EA035458B1 - Pipe grid and method for producing same - Google Patents

Abstract

The invention relates to a pipe grid (RR) for a heater or cooler through which a heat transfer fluid can be made to flow. The pipe grid has an inflow distributor line (1), made of a first polymer material, with an inflow cross section profile (Q1) and a first length (L1), and a return flow distributor line (2), made of a second polymer material, with a return flow cross section profile (Q2) and a second length (L2). A multiplicity of connecting pipes (3-1, 3-2, …, 3-n), made of a third polymer material, with a respective connecting pipe cross section profile (Q3-1, Q3-2, …, Q3-n) and a respective third length (L3-1, L3-2, …, L3-n), extend between the inflow distributor line (1) and the return flow distributor line (2) and each fluidically connect the inflow distributor line (1) to the return flow distributor line (2).

Description

The invention relates to a pipe register adapted to be installed in a liquid heater or cooler, as well as to a method for manufacturing such a pipe register.

Pipe registers have long been known. They are used to carry out heat exchange between the coolant flowing through the pipe register, for example water, and the medium surrounding the pipe register. They can be part of a heater or cooler, usually wall-mounted.

Known pipe registers most often consist of metal, in particular steel, copper or aluminum. As a consequence, the processing of tubular or flat starting materials for the tube register, in particular when welding or brazing, requires high temperatures and correspondingly high energy consumption. In addition, these starting materials have a relatively high density, which ultimately leads to a relatively high weight of the pipe register. If such metal pipe registers are installed in a system for liquid heating or cooling, then in combination with other elements of such a system (for example, a boiler), local galvanic vapors may arise between two metals. Mention should also be made of the relatively high price of such tube-shaped raw materials.

In addition, tube registers, called capillary mats, are known, consisting of a polymeric material such as polypropylene and having a tube outer diameter typical of capillaries less than 5 mm, whereby a high flexibility is achieved. Due to their insufficient intrinsic rigidity, such capillary mats are only conditionally suitable for installation in heaters or coolers. At least the overall structural stability of such heaters or coolers with capillary mats is required by their housing or internal stiffening elements.

The invention is based on the problem of creating such a pipe register, in particular, adapted to be installed in a liquid heater or cooler, in which some or all of the above-mentioned disadvantages of pipe registers of the prior art are overcome, as well as the problem of creating a method for manufacturing such a device.

To solve this problem, according to the invention, a pipe register for a heater or a cooler is proposed, through which the heat carrier is allowed to flow, and the pipe register contains a supply distribution pipe made of a polymer material having a certain cross-sectional profile of the supply and a first length, as well as a discharge distribution pipe made of a polymer material having a certain profile of the cross-section of the branch and a second length; wherein a plurality of connecting pipes made of polymeric material, each of which has a corresponding cross-sectional profile of the connecting pipe and a corresponding third length, extend between the supply distribution pipe and the outlet distribution pipe, and fluidly connects the supply distribution pipe to the corresponding outlet distribution pipe; moreover, the connection points in which each of the connecting pipes is connected by a fluid with its first end to the supply distribution pipeline are located on the supply distribution pipeline at a distance from each other in the axial direction; and the joints, in which each of the connecting pipes is connected by a fluid with its second end to the outlet distribution pipe, are located on the outlet distribution pipe at a distance from each other in the axial direction.

The supply distribution pipe and the return distribution pipe preferably consist of the same polymeric material, preferably polypropylene (or polypropene) or polybutylene (or polybutene). In an even more preferred case, the supply distribution pipe, the return distribution pipe and the connecting pipes are made of the same polymer material, preferably polypropylene or polybutylene. This is advantageous when connecting the distribution pipes to the connecting pipes. However, with special shapes of the pipe register according to the invention (not shown), it is quite possible to use different polymeric materials for the supply distribution pipeline, the outlet distribution pipeline and connecting pipes.

The supply distribution pipe, the return distribution pipe and the connecting pipes preferably have an oxygen barrier, which is preferably located on the outer surface or on the inner surface of the distribution pipes or connecting pipes.

In a typical design, the supply distribution pipe and the return distribution pipe are of the same length (L1 = L2). In this case, the supply distribution pipe and the return distribution pipe preferably run parallel to each other, and all the connecting pipes have the same length and the same cross-sectional profile of the connecting pipes with the same free cross-sectional area. This rectangular version is suitable for numerous applications as a standard element.

- 1 035458

In a further embodiment, the supply distribution pipe and the return distribution pipe run at an angle of 5 to 120 ° to each other, and the connecting pipes have different lengths and different cross-sectional profiles of the connecting pipes with different free cross-sectional areas. This trapezoidal version is suitable as an element for special applications.

In a particularly preferred embodiment, the connection points between the supply distribution line and the connecting pipes are located on the supply distribution line eccentrically with respect to the central axis of the supply distribution line, and the connections between the outlet distribution line and the connecting pipes are located on the outlet distribution line eccentrically with respect to the central axis outlet distribution pipeline. It is possible to combine this asymmetric pipe register with other identical asymmetric pipe registers in various ways in a stack. It is possible to compose more compact or less compact stack-like combinations of tube registers, respectively, having different characteristics of radiation and convection.

To solve the above problem, the invention also provides a method for manufacturing a pipe register, in particular a pipe register according to one of the preceding paragraphs, for a heater or cooler through which a heat carrier is allowed to flow, and the pipe register contains a supply distribution pipe made of a polymer material having a certain cross-sectional profile. cross-sections of the supply pipeline and the first length, as well as the outlet distribution pipeline made of polymeric material, having a certain cross-sectional profile of the outlet pipeline and a second length; moreover, between the supply distribution pipe and the outlet distribution pipe there are a plurality of connecting pipes made of a third polymeric material having a certain cross-sectional profile of the connecting pipe and a corresponding third length, each of which fluidly connects the supply distribution pipe with the outgoing distribution pipe;

moreover, the joints in which each of the connecting pipes is connected by a fluid medium with the supply distribution pipeline by its first end are located on the supply distribution pipeline at a distance from each other in the axial direction, and the joints in which each of the connecting pipes is connected by its second end in a fluid medium with a discharge distribution pipeline, are located on the discharge distribution pipeline at a distance from each other in the axial direction, and the method includes the following operations:

a) providing a first extruded pipe of a first polymeric material having a first cross-sectional profile that is identical to the cross-sectional profile of the inlet of the supply manifold;

b) providing a second extruded pipe of a second polymeric material having a second cross-sectional profile that is identical to the cross-sectional profile of the outlet of the discharge manifold;

c) providing a third extruded pipe of a third polymeric material having a third cross-sectional profile that is identical to the cross-sectional profile of the connecting pipe;

d) cutting the first pipe section of length L1 from the first extruded pipe;

e) cutting a second pipe section of length L2 from the second extruded pipe;

f) cutting from the third extruded pipe n third pipe sections having lengths L3-1, L3-2, ..., L3-n and corresponding first and second ends of the pipe sections;

g) making n first holes in the wall of the first pipe section, which extend in the radial direction of the first pipe section and are spaced apart from each other along the axial direction of the first pipe section;

h) providing n second holes in the wall of the second pipe section, which extend in the radial direction of the second pipe section and are spaced apart from each other along the axial direction of the second pipe section;

i) connection of the first ends (3a) of the specified n third sections (ER3-1, ER3-2, ..., ER3-n) of the pipe with the specified n first holes (B1-1, B1-2, ..., B1- n) in the wall of the first pipe section (ER1-L1) to create a fluid connection between each of the third pipe sections (ER3-1, ER3-2, ..., ER3-n) and the first pipe section (ER1-L1) ;

j) connection of the second ends 3b of the indicated n third sections (ER3-1, ER3-2, ..., ER3-n) of the pipe with the indicated n second holes (B2-1, B2-2, ..., B2-p) in the wall of the second pipe section (ER2-L2) to create a fluid connection between each of the third pipe sections (ER3-1, ER3-2, ..., ER3-n) and the second pipe section (ER2-L2).

The first extruded pipe provided in step a), the second extruded pipe,

- 2,035458 provided in step b) and the third extruded pipe provided in step c) preferably have an oxygen barrier layer, which is preferably located on the outer surface or on the inner surface of the extruded pipes.

Polypropylene or polybutylene is preferably used as the polymer material.

In step g), the n first holes in the wall of the first pipe section are preferably made by drilling the stepped holes, and in step h) n second holes in the wall of the second pipe section are preferably made by drilling the stepped holes. This facilitates the correct positioning (register position) of the third pipe sections in the openings of the first and second pipe sections.

In the case of stepped holes, the hole section having a smaller diameter is preferably located on the inner, in the radial direction, side of the first pipe section or, respectively, the second pipe section and corresponds to the inner diameter of the connecting pipes, and the section of the larger diameter hole is on the outer, in the radial direction, side of the first pipe section or, respectively, of the second pipe section and corresponds to the outer diameter of the connecting pipes, and the depth of the hole section of the larger diameter corresponds to the thickness of the oxygen barrier layer. As a result, the complete removal of the oxygen barrier layer in the areas of joint of the pipe sections is ensured, which improves the quality of the welded or adhesive joint in the areas of the joint.

Preferably, the connection in step i) of the first ends of n third pipe sections with n first holes and the connection in step j) of the second ends of n third pipe sections with n second holes are made by gluing or welding.

Before step i) and before step j), the first ends and the second ends n of the third pipe sections are preferably pretreated on the outer surface of the pipe, which preferably consists in roughening the surface or abrading the surface, the depth of abrasion of the surfaces corresponding to the thickness of the oxygen barrier layer ...

The supply manifold of the pipe register preferably has a supply cross-sectional profile having a circular cross-sectional shape on its inner surface, the inner diameter of which is preferably in the range from 8 to 30 mm, even more preferably in the range from 10 to 20 mm.

The outlet manifold of the pipe register also preferably has a cross-sectional profile of the outlet having a circular cross-sectional shape on its inner surface, the inner diameter of which is preferably in the range from 8 to 30 mm, even more preferably in the range from 10 to 20 mm.

The connecting pipes preferably have a pipe cross-sectional profile having a circular cross-sectional shape on their inner surface, the inner diameter of which is preferably in the range of 5 to 15 mm, even more preferably in the range of 6 to 10 mm.

These geometrical characteristics of the interior of the distribution piping and connecting pipes allow their maximum stability under pressure and minimum hydraulic resistance.

The supply manifold of the pipe register preferably has an inlet cross-sectional profile having a circular cross-sectional shape on its outer surface, the outer diameter of which is preferably in the range of 10 to 35 mm, even more preferably in the range of 12 to 22 mm.

The outlet manifold of the pipe register also preferably has a cross-sectional profile of the outlet having a circular cross-sectional shape on its outer surface, the outer diameter of which is preferably in the range of 10 to 35 mm, even more preferably in the range of 12 to 22 mm.

The connecting pipes preferably have a pipe cross-sectional profile having a circular cross-sectional shape on their outer surface, the outer diameter of which is preferably in the range from 6 to 17 mm, even more preferably in the range from 7 to 12 mm.

These geometric characteristics of the outer part of the distribution pipelines and connecting pipes, in combination with the geometric characteristics of their inner part described above, make possible their maximum stability when exposed to pressure and minimum hydraulic resistance, while simultaneously minimizing the cost of polymer material.

The ratio of the outer diameter to the wall thickness for distribution pipes and connecting pipes is in the range from 12/1 to 4/1, even more preferably in the range from 10/1 to 6/1, in which case, in particular for connecting pipes, the ratio outside diameter to wall thickness from 9/1 to 7/1.

Alternatively, it is possible to manufacture the outer surfaces of the distribution pipes and / or connecting pipes, at least in part of their regions, with flat surface areas.

These flat partial surface areas are suitable for making adhesive joints when mounting a pipe register according to the invention in a fluid heater or cooler.

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The cross-sectional profiles of these distribution pipes and / or connecting pipes, which are at least partially flat on their outer surfaces, preferably have at least one axis of symmetry. This facilitates the profile pressing process for producing such extruded pipes.

Further advantages, features and possible applications of the invention follow from the description below, based on the figures in which FIGS. 1 is a schematic perspective view of an embodiment of a pipe register according to the invention;

fig. 2 is a schematic representation of the results of operations a) -D) a method for manufacturing a pipe register;

fig. 3 is a schematic representation of the results of steps g) and h) of a method for manufacturing a pipe register; and FIG. 4 is a schematic representation of the results of steps i) and j) of a method for manufacturing a pipe register.

FIG. 1 shows a schematic perspective view of an embodiment of an RR pipe register according to the invention. The pipe register RR contains a supply distribution pipe 1 made of a polymeric material having a cross-sectional profile Q1 of the supply cross-section and a first length L1, as well as a discharge distribution pipe 2 made of a polymeric material having a cross-sectional profile Q2 of the outlet and a second length L2.

A plurality of connecting pipes 3-1, 3-2, ..., 3-n made of polymer material, having a corresponding profile Q3-1, Q3-2, ..., Q3-, pass between the supply distribution pipeline 1 and the outlet distribution pipeline 2 n of the cross-section of the connecting pipe (in this case they are all identical and represented as Q3) and the corresponding third length L3-1, L3-2, ..., L3-n, each of which connects the supply distribution pipeline 1 with the outlet distribution pipeline 2.

Places P1-1, P1-2, ..., P1-p connections, in which each of the connecting pipes 3 with its first end 3a is fluidly connected to the supply distribution pipeline 1, are located on the supply distribution pipeline (1) at a distance from each other. from a friend in the axial direction. The joints P2-1, P2-2, ..., P2-p, in which each of the connecting pipes 3 with its second end 3b is fluidly connected to the outlet distribution pipeline 2, are also located on the outlet distribution pipeline (2) at a distance from each other in the axial direction.

In the shown schematic embodiment, the lengths L1 and L2 are identical, the lengths L3-1, L3-2, ..., L3-n are identical, the cross-sectional profiles Q1 and Q2 are identical and the distances between adjacent locations P1-1, P1-2,. .., P1-p or P2-1, P2-2, ..., P2-p connections are identical. This is typical for standard RR pipe register shapes according to the invention. In the case of particular shapes of the pipe register according to the invention (not shown), some of these mutually identical dimensions are not identical to each other.

FIG. 2 shows a schematic representation of the results of steps a) to D) of a method for manufacturing a pipe register RR according to the invention.

During step a), a first extruded pipe ER1 made of polymeric material (for example, a first polymeric material) is prepared, having a first profile that is identical to the profile Q1 of the cross-section of the supply in the supply distribution line 1.

During step b), a second extruded pipe ER2 is prepared from a polymeric material (for example, from a first or from a second polymeric material) having a second cross-sectional profile Q2, which is identical to the cross-sectional profile Q2 of the outlet in the outlet distribution pipe 2.

During step c), a third extruded pipe ER3 is prepared from a polymeric material (for example, from a first or third polymeric material) having a third cross-sectional profile Q3 which is identical to the cross-sectional profile of the connecting pipe for connecting pipes 3-1, 3-2 , ..., 3-n.

During step d), the first pipe section ER1-L1 of length L1 is cut from the first extruded pipe ER1.

During step e), the second pipe section ER2-L2 of length L2 is cut from the second extruded pipe ER2.

During operation f), n third pipe sections ER3-1, ER3-2, ..., ER3-n are cut off, having lengths L3-1, L3-2, ..., L3-n and the corresponding first and second the ends 3a, 3b of the pipe sections from the third extruded pipe ER3.

FIG. 3 shows a schematic representation of the results of steps g) and h) of a method for manufacturing a pipe register RR according to the invention.

During operation g), n first openings B1-1, B1-2, ..., B1-p are made in the wall of the first pipe section ER1-L1, which extend in the radial direction of the first pipe section ER1-L1

- 4 035458 and are spaced apart from each other along the axial direction of the first pipe section ER1-L1.

During operation h), n second holes B2-1, B2-2, ..., B2-p are performed in the wall of the second pipe section ER2-L2, which extend in the radial direction of the second pipe section ER2-L2 and are spaced apart from each other. from the other along the axial direction of the second pipe section ER2-L2.

FIG. 4 shows a schematic illustration of the results of steps i) and j) of a method for manufacturing a pipe register RR according to the invention.

During operation i), the first ends 3a n of the third sections ER3-1, ER3-2, ..., ER3-n of the pipe with n first holes B1-1, B1-2, ..., B1-p in the wall of the first pipe section ER1-L1 to create a fluid connection between each of the third pipe sections ER3-1, ER3-2, ..., ER3-n and the first pipe section ER1-L1.

During operation j), the second ends 3b n of the third sections ER3-1, ER3-2, ..., ER3-n of the pipe with n second holes B2-1, B2-2, ..., B2-p are connected the wall of the second pipe section ER2-L2 to create a fluid connection between each of the third pipe sections ER3-1, ER3-2, ..., ER3-n and the second pipe section ER2-L2.

Claims (14)

CLAIM 1. Pipe register (RR) for a heater or cooler, through which the heating medium is allowed to flow, and the pipe register contains a supply distribution pipeline (1) made of polymer material having a profile (Q1) of the supply cross-section and a first length (L1), as well as a discharge distribution pipe (2) made of polymeric material having a profile (Q2) of the cross-section of the outlet and a second length (L2); moreover, between the supply distribution pipeline (1) and the outlet distribution pipeline (2) there are a plurality of connecting pipes (3-1, 3-2, ..., 3-n) made of polymer material having a corresponding profile (Q3-1, Q3- 2, ..., Q3-n) of the cross-section of the connecting pipe and the corresponding third length (L3-1, L3-2, ..., L3-n), each of which fluidly connects the supply distribution pipeline (1) with outlet distribution pipeline (2); moreover, the places (P1-1, P1-2, ..., P1-p) of the connection, in which each of the connecting pipes (3) by its first end (3a) is fluidly connected to the supply distribution pipeline (1), are located on the supply distribution pipeline (1) at a distance from each other in the axial direction; and the places (P2-1, P2-2, ..., P2-p) of the connection, in which each of the connecting pipes (3) with its second end (3b) is fluidly connected to the outgoing distribution pipeline (2), are located on in the outlet distribution pipeline (2) at a distance from each other in the axial direction, and the places (P1-1, P1-2, ..., P1-p) of the connection between the supply distribution pipeline (1) and the connecting pipes (3) are located on in the supply distribution pipeline (1) is eccentric with respect to the central axis (M1) of the supply distribution pipeline (1), and the places (P2-1, P2-2, ..., P2-p) of the connection between the outlet distribution pipeline (2) and connecting pipes (3) are located on the outgoing distribution pipe (2) eccentrically with respect to the central axis (M2) of the outgoing distribution pipe (2). 2. Pipe register according to claim 1, characterized in that the supply distribution line (1) and the outflow distribution line (2) consist of the same polymer material, preferably polypropylene or polybutylene. 3. Pipe register according to claim 1 or 2, characterized in that the supply distribution pipeline (1), the outlet distribution pipeline (2) and the connecting pipes (3-1, 3-2, ..., 3-n) consist of the same polymeric material, preferably polypropylene or polybutylene. 4. Pipe register according to one of claims 1 to 3, characterized in that the supply distribution pipeline (1), the outlet distribution pipeline (2) and the connecting pipes (3-1, 3-2, ..., 3n) have oxygen a barrier, which is preferably located on the outer surface or on the inner surface of the distribution pipelines (1, 2) or connecting pipes (3-1, 3-2, ..., 3-n). 5. Pipe register according to one of claims 1 to 4, characterized in that the supply distribution pipeline (1) and the outlet distribution pipeline (2) have the same length L1 = L2. 6. Pipe register according to one of claims 1-5, characterized in that the supply distribution pipeline (1) and the outlet distribution pipeline (2) run parallel to each other, and all connecting pipes (3-1, 3-2, .. ., 3-n) have the same length and the same cross-sectional profile (Q3) of connecting pipes with the same free cross-sectional area. - 5 035458 7. Pipe register according to one of claims 1-5, characterized in that the supply distribution pipeline (1) and the outlet distribution pipeline (2) run at an angle of 5 to 120 ° to each other, and the connecting pipes (3-1, 3-2, ..., 3-n) have different third lengths (L3-1, L3-2, L3-n) and different profiles (Q3-1, Q3-2, ..., Q3-n) of the lateral cross-sections of connecting pipes with different free cross-sectional areas. 8. A method of manufacturing a pipe register (RR) according to one of claims 1 to 7 for a heater or cooler, through which a coolant can flow, and the pipe register contains a supply distribution pipeline (1) made of a polymer material having a cross-sectional profile (Q1) an inlet and a first length (L1), as well as an outgoing distribution pipe (2) made of a polymer material, having a cross-sectional profile (Q2) of the outlet and a second length L2; moreover, between the supply distribution pipeline (1) and the outlet distribution pipeline (2) there are a plurality of connecting pipes (3-1, 3-2, ..., 3-n) made of polymer material having a profile (Q3-1, Q3-2 , ..., Q3-n) of the cross-section of the connecting pipe and the corresponding third length (L3-1, L3-2, ..., L3-n), each of which fluidly connects the supply distribution pipeline (1) with the outlet distribution pipeline (2); moreover, the places (P1-1, P1-2, ..., P1-n) of the connection, in which each of the connecting pipes (3) with its first end (3a) is connected by fluid with the supply distribution pipeline (1), are located on the supply distribution pipeline (1) at a distance from each other in the axial direction; and the places (P2-1, P2-2, ..., P2-p) of the connection, in which each of the connecting pipes (3) with its second end (3b) is fluidly connected to the outgoing distribution pipeline (2), are located on the outlet distribution pipeline (2) at a distance from each other in the axial direction; moreover, the method includes the following operations: a) providing a first extruded pipe (ER1) of a first polymeric material having a first cross-sectional profile (Q1) that is identical to the cross-sectional profile (Q1) of the inlet of the supply manifold (1); b) providing a second extruded pipe (ER2) of a second polymeric material having a second cross-sectional profile (Q2) that is identical to the cross-sectional profile (Q2) of the outlet of the outlet manifold (2); c) providing a third extruded pipe (ER3) of a third polymer material having a third cross-sectional profile (Q3) that is identical to the cross-sectional profile of the connecting pipe for connecting pipes (3-1, 3-2, ..., 3-n) ; d) cutting the first section (ER1-L1) of the pipe with the length L1 from the first extruded pipe (ER1); e) cutting a second pipe section (ER2-L2) of a length L2 from a second extruded pipe (ER2); f) cutting off n third sections (ER3-1, ER3-2, ..., ER3-n) of pipes having lengths L3-1, L3-2, L3-n and the corresponding first and second ends (3 a, 3b) pipe sections from the third extruded pipe (ER3); g) making n first holes (B1-1, B1-2, ..., B1-p) in the wall of the first pipe section (ER1-L1), which extend in the radial direction of the first pipe section (ER1-L1) and are located on the distance from each other along the axial direction of the first section (ER1-L1) of the pipe; h) making n second holes (B2-1, B2-2, ..., B2-p) in the wall of the second pipe section (ER2-L2), which extend in the radial direction of the second pipe section (ER2-L2) and are located on the distance from each other along the axial direction of the second section (ER2-L2) of the pipe; i) connection of the first ends (3a) of the specified n third sections (ER3-1, ER3-2, ..., ER3-n) of the pipe with the specified n first holes (B1-1, B1-2, ..., B1- n) in the wall of the first section (ER1-L1) of the pipe to create a fluid connection between each of the third sections (ER3-1, ER3-2, ..., ER3-n) of the pipe and the first section (ER1-L1) of the pipe ; j) connection of the second ends (3b) of the specified n third sections (ER3-1, ER3-2, ..., ER3-n) of the pipe with the specified n second holes (B2-1, B2-2, ..., B2- n) in the wall of the second pipe section (ER2-L2) to create a fluid connection between each of the third pipe sections (ER3-1, ER3-2, ..., ER3-n) and the second pipe section (ER2-L2) ... 9. A method according to claim 8, characterized in that the first extruded pipe (ER1) provided in step a), the second extruded pipe (ER2) provided in step b), and the third extruded pipe (ER3) provided in during operation c) have an oxygen barrier layer, which is preferably located on the outer surface or on the inner surface of the extruded pipes (ER1, ER2, ER3). 10. The method according to claim 8 or 9, characterized in that during step g) n first holes (B1-1, B1-2, ..., B1-p) in the wall of the first pipe section (ER1-L1) are made by drilling stepped holes; and during operation h) n second holes (B2-1, B2-2, ..., B2-p) in the wall of the second pipe section (ER2-L2) - 6 035458 is made by drilling stepped holes. 11. The method according to claim 10, characterized in that at the stepped holes, the hole section having a smaller diameter is located on the radially inner side of the first pipe section (ER1-L1) or, respectively, the second pipe section (ER2-L2), and corresponds to the inner diameter of the connecting pipes (3-1, 3-2, ..., 3-n), and the section of the hole of the larger diameter is located on the radially outer side of the first section (ER1-L1) of the pipe or, respectively, the second section ( ER2-L2) of the pipe and corresponds to the outer diameter of the connecting pipes (3-1, 3-2, ..., 3-n), and the depth of the section of the hole having the larger diameter corresponds to the thickness of the oxygen barrier layer. 12. The method according to one of claims 8-11, characterized in that the connection during operation i) of the first ends (3 a) of said n third sections (ER3-1, ER3-2, ..., ER3-n) of the pipe with n holes (B1-1, B1-2, ..., B1-p) and the connection during operation j) of the second ends (3 b) of the indicated n third sections (ER3-1, ER32, ..., ER3- n) pipes with n holes (B2-1, B2-2, ..., B2-p) are produced by gluing or welding. 13. The method according to claim 12, characterized in that before step i) and before step j), the first ends (3a) and the second ends (3b) of said n third sections (ER3-1, ER3-2, ..., ER3 -n) the pipes are subjected to a pretreatment on the outer surface of the pipe, which preferably consists of roughening the surface or abrading the surface, the depth of surface abrasion corresponding to the thickness of the oxygen barrier layer. 14. A method according to one of claims 8 to 13, characterized in that the first polymeric material and the second polymeric material are identical polymeric materials and, in particular, the first polymeric material, the second polymeric material and the third polymeric material are identical polymeric materials.