DE1988184U - IRRIGATION AND DRAINAGE PIPE MADE OF THERMOPLASTIC PLASTIC. - Google Patents
IRRIGATION AND DRAINAGE PIPE MADE OF THERMOPLASTIC PLASTIC.Info
- Publication number
- DE1988184U DE1988184U DEG39245U DEG0039245U DE1988184U DE 1988184 U DE1988184 U DE 1988184U DE G39245 U DEG39245 U DE G39245U DE G0039245 U DEG0039245 U DE G0039245U DE 1988184 U DE1988184 U DE 1988184U
- Authority
- DE
- Germany
- Prior art keywords
- irrigation
- drainage pipe
- pipe according
- pipe
- foam plastic
- 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.)
- Expired
Links
- 230000002262 irrigation Effects 0.000 title claims description 18
- 238000003973 irrigation Methods 0.000 title claims description 18
- 229920001169 thermoplastic Polymers 0.000 title description 2
- 239000004033 plastic Substances 0.000 claims description 11
- 229920003023 plastic Polymers 0.000 claims description 11
- 239000006260 foam Substances 0.000 claims description 9
- 238000007664 blowing Methods 0.000 claims description 8
- 239000012815 thermoplastic material Substances 0.000 claims description 7
- 239000004698 Polyethylene Substances 0.000 claims description 3
- -1 polyethylene Polymers 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- 208000000260 Warts Diseases 0.000 description 6
- 201000010153 skin papilloma Diseases 0.000 description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000000071 blow moulding Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000002445 nipple Anatomy 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000003351 stiffener Substances 0.000 description 1
- 239000004416 thermosoftening plastic Substances 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
- F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
- F16L11/11—Hoses, i.e. flexible pipes made of rubber or flexible plastics with corrugated wall
- F16L11/118—Hoses, i.e. flexible pipes made of rubber or flexible plastics with corrugated wall having arrangements for particular purposes, e.g. electrically conducting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
- B26F1/0015—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor specially adapted for perforating tubes
- B26F1/0053—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor specially adapted for perforating tubes by machining, e.g. cutting, grinding, projections on the tube wall
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D1/00—Producing articles with screw-threads
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D23/00—Producing tubular articles
- B29D23/18—Pleated or corrugated hoses
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
- B29C49/04—Extrusion blow-moulding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/04—Polymers of ethylene
- B29K2023/06—PE, i.e. polyethylene
- B29K2023/0608—PE, i.e. polyethylene characterised by its density
- B29K2023/0633—LDPE, i.e. low density polyethylene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2001/00—Articles provided with screw threads
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2023/00—Tubular articles
- B29L2023/005—Hoses, i.e. flexible
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2023/00—Tubular articles
- B29L2023/18—Pleated or corrugated hoses
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Description
Die Erfindung bezieht sich auf ein Be- und Entwässerungsrohr aus thermoplastischem Kunststoff, das eine vielfache Anwendung finden kann.The invention relates to an irrigation and drainage pipe made of thermoplastic material, which can be used in many ways.
Bisherige Be- und Entwässerungsrohre aus thermoplastischem Kunststoff sind stranggegossen. Sie haben eine glatte Außenmantelfläche. Zur Verbindung solcher Rohre miteinander sind besondere Muffenverbindungen erforderlich. Ihre Anwendung ist begrenzt.Previous irrigation and drainage pipes made of thermoplastic material are continuously cast. They have a smooth outer surface. Special socket connections are required to connect such pipes to one another. Their application is limited.
Die Erfindung geht von der Aufgabe aus, Be- und Entwässerungsrohre zu schaffen, die einfach herzustellen sind und eine solche Raumform aufweisen, dass sie für verschiedenartigste Anwendungen geeignet sind. Zur Lösung dieser Aufgabe wird für ein Be- und Entwässerungsrohr aus thermoplastischem Kunststoff erfindungsgemäß vorgeschlagen, dass es als Blaskörper ausgebildet ist, der seine Formgebung ausgehend von einem erhitzten Schlauch aus thermoplastischem Kunststoff in einer Blasform erhalten hat. Das Blasen von Rohren macht es möglich, dass dieses nach einem weiteren erfindungsgemäßen Merkmal an seinen beiden Enden mit beim Blasen erhaltenen Schraubgewinden versehen ist. Dadurch können in einfacher Weise die Rohre ohne Anwendung besonderer Dichtungen aneinander geschraubt werden. Weiterhin ist es nunmehr möglich, dass die Rohre in dem Bereich zwischen dem mit Schraubgewinden versehenen Enden mit beim Blasen erhaltenen Versteifungsrillen versehen sind, die entweder radial umlaufend oder diagonal verlaufend oder in Kombination beider vorgenannten Raumformen vorhanden sind.The invention is based on the task of creating irrigation and drainage pipes that are easy to manufacture and have such a spatial shape that they are suitable for a wide variety of applications. To the solution To this end, it is proposed according to the invention for an irrigation and drainage pipe made of thermoplastic material that it is designed as a blown body which has received its shape starting from a heated hose made of thermoplastic material in a blow mold. The blowing of pipes makes it possible, according to a further inventive feature, to be provided at both ends with screw threads obtained during blowing. As a result, the pipes can be screwed to one another in a simple manner without the use of special seals. Furthermore, it is now possible for the tubes in the area between the ends provided with screw threads to be provided with stiffening grooves obtained during blowing, which are either circumferential radially or diagonally or in a combination of both of the aforementioned three-dimensional shapes.
Nach einem weiteren erfindungsgemäßen Merkmal wird vorgeschlagen, dass die im Blasverfahren hergestellten Rohre in ihren Wandungen zahlreiche Durchbrechungen aufweisen, die erhalten sind aus nach außen weisenden, ausgeblasenen hohlzylindrischen Warzen, deren Köpfe abgeschnitten sind. Diese Art der Herstellung von Durchbrechungen hat den Vorteil, dass die ausgeblasenen Warzen in großer Anzahl und an vielen möglichen Bereichen des Rohrumfanges vorhanden sein könne, wobei jedoch unter Berücksichtigung des besonderen Verwendungszweckes eine Auswahl der abzuschneidenden Warzenköpfe bezüglich ihrer Anzahl und Raumanordnung vorgenommen werden kann. Soll das Rohr als Bewässerungsrohr Anwendung finden, dann werden Warzen im Bereich des unteren Bereiches des Rohres abgeschnitten. Sofern das Rohr als Entwässerungsrohr Anwendung finden soll, dann werden Warzen im oberen Bereich des Rohres weggeschnitten. Sofern auf Teilstrecken oder bei Zuleitungen keine Durchbrechungen vorhanden sein sollen, weil die Rohre als Zu- oder Ableitungen dienen sollen, dann werden entsprechend keine Warzenköpfe abgeschnitten.According to a further inventive feature, it is proposed that the tubes produced by the blow molding process have numerous perforations in their walls which are obtained from outwardly pointing, blown hollow cylindrical lugs, the heads of which are cut off. This way of making breakthroughs has the advantage that the blown out nubs can be present in large numbers and in many possible areas of the pipe circumference, but taking into account the particular purpose of use, a selection of the nipple heads to be cut off can be made with regard to their number and spatial arrangement. If the pipe is to be used as an irrigation pipe, warts are cut off in the area of the lower part of the pipe. If the pipe is to be used as a drainage pipe, warts in the upper area of the pipe are cut away. If no breakthroughs are to be present on sections of the route or in the supply lines, because the pipes are to serve as supply or discharge lines, then accordingly no wart heads are cut off.
Das erfindungsgemäße Be- und Entwässerungsrohr ist somit bei einheitlicher Grundausbildung für verschiedenste Anwendungszwecke geeignet. Durch die vorhandenen Versteifungen kann es mit vergleichsweise geringer Wandstärke ausgebildet werden.The irrigation and drainage pipe according to the invention is therefore suitable for a wide variety of uses with a uniform basic design. Due to the existing stiffeners, it can be designed with a comparatively small wall thickness.
Besonders vorteilhaft besteht das erfindungsgemäße Rohr aus einem Niederdruckpolyäthylen.The pipe according to the invention is particularly advantageously made of a low-pressure polyethylene.
Um einen geringen Materialverbrauch zu haben, wird nach einem weiteren erfindungsgemäßen Merkmal vorgeschlagen, dass das Rohr aus einem Schaumkunststoff besteht, der seine Formgebung ausgehend von einem erhitzten Schlauch aus Schaumkunststoff in einer Blasform erhalten hat. Dies wird dadurch erreicht, dass dem erhitzten und flüssigen Kunststoff Stickstoff oder Stickstoff erzeugende Materialien unter intensiver Durchmischung zugegeben werden. Dadurch wird der Schaumkunststoff gebildet. Aufgeblasen wird somit ein thermoplastischer erhitzter Schlauch aus Schaumkunststoff. Die Zellen des Schaumkunststoffes sind geschlossen.In order to have a low material consumption, it is proposed according to a further inventive feature that the tube consists of a foam plastic which has received its shape starting from a heated hose made of foam plastic in a blow mold. This is achieved by adding nitrogen or nitrogen-generating materials to the heated and liquid plastic with intensive mixing. This forms the foam plastic. A thermoplastic, heated hose made of foam plastic is thus inflated. The cells of the foam plastic are closed.
Rohre aus Schaumkunststoff haben eine sehr große Festigkeit.Foam plastic pipes have a very high strength.
Die Erfindung ist in der Zeichnung an Hand einiger Ausführungsbeispiele näher erläutert. Sie beschränkt sich nicht auf die dargestellten Ausbildungsformen, vielmehr sind weitere, im Rahmen der Erfindung liegende Abwandlungen möglich. Es zeigen:The invention is explained in more detail in the drawing using a few exemplary embodiments. It is not restricted to the forms of embodiment shown; rather, further modifications within the scope of the invention are possible. Show it:
Fig. 1 ein erfindungsgemäßes Rohr in Seitenansicht und teilweise im Schnitt,1 shows a pipe according to the invention in side view and partially in section,
Fig. 2 ein gegenüber Fig. 1 abgewandeltes erfindungsgemäßes Rohr in gleicher Ansicht,FIG. 2 shows a tube according to the invention modified compared to FIG. 1 in the same view,
Fig. 3 ein erfindungsgemäßes Rohr in Stirnansicht.3 shows a tube according to the invention in an end view.
Das Rohr 10 aus thermoplastischem Kunststoff, insbesondere Niederdruckpolyäthylen, ist als Blaskörper ausgebildet. An seinen beiden Stirnenden sind die beim Blasen erhaltenen Gewindegänge 11 vorhanden, wobei im Bereich des Gewindes am linken Ende des Rohres der Durchmesser unter Berücksichtigung der Wanddicke des Rohres größer ist als am rechten Ende des Rohres, so dass in das linke Ende ein Kopfende eines benachbarten Rohres eingeschraubt werden kann. Um eine Dichtung zu erhalten und den Betrag des Einschraubens des benachbarten Rohres auf eine maximale Länge zu begrenzen, ist am Ende der Gewinde ein nach innen vorspringender Anschlag 12 vorhanden.The pipe 10 made of thermoplastic material, in particular low-pressure polyethylene, is designed as a blown body. The threads 11 obtained during blowing are present at both of its front ends, the diameter in the area of the thread at the left end of the pipe being greater than at the right end of the pipe, taking into account the wall thickness of the pipe, so that a head end of an adjacent one enters the left end Tube can be screwed. In order to obtain a seal and to limit the amount of screwing in of the adjacent pipe to a maximum length, an inwardly projecting stop 12 is provided at the end of the thread.
Der Bereich des Rohres zwischen den beiden mit Gewinden versehenen Enden ist nach Fig. 1 mit rundumlaufenden wellenförmigen oder rinnenförmigen Verstärkungen versehen. Diese sind mit dem Blasen des Körpers erhalten. In verschiedenen Bereichen der Wandungen sind beim Blasen warzenartige hohle Vorsprünge 13 erhalten, wie das teilweise in Fig. 1 dargestellt ist. Sofern Durchbrechungen 14 für Be- oder Entwässerung erhalten werden sollen, dann werden diese Warzen 13 abgeschnitten oder abgeschliffen. Um dieses Abschneiden zu erleichtern, sind die Warzen 14 jeweils an den erhöhten Stellen vorhanden.The region of the pipe between the two ends provided with threads is provided with circumferential undulating or channel-shaped reinforcements according to FIG. 1. These are obtained with the body blowing. During blowing, wart-like hollow projections 13 are obtained in various areas of the walls, as is partially shown in FIG. 1. If openings 14 are to be obtained for irrigation or drainage, then these warts 13 are cut off or ground off. In order to facilitate this cutting off, the warts 14 are in each case present at the raised points.
Fig. 2 zeigt ein Rohr, das im Gegensatz zu dem Rohr nach Fig. 1 keine umlaufenden Verstärkungsrillen, sondern diagonal verlaufende Verstärkungsrillen aufweist, die überkreuzt angeordnet sind. Diese Versteifungsrillen einer Anordnung über Kreuz können sowohl im oberen Bereich, wie in Fig. 2 dargestellt, als auch zusätzlich im unteren Bereich vorhanden sein. Der Schnitt im linken Bereich durch das Rohr nach Fig. 2 zeigt, dass dieses nicht aus einem massiven Kunststoff, sondern aus einem Schaumkunststoff besteht.FIG. 2 shows a pipe which, in contrast to the pipe according to FIG. 1, has no circumferential reinforcing grooves, but diagonally extending reinforcing grooves which are arranged in a crossed manner. These stiffening grooves of a crossed arrangement can be present both in the upper area, as shown in FIG. 2, and also in the lower area. The section in the left-hand area through the pipe according to FIG. 2 shows that this is not made of a solid plastic, but of a foam plastic.
Das erfindungsgemäße Rohr kann somit als Drainagerohr wie auch als Leitungsrohr Anwendung finden. Vorzugsweise wird es in einem Sandbett oder Kiesbett verlegt, wobei die Dicke dieses Bettes den Anforderungen an die Entwässerung entspricht.The pipe according to the invention can thus be used as a drainage pipe as well as a conduit pipe. It is preferably laid in a bed of sand or gravel, the thickness of this bed meeting the requirements for drainage.
Claims (10)
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEG39245U DE1988184U (en) | 1968-03-27 | 1968-03-27 | IRRIGATION AND DRAINAGE PIPE MADE OF THERMOPLASTIC PLASTIC. |
| CH261469A CH486975A (en) | 1968-03-27 | 1969-02-20 | Process for the production of a pipe from thermoplastic synthetic material and pipe produced according to the process |
| FR6907161A FR2004808A1 (en) | 1968-03-27 | 1969-03-13 | Prodn of corrugated tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEG39245U DE1988184U (en) | 1968-03-27 | 1968-03-27 | IRRIGATION AND DRAINAGE PIPE MADE OF THERMOPLASTIC PLASTIC. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE1988184U true DE1988184U (en) | 1968-06-20 |
Family
ID=7126093
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEG39245U Expired DE1988184U (en) | 1968-03-27 | 1968-03-27 | IRRIGATION AND DRAINAGE PIPE MADE OF THERMOPLASTIC PLASTIC. |
Country Status (3)
| Country | Link |
|---|---|
| CH (1) | CH486975A (en) |
| DE (1) | DE1988184U (en) |
| FR (1) | FR2004808A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3125630A1 (en) * | 1981-06-30 | 1983-01-13 | Preussag Ag, 3000 Hannover Und 1000 Berlin | Well pipe, in particular consisting of plastic |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0002197A3 (en) * | 1977-11-25 | 1979-07-25 | Georg Röhl Lichttechnische Spezialfabrik Apparate- und Gerätebau GmbH & Co KG | Process for the manufacture of a venting or aerating conduit, applications of the process and pipe suitable for application of the process |
| GR77133B (en) * | 1982-03-25 | 1984-09-07 | Coats Ltd J & P | |
| TR202101823A2 (en) * | 2021-02-09 | 2021-03-22 | Oezler Teknoloji Hizmetleri Anonim Sirketi | AN AIR DUCT WITH SELF-MOUNTING PART |
-
1968
- 1968-03-27 DE DEG39245U patent/DE1988184U/en not_active Expired
-
1969
- 1969-02-20 CH CH261469A patent/CH486975A/en unknown
- 1969-03-13 FR FR6907161A patent/FR2004808A1/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3125630A1 (en) * | 1981-06-30 | 1983-01-13 | Preussag Ag, 3000 Hannover Und 1000 Berlin | Well pipe, in particular consisting of plastic |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2004808A1 (en) | 1969-12-05 |
| CH486975A (en) | 1970-03-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AT232704B (en) | Device for extrusion | |
| DE3218539A1 (en) | DOUBLE-WALLED, CORRUGATED PLASTIC PIPE | |
| DE2739236A1 (en) | FILLING BODY | |
| DE1634063B1 (en) | Draenrohr made of plastic with a smooth inner pipe wall in the axial direction and reinforcing ribs arranged in the form of a ring or screw thread on the outer pipe wall | |
| DE2600859C3 (en) | Ring slot nozzle for the production of a pipe made of thermoplastic material with longitudinal channels running perpendicular to the circular cross-section | |
| DE2739998C3 (en) | Extrusion device for the production of foamed plastic | |
| DE1480929B2 (en) | VEHICLE AIR TIRES WITH A CARCASS, THE FEDES OR WIRE OF WHICH TREAD RADIALLY IN THE SIDE WALLS AND IN THE ZENIT AREA INCLINED TO THE CIRCUMFERENCE | |
| DE1988184U (en) | IRRIGATION AND DRAINAGE PIPE MADE OF THERMOPLASTIC PLASTIC. | |
| DE2200512B2 (en) | SPACER FOR REINFORCEMENT BAR | |
| DE20321175U1 (en) | Mold core of an injection molding tool | |
| DE3815843C2 (en) | ||
| DE602004005680T2 (en) | HOLLOW PROFILE USED IN THE MANUFACTURE OF A TUBE | |
| DE2436547A1 (en) | Hollow section construction elements - have internal longitudinal ribs to provide increased resistance to bending loads | |
| DE2514278A1 (en) | Plastic pouring tube for filling containers with fluid - has end attached to canister and free end provided with outer threads | |
| EP0198073A1 (en) | Device for introducing a gas into a liquid. | |
| DE2647585A1 (en) | Concrete type drainage pipe with sheath holes - has interior hollow and holes made in single process with form cores | |
| CH437150A (en) | Thermoplastic drainage pipe | |
| DE2615420C2 (en) | Tube made from an extruded hollow strand made from thermoplastic material | |
| DE2533968B2 (en) | FROM AT LEAST TWO CONNECTED PIPE SECTIONS MADE OF THERMOPLASTIC PLASTIC PIPING FOR SEWER SEWERING SYSTEMS | |
| DE19851665C2 (en) | Process for the production of media-carrying lines using the internal gas pressure process, the injection mold used and the line produced therewith | |
| EP3978108A2 (en) | Single-piece static mixer and method for producing the same | |
| AT349035B (en) | TUBULAR SLIT FILTERS, IN PARTICULAR WELL FILTERS | |
| DE1268070B (en) | Drainpipe | |
| AT330438B (en) | ADJUSTABLE SUPPORT, ESPECIALLY FOR SHELLING AND BUILDING FRAMES | |
| AT323653B (en) | TANK MADE FROM THERMOPLASTIC PLASTIC |