second pipe section, said second pipe section having a second orientation of a non-corrugated pipe wall portion different from said first orientation.
