CA2526332A1 - Thermoplastic corrugated pipe - Google Patents
Thermoplastic corrugated pipe Download PDFInfo
- Publication number
- CA2526332A1 CA2526332A1 CA 2526332 CA2526332A CA2526332A1 CA 2526332 A1 CA2526332 A1 CA 2526332A1 CA 2526332 CA2526332 CA 2526332 CA 2526332 A CA2526332 A CA 2526332A CA 2526332 A1 CA2526332 A1 CA 2526332A1
- Authority
- CA
- Canada
- Prior art keywords
- corrugated pipe
- sections
- pipe
- corrugated
- curvature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 229920001169 thermoplastic Polymers 0.000 title description 3
- 239000004416 thermosoftening plastic Substances 0.000 title description 3
- 239000012815 thermoplastic material Substances 0.000 claims abstract description 4
- 230000007704 transition Effects 0.000 claims description 10
- -1 polyethylene Polymers 0.000 claims 2
- 239000004698 Polyethylene Substances 0.000 claims 1
- 239000004743 Polypropylene Substances 0.000 claims 1
- 229920000573 polyethylene Polymers 0.000 claims 1
- 229920001155 polypropylene Polymers 0.000 claims 1
- 239000004033 plastic Substances 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000000463 material Substances 0.000 description 4
- 238000004904 shortening Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L11/00—Hoses, i.e. flexible pipes
- F16L11/14—Hoses, i.e. flexible pipes made of rigid material, e.g. metal or hard plastics
- F16L11/15—Hoses, i.e. flexible pipes made of rigid material, e.g. metal or hard plastics corrugated
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
The present invention relates to a corrugated pipe (1) made of a thermoplastic material which comprises an inner pipe (2) and a corrugated outer pipe (3) connected therewith, whereby the profile of the outer pipe has first sections (4) with a first average diameter, second sections (5) with a second average diameter which is greater than the first average diameter, and flanks (6) between them which connect the first sections (4) with the respectively adjacent second sections (5). The geometric ratios of the corrugated pipe (1) according to the invention are designed in such a way that not only is a high rigidity given against compressive forces acting in radial direction on the corrugated pipe and a high flexibility relative to a deformation fo the corrugated pipe diagonally to its longitudinal axis, but at the same time a low weight in comparison to conventional corrugated pipes. As a result, the plastic required for the production is reduced and the handling of the corrugated pipe is facilitated during laying.
Description
Thermoplastic Corruq_ated Pipe The present invention relates to a corrugated pipe made of a thermoplastic material.
EP 0 385 465 B2 discloses a pipe made of plastic, in particular for waster water, having a smooth inner pipe and a corrugated outer pipe connected with it which can be connected with a similar or a single-walled smooth pipe via spigot-and-socket joints.
EP 0 820 566 B1 discloses a multilayer corrugated pipe which has a smooth inner pipe, a corrugated outer pipe and a plastic layer between them.
The object of the present invention is to create an improved corrugated pipe which has a high rigidity to compressive forces acting in radial direction on the corrugated pipe and a high flexibility in relation to a deformation of the corrugated pipe diagonally to its longitudinal axis, whereby the corrugated pipe should at the same time have as low a weight as possible. The result of a low weight of the corrugated pipe is that less plastic is required during production and that handling of the corrugated pipe during laying is facilitated.
This object is solved by a corrugated pipe according to claim 1.
The dependent claims relate to advantageous embodiments of the invention.
The thermoplastic corrugated pipe according to the invention comprises an inner pipe and a corrugated outer pipe connected therewith, whereby the profile of the outer pipe has first sections with a first average diameter, second sections with a second average diameter which is greater than the first average diameter, and flanks lying between them which connect the first sections with the respectively adjacent second sections. The first sections can thereby be designated as wave troughs and the second sections, including the adjoining flanks, as wave crests.
According to the invention, the second sections, i.e. the tops of the wave crests, are curved not only in peripheral direction but also relative to the longitudinal direction of the corrugated pipe, whereby the convex side can be directed outward or inward.
The radius of curvature is thereby preferably smaller in longitudinal direction of the corrugated pipe relative to the curvature of the second sections than the outside diameter of the corrugated pipe, in particular, less than 1/6 or 1/12 of the outside diameter of the corrugated pipe. It is especially preferred if the centre of curvature is more or less on the wall of the inner pipe or in the area thereof relative to the curvature of the second sections in longitudinal direction of the corrugated pipe.
A high rigidity which is resistant to compressive forces acting in radial direction on the corrugated pipe is obtained by this design of the wave crests, since the resistance to bending of the corrugated pipe is reduced by the convex shape. At the same time, an increased flexibility with respect to a deformation of the corrugated pipe diagonally to its longitudinal axis is obtained. The convex shape of the wave crests enables an extension by lengthening the curvature on the tension side of the corrugated pipe in the bent state with less effort and more easily enables a shortening on the pressure side by a further compression of the curvature. Consequently, the walls can be made thinner due to these advantageous mechanical properties, so that the corrugated pipe according to the invention can be made considerably lighter than conventional corrugated pipes.
According to the invention, it is especially advantageous if the second sections each have a corrugated cross section relative to a section in longitudinal direction of the corrugated pipe, whereby at least one convex side is directed inward and at least two convex sides are directed outward. Due to this facilitated lengthening or shortening of these sections, the corrugated pipe can be easily bent without reducing its rigidity to compressive forces acting in radial direction on the corrugated pipe. The corrugated second sections can thereby each have at least two wave crests and at least one wave trough, especially preferred, however, three wave crests and two wave troughs.
According to the invention, it is furthermore advantageous if the transition regions between the two sections, i.e. the tops of the wave crests, and the respectively adjoining flanks are also provided with a curvature relative to the longitudinal direction of the corrugated pipe which preferably have a smaller radius of curvature than the radius of curvature of the second sections, i.e. the tops of the wave crests. The same applies to the transition regions between the first sections, i.e. the wave troughs, and the respectively adjoining flanks, whereby the radii of curvature of these transition regions should be made even smaller in order not to weaken the connection between outer and inner pipe in this area.
In order to further save material, according to the invention, it is furthermore advantageous if the wall of the corrugated pipe is smaller in the axial region of the first sections, i.e. the wave troughs, than the sum of the wall thicknesses of the second sections, i.e. the tops of the wave crests, and the wall thickness of the inner pipe in the axial region of the wave crests. It was found to be especially advantageous if the wall of the corrugated pipe in the axial region of the first sections, i.e. the wave troughs, is about 90% of this sum.
Moreover, according to the invention, to save material, it is possible that the flanks become thinner radially outward, in particular, by at least 20 - 30% relative to the flank wall which adjoins the first section up to the flank wall which adjoins the second section.
Fig. 1 shows a corrugated pipe made of a thermoplastic material according to the present invention;
Fig. 2 shows a longitudinal cross section in the area of each wave crest of a corrugated pipe according to an embodiment of the present invention;
Fig. 3 shows a longitudinal cross section in the area of each wave crest of a corrugated pipe according to a further embodiment of the present invention.
A plastic pipe 1 having a corrugated outer wall and a smooth inner wall is shown in Fig. 1 which is used, in particular, for waste water systems. Preferably, the plastic pipe 1 has a socket or connecting point 9 for connection with a further plastic pipe, whereby the connecting point 9 is sealed by a seal 10. A
reinforcing band 11 can be provided in the area of the seal 10 to prevent a creeping of the connecting point 9 in the area of the seal 10.
Fig. 2 shows a longitudinal cross section in the area of a wave crest of a corrugated pipe according to the invention having an inside diameter dl. The outer pipe has alternately wave troughs or first sections 4 and wave crests, whereby the latter consists of two flanks 6 and a second section 5, i.e. the top of the wave crest. The second sections 5 are curved relative to the longitudinal direction of the corrugated pipe with a radius of curvature R3 (relative to the outer surface of the outer pipe) which is about 1/18 relative to the outside diameter de of the corrugated pipe. The radius of curvature R3 corresponds approximately to the height e~ of a wave crest, in other words, about 1/2 of the difference between the outside diameter de and the inside diameter d; of the corrugated pipe. Thus, the centre of curvature lies on the wall of the inner pipe.
The transition region between the second sections 5, i.e. the tops of the wave crests, and the respectively adjoining flanks 6 also have a curvative relative to the longitudinal direction of the corrugated pipe according to the embodiment shown in Fig.
2, with a radius of curvature R1 relative to the outer surface of the outer pipe. The radius of curvature RZ of the transition region between the first sections, i.e. the wave troughs, and the respectively adjoining flanks is by comparison only about 1/2 R~.
To further save material for the production of the corrugated pipe, the wall e4 of the corrugated pipe of Fig. 2 is made smaller in the axial region of the first sections 4, i.e. the wave troughs, than the sum of the wall thickness e6 of the second sections and the wall thickness e5 of the inner pipe in the axial region of the wave crests (e4 < e5 + e6) . The wall of the corrugated pipe is preferably only about 90% of this sum in the axial region of the first sections 4.
Moreover, according to the invention, to save material, it is possible that the flanks 6 become thinner radially outward. In the embodiment according to Fig. 2, the flank wall which adjoins the first section tapers by about 30% toward the flank wall which adjoins the second section.
Fig. 3 shows a further embodiment of the present invention in which the second section 5 itself also has a corrugated cross section in longitudinal direction of the corrugated pipe. In the embodiment shown, the second section 5 consists of three wave crests 12 and two wave troughs 13. However, the second sections may also consist of two wave crests and one wave trough or four wave crests and three wave troughs. In the event that the corrugated pipe is deformed, the lengthening or shortening of the corrugated second sections 5 is considerably facilitated by an "accordion effect", without the rigidity to compressive forces acting in radial direction on the corrugated pipe being reduced.
In Fig. 3, the wave crests and wave troughs of the corrugated second sections each have a change in direction of about 75°
until a mathematically positive curvature changes into a mathematically negative curvature. However, changes in direction of only about 30° can also be given. However, the range between about 50° and 120°, in particular 60° to 90°, is especially preferred.
The corrugated form of the second sections 5 may also be expressed relative to the ratio of the wall thickness e6 in the second section vis-a-vis the difference in height e~ between a wave crest 12 and a wave trough 13. In the embodiment shown in Fig. 3, the ratio e~/eb is about 2, however, ratios between 1.3 and 5, in particular between 1.5 and 3, can also be provided.
It was shown that the corrugated pipe according to the present invention not only exhibits a high rigidity to compressive forces acting in radial direction on the corrugated pipe and a high flexibility relative to a deformation of the corrugated pipe diagonally to its longitudinal axis, but at the same time exhibits a lower weight in comparison to conventional corrugated pipes. The requirement for plastic is thereby reduced during production and the handling of the corrugated pipe facilitated during laying.
EP 0 385 465 B2 discloses a pipe made of plastic, in particular for waster water, having a smooth inner pipe and a corrugated outer pipe connected with it which can be connected with a similar or a single-walled smooth pipe via spigot-and-socket joints.
EP 0 820 566 B1 discloses a multilayer corrugated pipe which has a smooth inner pipe, a corrugated outer pipe and a plastic layer between them.
The object of the present invention is to create an improved corrugated pipe which has a high rigidity to compressive forces acting in radial direction on the corrugated pipe and a high flexibility in relation to a deformation of the corrugated pipe diagonally to its longitudinal axis, whereby the corrugated pipe should at the same time have as low a weight as possible. The result of a low weight of the corrugated pipe is that less plastic is required during production and that handling of the corrugated pipe during laying is facilitated.
This object is solved by a corrugated pipe according to claim 1.
The dependent claims relate to advantageous embodiments of the invention.
The thermoplastic corrugated pipe according to the invention comprises an inner pipe and a corrugated outer pipe connected therewith, whereby the profile of the outer pipe has first sections with a first average diameter, second sections with a second average diameter which is greater than the first average diameter, and flanks lying between them which connect the first sections with the respectively adjacent second sections. The first sections can thereby be designated as wave troughs and the second sections, including the adjoining flanks, as wave crests.
According to the invention, the second sections, i.e. the tops of the wave crests, are curved not only in peripheral direction but also relative to the longitudinal direction of the corrugated pipe, whereby the convex side can be directed outward or inward.
The radius of curvature is thereby preferably smaller in longitudinal direction of the corrugated pipe relative to the curvature of the second sections than the outside diameter of the corrugated pipe, in particular, less than 1/6 or 1/12 of the outside diameter of the corrugated pipe. It is especially preferred if the centre of curvature is more or less on the wall of the inner pipe or in the area thereof relative to the curvature of the second sections in longitudinal direction of the corrugated pipe.
A high rigidity which is resistant to compressive forces acting in radial direction on the corrugated pipe is obtained by this design of the wave crests, since the resistance to bending of the corrugated pipe is reduced by the convex shape. At the same time, an increased flexibility with respect to a deformation of the corrugated pipe diagonally to its longitudinal axis is obtained. The convex shape of the wave crests enables an extension by lengthening the curvature on the tension side of the corrugated pipe in the bent state with less effort and more easily enables a shortening on the pressure side by a further compression of the curvature. Consequently, the walls can be made thinner due to these advantageous mechanical properties, so that the corrugated pipe according to the invention can be made considerably lighter than conventional corrugated pipes.
According to the invention, it is especially advantageous if the second sections each have a corrugated cross section relative to a section in longitudinal direction of the corrugated pipe, whereby at least one convex side is directed inward and at least two convex sides are directed outward. Due to this facilitated lengthening or shortening of these sections, the corrugated pipe can be easily bent without reducing its rigidity to compressive forces acting in radial direction on the corrugated pipe. The corrugated second sections can thereby each have at least two wave crests and at least one wave trough, especially preferred, however, three wave crests and two wave troughs.
According to the invention, it is furthermore advantageous if the transition regions between the two sections, i.e. the tops of the wave crests, and the respectively adjoining flanks are also provided with a curvature relative to the longitudinal direction of the corrugated pipe which preferably have a smaller radius of curvature than the radius of curvature of the second sections, i.e. the tops of the wave crests. The same applies to the transition regions between the first sections, i.e. the wave troughs, and the respectively adjoining flanks, whereby the radii of curvature of these transition regions should be made even smaller in order not to weaken the connection between outer and inner pipe in this area.
In order to further save material, according to the invention, it is furthermore advantageous if the wall of the corrugated pipe is smaller in the axial region of the first sections, i.e. the wave troughs, than the sum of the wall thicknesses of the second sections, i.e. the tops of the wave crests, and the wall thickness of the inner pipe in the axial region of the wave crests. It was found to be especially advantageous if the wall of the corrugated pipe in the axial region of the first sections, i.e. the wave troughs, is about 90% of this sum.
Moreover, according to the invention, to save material, it is possible that the flanks become thinner radially outward, in particular, by at least 20 - 30% relative to the flank wall which adjoins the first section up to the flank wall which adjoins the second section.
Fig. 1 shows a corrugated pipe made of a thermoplastic material according to the present invention;
Fig. 2 shows a longitudinal cross section in the area of each wave crest of a corrugated pipe according to an embodiment of the present invention;
Fig. 3 shows a longitudinal cross section in the area of each wave crest of a corrugated pipe according to a further embodiment of the present invention.
A plastic pipe 1 having a corrugated outer wall and a smooth inner wall is shown in Fig. 1 which is used, in particular, for waste water systems. Preferably, the plastic pipe 1 has a socket or connecting point 9 for connection with a further plastic pipe, whereby the connecting point 9 is sealed by a seal 10. A
reinforcing band 11 can be provided in the area of the seal 10 to prevent a creeping of the connecting point 9 in the area of the seal 10.
Fig. 2 shows a longitudinal cross section in the area of a wave crest of a corrugated pipe according to the invention having an inside diameter dl. The outer pipe has alternately wave troughs or first sections 4 and wave crests, whereby the latter consists of two flanks 6 and a second section 5, i.e. the top of the wave crest. The second sections 5 are curved relative to the longitudinal direction of the corrugated pipe with a radius of curvature R3 (relative to the outer surface of the outer pipe) which is about 1/18 relative to the outside diameter de of the corrugated pipe. The radius of curvature R3 corresponds approximately to the height e~ of a wave crest, in other words, about 1/2 of the difference between the outside diameter de and the inside diameter d; of the corrugated pipe. Thus, the centre of curvature lies on the wall of the inner pipe.
The transition region between the second sections 5, i.e. the tops of the wave crests, and the respectively adjoining flanks 6 also have a curvative relative to the longitudinal direction of the corrugated pipe according to the embodiment shown in Fig.
2, with a radius of curvature R1 relative to the outer surface of the outer pipe. The radius of curvature RZ of the transition region between the first sections, i.e. the wave troughs, and the respectively adjoining flanks is by comparison only about 1/2 R~.
To further save material for the production of the corrugated pipe, the wall e4 of the corrugated pipe of Fig. 2 is made smaller in the axial region of the first sections 4, i.e. the wave troughs, than the sum of the wall thickness e6 of the second sections and the wall thickness e5 of the inner pipe in the axial region of the wave crests (e4 < e5 + e6) . The wall of the corrugated pipe is preferably only about 90% of this sum in the axial region of the first sections 4.
Moreover, according to the invention, to save material, it is possible that the flanks 6 become thinner radially outward. In the embodiment according to Fig. 2, the flank wall which adjoins the first section tapers by about 30% toward the flank wall which adjoins the second section.
Fig. 3 shows a further embodiment of the present invention in which the second section 5 itself also has a corrugated cross section in longitudinal direction of the corrugated pipe. In the embodiment shown, the second section 5 consists of three wave crests 12 and two wave troughs 13. However, the second sections may also consist of two wave crests and one wave trough or four wave crests and three wave troughs. In the event that the corrugated pipe is deformed, the lengthening or shortening of the corrugated second sections 5 is considerably facilitated by an "accordion effect", without the rigidity to compressive forces acting in radial direction on the corrugated pipe being reduced.
In Fig. 3, the wave crests and wave troughs of the corrugated second sections each have a change in direction of about 75°
until a mathematically positive curvature changes into a mathematically negative curvature. However, changes in direction of only about 30° can also be given. However, the range between about 50° and 120°, in particular 60° to 90°, is especially preferred.
The corrugated form of the second sections 5 may also be expressed relative to the ratio of the wall thickness e6 in the second section vis-a-vis the difference in height e~ between a wave crest 12 and a wave trough 13. In the embodiment shown in Fig. 3, the ratio e~/eb is about 2, however, ratios between 1.3 and 5, in particular between 1.5 and 3, can also be provided.
It was shown that the corrugated pipe according to the present invention not only exhibits a high rigidity to compressive forces acting in radial direction on the corrugated pipe and a high flexibility relative to a deformation of the corrugated pipe diagonally to its longitudinal axis, but at the same time exhibits a lower weight in comparison to conventional corrugated pipes. The requirement for plastic is thereby reduced during production and the handling of the corrugated pipe facilitated during laying.
Claims (19)
1. A corrugated pipe made of a thermoplastic material which comprises an inner pipe (2) and a corrugated outer pipe (3) connected therewith, whereby the profile of the outer pipe has first sections (4) with a first average diameter, second sections (5) with a second average diameter which is greater than the first average diameter, and flanks (6) between them which connect the first sections (4) with the respectively adjacent second sections (5), characterized in that the second sections (5) each have at least one curved area relative to the longitudinal direction of the corrugated pipe.
2. The corrugated pipe (1) according to claim 1, characterized in that the second sections (5) are curved in such a way relative to the longitudinal direction of the corrugated pipe that the convex side is directed outward.
3. The corrugated pipe (1) according to claim 1, characterized in that the second sections (5) are curved in such a way relative to the longitudinal direction of the corrugated pipe that the convex side is directed inward.
4. The corrugated pipe (1) according to any one of the preceding claims, characterized in that the radius of curvature (R3) is clearly smaller relative to the curvature of the second sections (5) in longitudinal direction of the corrugated pipe than the outside diameter (d e) of the corrugated pipe, in particular less than 1/6 of the outside diameter (d e) of the corrugated pipe, in particular less than 1/12 of the outside diameter (d e) of the corrugated pipe.
5. The corrugated pipe (1) according to any one of the preceding claims, characterized in that, relative to the curvature of the second sections (5) in longitudinal direction of the corrugated pipe, the radius of curvature (R3) corresponds approximately to 1/2 of the difference between the outside diameter (d e) of the corrugated pipe and the inside diameter (d i) of the corrugated pipe.
6. The corrugated pipe (1) according to claim 1 or 2, characterized in that, relative to the curvature of the second sections (5) in longitudinal direction of the corrugated pipe, the centre of curvature (R3) is situated more or less on the wall of the inner pipe (2) or in its area.
7. The corrugated pipe (1) according to claim 1 or 2, characterized in that the second sections (5) each have a corrugated cross section, whereby at least one convex side (13) is directed inward and at least two convex sides (12) are directed outward.
8. The corrugated pipe (1) according to claim 7, characterized in that the corrugated second sections (5) each have two convex sides (13) which are directed inward and three convex sides (12) which are directed outward.
9. The corrugated pipe (1) according to any one of the preceding claims, characterized in that there are second transition regions (8), having a curvature relative to the longitudinal direction of the corrugated pipe, between each of the second sections (5) and the respectively adjoining flanks (6).
10. The corrugated pipe (1) according to any one of the preceding claims, characterized in that the radius of curvature (R1) of the second transition regions (8) is greater than 1/8 of the difference between the outside diameter (d e) of the corrugated pipe (1) and the inside diameter (d i) of the corrugated pipe, in particular greater than 1/6 of this difference.
11. The corrugated pipe (1) according to any one of the preceding claims, characterized in that the radius of curvature (R1) of the second transition regions (8) is about 1/6 of the difference between the outside diameter (d e) of the corrugated pipe and the inside diameter (d i) of the corrugated pipe, in particular about 1/4 of this difference.
12. The corrugated pipe (1) according to any one of the preceding claims, characterized in that there are first transition regions (7), having a curvature relative to the longitudinal direction of the corrugated pipe, between each of the first sections (5) and the respectively adjoining flanks (6) , whereby the radius of curvature (R2) is about 1/2 of the radius of curvature (R1) of the second transition region (8) relative to the longitudinal direction of the corrugated pipe.
13. The corrugated pipe (1) according to any one of the preceding claims, characterized in that the wall of the second sections (5) or the wall of the flanks (6) is thicker than the wall of the inner pipe (2) in the axial region of the second sections (5).
14. The corrugated pipe (1) according to any one of the preceding claims, characterized in that the wall (e4) of the corrugated pipe (1) is smaller in the axial region of the first sections (4) than the sum of the wall thickness (e6) of the second sections (5) and the wall thickness (e5) of the inner pipe (2) in the axial region of the second sections (5), and, in particular, is about 90% of this sum.
15. The corrugated pipe (1) according to any one of the preceding claims, characterized in that the axial width of a wave crest, which consists of a second section (5) and two adjoining flanks (6), is about 1/10 of the outside diameter of the corrugated pipe, in particular between 1/12 and 1/8.
16. The corrugated pipe (1) according to any one of the preceding claims, characterized in that the distance between two adjacent wave crests, which each consist of a second section (5) and two adjacent flanks (6), is approximately double in comparison to the height of the wave crest, in particular between 1.5 and 2.5.
17. The corrugated pipe (1) according to any one of the preceding claims, characterized in that the flanks (6) become thinner radially outward, in particular by at least 20 - 30%, relative to the flank wall which adjoins the first section (4) up to the flank wall which adjoins the second section (5).
18. The corrugated pipe (1) according to any one of the preceding claims, characterized in that the flanks (6) are inclined by an angle (W) vis-a-vis a plane which is at a right angle to the axis of the corrugated pipe.
19. The corrugated pipe (1) according to any one of the preceding claims, characterized in that the corrugated pipe (1) is made of highly dense polyethylene or polypropylene.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102004054327.5 | 2004-11-10 | ||
| DE200410054327 DE102004054327B4 (en) | 2004-11-10 | 2004-11-10 | Corrugated pipe made of thermoplastic material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2526332A1 true CA2526332A1 (en) | 2006-05-10 |
Family
ID=36313548
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2526332 Abandoned CA2526332A1 (en) | 2004-11-10 | 2005-11-09 | Thermoplastic corrugated pipe |
Country Status (3)
| Country | Link |
|---|---|
| CA (1) | CA2526332A1 (en) |
| DE (1) | DE102004054327B4 (en) |
| IT (1) | ITTO20050789A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110410589A (en) * | 2019-07-10 | 2019-11-05 | 袁睿 | A kind of impact-resistant pipe fitting |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005001708B4 (en) * | 2005-01-13 | 2007-03-08 | Drossbach Gmbh & Co Kg | Rubber ring seal for connecting two corrugated pipes |
| DE102006018374A1 (en) * | 2006-04-20 | 2007-10-25 | Drossbach Gmbh & Co Kg | Corrugated pipe made of thermoplastic material |
| DE102006050543B4 (en) * | 2006-10-26 | 2008-08-21 | Drossbach Gmbh & Co. Kg | Device for applying plastic to a workpiece |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL8502327A (en) * | 1985-08-23 | 1987-03-16 | Wavin Bv | PLASTIC TUBE COMPRISING AN OUTDOOR HOUSING WITH RIDGES AND SMOOTH INTERIOR WALL AND METHOD FOR REPAIRING RESP. IMPROVE A SEWAGE TUBE. |
| ES2063184T5 (en) * | 1989-03-03 | 1999-09-16 | Pipelife Rohrsysteme Gmbh | PROCEDURE FOR THE MANUFACTURE OF A PLASTIC WASTEWATER DUCT. |
| ATE196351T1 (en) * | 1995-04-03 | 2000-09-15 | Uponor Innovation Ab | WAVE TUBE AND METHOD FOR PRODUCING IT |
| DE29920442U1 (en) * | 1999-11-23 | 2000-02-03 | Lupke Manfred Arno Alfred | Corrugated plastic pipe with a sleeve of the same diameter and corrugated plastic pipe product for its manufacture |
-
2004
- 2004-11-10 DE DE200410054327 patent/DE102004054327B4/en not_active Expired - Fee Related
-
2005
- 2005-11-09 CA CA 2526332 patent/CA2526332A1/en not_active Abandoned
- 2005-11-09 IT ITTO20050789 patent/ITTO20050789A1/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110410589A (en) * | 2019-07-10 | 2019-11-05 | 袁睿 | A kind of impact-resistant pipe fitting |
Also Published As
| Publication number | Publication date |
|---|---|
| ITTO20050789A1 (en) | 2006-05-11 |
| DE102004054327B4 (en) | 2009-06-25 |
| DE102004054327A1 (en) | 2006-05-24 |
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