WO2015086426A1

WO2015086426A1 - Conduit, preferably fuel supply conduit

Info

Publication number: WO2015086426A1
Application number: PCT/EP2014/076575
Authority: WO
Inventors: Erwin Weh; Wolfgang Weh
Original assignee: Erwin Weh; Wolfgang Weh
Priority date: 2013-12-10
Filing date: 2014-12-04
Publication date: 2015-06-18
Also published as: DE112014005616A5; DE102013020708A1

Abstract

The invention relates to a conduit, preferably fuel supply conduit, in particular for gaseous media, preferably natural gas, preferably under high pressure preferably of up to 400 bar within the range of 150 to 400 bar, very preferably within the range of 200 to 350 bar, with at least one high-pressure hose with a first high-pressure hose end and a second high-pressure hose end; at least one connecting device at the first and/or second high-pressure hose end, wherein the connecting device comprises a hose nozzle and a pressing piece, preferably a pressing sleeve, wherein the first and/or second high-pressure hose end is clamped between connecting nozzle and pressure piece, and a sealing element is arranged between hose nozzle and a hose inner wall of the first and/or second high-pressure hose end.

Description

Line, prefers fuel supply line

The invention relates to a line, preferably a fuel supply line, in particular for gaseous media, preferably natural gas, preferably under high pressure, preferably up to 400 bar, preferably in the range of 150 to 400 bar, more preferably in the range of 200 to 350 bar and a fuel supply device comprising at least one such a line.

Such lines are used in particular in motor vehicles to fill gas in a container and from a container, in particular a

Fuel tank of a vehicle to a consumer, for example, to lead an internal combustion engine. So this line can connect all components in the high-pressure and low-pressure system. at

Low-pressure systems are referred to systems in the pressure range of 1 bar to 50 bar. The pressure in the fuel tank, in which the gaseous medium, for example natural gas or hydrogen is stored, can be up to 400 bar, with pressures in the range above 150 to 400 bar are preferred. The pressures in the tank can drop to 10 bar. In the line is then a pressure of 10 bar to 400 bar. The indicated pressures are suitable for the delivery of natural gas or hydrogen from a tank to a consumer. With the line according to the invention gaseous media, such as natural gas to be transported quickly and safely from a container to a consumer. In addition to the high pressures are a characteristic of such lines, the extreme temperature ranges in the plus and minus range of -40 ° C to + 120 ° C, especially from -40 ° C to + 85 ° C, under which the gaseous media, such as natural gas, from a container to a consumer, such as an internal combustion engine, are performed.

In the prior art were as lines, especially fuel lines, from a fuel tank to a consumer, for example a

Combustion engine, conventionally a metal fuel line, preferably selected stainless steel, in particular because of the high pressures. Another Reason for the choice of the metal lines were high demands on the

Temperature behavior, especially when thermal cycling with

Temperatures above 100 ° C are driven. A disadvantage of the previously related fuel pipes made of stainless steel was their high weight, their inflexibility and difficult installation, since the stainless steel existing fuel line had to be prefabricated always, especially if curved lines in the vehicle were required. It is therefore an object of the invention to overcome the disadvantages described above,

in particular to avoid the inflexibility of the fuel supply line from a fuel tank to a consumer and to provide a flexible line, which is characterized on the one hand by a high degree of flexibility and small bending radii. Furthermore, should a sufficient tightness in the specified

Temperature range above 100 ° C and at high pressures are provided. Furthermore, a simple manufacturability and easy assembly is desired.

According to the invention, this object is achieved by a line, in particular a fuel line, for gaseous media, preferably natural gas, preferably under high pressure, preferably up to 400 bar, in particular 10 bar up to 400 bar, in particular in the range of more than 150 bar, in particular more than 200 bar, preferably in the range above 150 to 400 bar, more preferably in the range of about 200 to 350 bar is suitable and a high-pressure hose with a first high-pressure hose end and a second high-pressure hose end, preferably made of an elastic, in particular a plastic material and at least one Connecting device on the first and / or second

High-pressure hose end, wherein the connecting device comprises a hose nozzle and a pressing piece, preferably a compression sleeve. According to the invention, the line is characterized in that the first and / or second

High-pressure hose end is clamped between connection spout and pressing piece and a sealing element between the hose nozzle and a tube inner wall of the first and / or second high-pressure hose is arranged.

To a tank system, the pressure of the gaseous medium, in particular natural gas at full tank can be 400 bar and drop to, for example, 10 bar with an empty tank.

The inventive embodiment of a line is due to the

Use of a plastic material or flexible material for the

High pressure hose the necessary flexibility of the line available.

On the other hand, it solves that when using plastic materials or

flexible materials occurring as a high-pressure hose problem of leakage of the connection of the first and / or second high-pressure hose end to the connecting device, which has, for example, a hose nozzle at high temperatures. At high temperatures, the plastic material of the

High-pressure hose end for flow and thus for leakage. This problem is solved in that a sealing element between the hose nozzle and a tube inner wall of the first and / or second

High-pressure hose end is arranged so that at temperatures above 100 ° C, in particular at about 120 ° C, leakage is counteracted. The O-ring is preferably positioned on the hose nozzle so that after the

Pressing the hose nozzle and the first and / or second

High-pressure hose end with the help of the pressing piece a high tightness is achieved without the sealing element, here the O-ring, is damaged. This is achieved according to the invention in that the pressing piece, in particular in the form of the compression sleeve, extends over the sealing element. In order to prevent that the sealing element is damaged during the pressing, it is provided that the pressing piece, in particular the pressing sleeve has a recess in the region of the sealing element.

By building the line with a pressure-tight connection of

Connecting device 20.1 with the high-pressure hose can be pressed in the Range 150 bar to 400 bar for the passed medium, preferably a gas in a temperature range from -40 ° C to + 120 ° C leakage rates of less than 1 x 10 ^"2 mbar xl / s, preferably less than 1 x 10 ^{" 4} mbar xl / s, preferably in the range of 1 x 10 ^"6 mbar xl / s to 1 x 10 ^{" 2} mbar xl / s can be achieved.

In order to ensure a pressure-tight pressing, it is furthermore preferably provided that the hose nozzle has a Christmas tree profile. The

Fir tree profile is preferred on the inner surface of the

High pressure hose optimized. The hose grommet holds together with the

Press sleeve the first and / or second high-pressure hose end. Furthermore, the hose nozzle is a seal to the hose, as well as a

Rotation. The sealing element is preferably designed in the form of an O-ring or molded seal, wherein the O-ring preferably comprises elastomers as materials. Elastomers for the sealing element include, but are not limited to, for example:

Nitrile butadiene rubber (NBR)

Hydrogenated acrylonitrile butadiene rubber (HNBR)

Fluorocarbon rubber (FKM)

Perfluoro rubber (FFKM)

Polyurethane (PU)

Chloroprene rubber (CR)

Ethylene-propylene-diene rubber (EPDM) The application of these elastomers can be carried out by various methods, such. B. by plugging, vulcanization, bonding, gluing or

Spraying.

In order to connect the line pressure-tight with the consumer or even the fuel tank, it is provided that the flexible conduit, which is used instead of a conventional stainless steel pipe, a

Sealing contour on the first and / or second high-pressure hose end includes opposite side. The Abdichtkontur example, with the mating contour, which is arranged on the fuel tank, positively connected by tightening, for example, a union nut, so that a tight connection between the fuel tank or tank container and the

Fuel line is also available at high pressures up to 400 bar. The Abdichtkontur is possible in various designs, suitable for the respective

Counterpart executed. Most preferably, a Abdichtkontur in the form of a cone, for example, a cone has been found at an angle of 20 °, which can be screwed and tightened by torque Also other connection contours, such. As a straight pipe connection or other Konturenschlüsse with different angles are possible.

The connection device or hose nozzle can also directly to a

Device, in particular a fuel supply device, for example a tank nipple, a check valve, a pressure regulator, a

Cylinder valve, a rail, a filter or a shut-off valve be attached. The hose nozzle, to which the flexible high-pressure hose is pressed by means of the pressing piece, in particular in the form of a compression sleeve, is a single piece

Device, whereby an additional screw can be saved.

This eliminates a sealing point. Furthermore, such a configuration allows the front sealing profile, for example in the form of a cone, to be dispensed with.

The high pressure hose is preferably made of a plastic material, in particular a multi-component material. For example, the high-pressure hose comprises a nylon (polyamide 6) hose core, a reinforcing layer arranged around the hose core, e.g. B. aramid fibers and arranged around the reinforcing layer protective layer. Such a hose has the advantage that it can absorb high pressures. Other advantages include cost-effective design, high temperature resistance, high flexibility, low weight and high resistance to environmental influences. In order to better protect the high-pressure hose from damage, for example against fire, falling rocks and other environmental influences, it is provided to arrange a protective hose for the high-pressure hose, which hose is designed in particular as a corrugated hose.

In addition to the line, the invention also provides a fuel supply device, in particular for gaseous media, in particular gas-powered

Motor vehicles are available, comprising a flexible conduit with a flexible high-pressure hose and a connection device to a first and / or second high-pressure hose end, wherein the connecting device a

Hose nozzle and a pressing piece includes, as well as a sealing element between hose nozzle and hose inner wall of the high-pressure hose.

The invention will be described below with reference to the drawings without

Restriction will be explained.

Show it:

Fig. 1 a cross section through a conduit according to the invention with a

Connecting device on first and second

High pressure hose end;

1 b a top view of a hose-like FIG. 1 a with a first and a second high-pressure hose end arranged connection device and protective hose;

Fig. 2a section through a connecting device with hose nozzle and

Pressing piece and sealing contour;

2b shows a three-dimensional view of a connection device;

Fig. 2c view of a connection device

Fig. 3 three-dimensional view of the high-pressure hose end

In Fig. 1 a is a section of a line according to the invention, which finds particular use as a fuel supply line and by a high flexibility and flexibility. According to the invention, the line 1 in particular for gaseous media, preferably natural gas, preferably below

High pressure preferably up to 400 bar, in particular 10 bar to 400 bar,

in particular of more than 150 bar, in particular more than 200 bar, preferably in the range of more than 150 to 400 bar, more preferably in the range of over 200 to 350 bar, a high-pressure hose 3, which preferably has a polynuclear structure as shown in Figure 3 , having.

The embodiment of the hose according to FIG. 1a comprises a

Protective tube 5, which surrounds the high-pressure hose 3 and this before

Rockfall and environmental influences protects. The protective tube 5 is as

Wave tube without limitation formed thereon. The protective tube preferably comprises polypropylene as the material and is hardly inflammable, so that it also represents a fire protection. It has a very high UV resistance. Due to the formation of a corrugated hose, a minimum bending radius of 40 mm can be used for the pipe

High pressure hose 3 and protective tube 5 can be realized.

Furthermore, according to the embodiment according to FIG. 1 a, the line comprises a at the first high-pressure hose end 10. 1 and at the second high-pressure hose end

10.2 each have a first connection piece 20.1 and a second connection piece 20.2. The first connection piece 20.1 comprises a hose nozzle 22.1 and an adjoining sealing contour 24.1. Further provided is a pressing piece 26.1, which cooperates with the hose nozzle 22.1 and connects the high pressure hose 3 at the high pressure hose end 10.1 pressure-tight to the connecting device 20.1 due to a pressing action.

The connecting device comprises a hose nozzle 22.1 with a

Christmas tree profile and a sealing profile attached in the Christmas tree profile. This embodiment is shown in more detail in FIGS. 2a-2c. The same components are assigned the same reference numerals, as in Figure 1 a to 1 b. In order to provide a pressure-tight connection between the high-pressure hose (not shown in FIGS. 2a-2c) and the connection device, the high-pressure hose can first be cut off to the required length. Then, the compression sleeve 26.1 is slipped over the high-pressure hose 3 in the region of the high-pressure hose end. After the compression sleeve has been pushed over the high-pressure hose end, the connection device with the hose nozzle 22.1 is inserted into the high-pressure hose. Subsequently, the compression sleeve 26.1 is pressed, so that the high-pressure hose end is pressed onto the Christmas tree profile of the hose nozzle. According to the invention, in order to provide a pressure-tightness over the entire temperature range from -40 ° C to + 120 ° C, a sealing element 30.1 preferably in the form of an O-ring or molded seal between the hose nozzle and the inside of the high-pressure hose end to install. The sealing element 30.1 guarantees the pressure-tight connection even if at higher

Temperatures of the high-pressure hose should flow. The sealing element 30.1 is preferably made of an elastomer, in particular without limitation thereto:

Nitrile butadiene rubber (NBR)

Hydrogenated acrylonitrilebuadiene rubber (HNBR)

Fluorocarbon rubber (FKM)

Perfluoro rubber (FFKM)

Polyurethane (PU)

Chloroprene rubber (CR)

Ethylene-propylene-diene rubber (EPDM)

With the compression according to the invention and the additional sealing element 30.1 is a pressure-tight connection at pressures preferably up to 400 bar, in particular in the range 150 to 400 bar, preferably in the range of 200 to 350 bar and in the temperature range -40 ° C to + 120 ° C. Provided. It is particularly preferred if the pressure-tight connection of

Connecting device 20.1 with the high-pressure hose a bursting pressure of at least 1040 bar, wherein the operating pressure is preferably 260 bar. Pressure-tightness is provided at the specified pressure of 260 bar in a temperature range from -40 ° C to + 120 ° C. Under pressure-tight means in the present invention that the leakage rate when using natural gas is less than 1 x 10 ^"2 mbar xl / s, preferably less than 1 x 10 ^{" 4} mbar xl / s. Such a low leakage rate is surprisingly achieved by a plurality of measures which cooperate and as

combinatorial effect lead to the low leakage rates. Thus, as shown in FIG. 2a, the pressing piece 26.1 extends in the form of a compression sleeve over the

Sealing element 30.1 away. Such a configuration makes it possible that the sealing element after pressing the compression sleeve assumes a sealing function, which can counteract leaks at temperatures above 100 ° C, in particular 120 ° C.

By introducing a recess 300 in the outer wall of the compression sleeve is achieved that a pressing of the compression sleeve does not lead to damage of the sealing element, in particular of the sealing ring 30.1. Damage to the sealing ring could namely, which in turn have leaks result. The need to introduce a sealing element to achieve the claimed leakage rates in the specified temperature range can

Table below, showing a temperature cycle test with and without

Sealing element and sealing elements of different material composition reproduced, are taken:

Table:

Comparison of the test results for a temperature cycle test without and with O-ring and achieved leakage rates

In the above table, RT indicates room temperature, HNBR an O-ring of hydrogenated acrylonitrile-butadiene rubber, and FKM an O-ring

Fluorocarbon rubber.

The temperature cycle test according to the above table was performed according to the specification of

ECE R1 10, Annex 5H. The tightness at room temperature with 10 bar and 390 bar pressure is measured before the start of the temperature cycles.

This is followed by a thermal load of 96 h at which the test specimens are subjected to a cycle duration of 120 minutes in temperature cycles between -40 ° C and + 120 ° C. After 96 h, the test samples are again checked for leaks, this time at RT, -40 ° C and + 120 ° C. As can be seen from the table could not be achieved for the embodiment without O-ring, the required tightness at high temperatures of 120 ° C. In comparison of the two versions with O-ring has also shown that the choice of material for the O-ring quite a significant role for the results after a

Playing a permanent load. The HNBR O-ring is significantly worse in the low temperature range, but can be clearly seen again at the high temperatures improve. By contrast, the FKM O-ring consistently shows very good results, which is why this material is particularly preferred for the sealing element.

The inner diameter D _inn en of the high-pressure hose is without

Limited to, preferably 5 ± 0.3 mm, the outer diameter D _aU SEN the high pressure hose preferably 8 ± 0.3 mm.

In the area of the connection device 20.1, the connection to the

To close high-pressure hose can be provided in a preferred embodiment, that on the protective tube 5 again a protective cap z. B. preferably a Gummiendmuffe or plastic clip 40.1, 40.2 is slipped. This prevents the shifting of the corrugated tube 5 on the

High-pressure hose 3. In this way, the system is completed to the outside, so that no foreign matter from the ends under the

Wave tube can get. The connecting cone 24.1 is preferably a 20 ° cone, which is inserted to the appropriate terminal to a dense

Connection in the above-mentioned sense, ie with a leak rate <1 x 10 ^"4 mbar xl / s for natural gas available.The cone 24.1 is introduced into a correspondingly shaped metallic counterpart and the union nut 50.1 with a torque of, for example 19 Nm ± 1 Nm and so the connection piece with the counterpart leak-tight connected.This results in a positive connection of the connecting piece and counterparts in the region of the connecting cone 24.1 .The counterpart to the connecting cone 24.1 is not shown here.

In the illustrated embodiment of the second high-pressure hose end 10.2 is a connection device as at the first high-pressure hose end 10.1

intended. The same components as on the side of the first high-pressure hose end 10.1 are occupied by a reference numerals supplemented by 2. Significantly too recognize the compression sleeve 26.2, the sealing ring 30.2, the connecting cone 24.2, the union nut 50.2 and the hose nozzle 22.2 in Fig. 1 a.

In Fig. 1 b is a plan view of the conduit according to the invention is shown. Same components as in Fig. 1 a are marked with the same reference numerals. Good to see is the protective tube 5 and attached via the protective tube 5 rubber stopper 40.1, 40.2 and the union nuts 50.2, 50.1, with which the inventive line, preferably as a fuel line

Use, can be connected to other components of the vehicle, such as the power or the internal combustion engine.

Although in the present case the connecting pieces which are connected to the high-pressure hose are always straight and are always connected to a component such as the fuel tank or engine by means of the union nut 50.1, other configurations of the connecting device are also conceivable without being thought deviated from the invention.

For example, as shown in Figs. 4a, 4b, 5a and 5b, the

Be performed bent connection piece. The same components as in Fig. 1 a to 1 b are assigned the same reference numerals. It would also be conceivable that the component to be connected, for example a tank nipple, check valve, a pressure regulator, a cylinder valve, a rail or a filter, already comprises the hose nozzle 22.1 with Christmas tree profile and the sealing ring 30.1 inserted into the high-pressure hose. In such a case, a sealing point is saved, namely in the region of the connecting cone or the

Sealing contour 24.1 and thus guarantees a higher reliability.

In Fig. 2a - 2c, the connection device 20.1 used in Figs. 1 a and 1 b is shown in more detail again.

Clearly visible is the compression sleeve 26.1 and the hose nozzle 22.1 with Christmas tree profile 100.1 and in a groove of the Christmas tree profile 100.1 embedded sealing element 30.1, which is presently designed as an O-ring. In the gap 102.1 between the compression sleeve 26.1 and the Tannenbaumprofil 22.1 of the high-pressure hose, not shown in FIG. 1 is introduced and connected by pressing on the Tannenbaumprofil by means of the compression sleeve 26.1 pressure-tight with the fitting 20.1.

Very crucial here is the O-shaped sealing element or sealing ring 30.1, which ensures that changes in length and flow of the high-pressure hose, for example, by temperature change, especially temperature increase, is compensated and a pressure-tight connection throughout

Temperature range of -40 ° C to + 120 ° C is guaranteed. The low leakage rates and thus the high tightness of the arrangement according to the invention can be taken from the preceding table. Furthermore, the preferred embodiment of the compression sleeve is shown in Figure 2a, which is passed over the sealing element 30.1 and in the region of the sealing element 30.1 has a recess 300 which prevents the pressing of the compression sleeve

Sealing element 30.1 is damaged. When Tannenbaumprofil the hose nozzle 22.1 stamp the projections 104.1 during pressing in the inside 202 of the high-pressure hose 10.1 and thus ensure the pressure-tight connection safely.

Good to see in Fig. 2a further the Abdichtkontur 24.1 in the form of a 20 ° - cone 1 10.1. The 20 ° cone 1 10.1 is placed in the receiving part close to the plant with a counterpart and achieved a tight connection between Abdichtkontur 24.1 and the counterpart.

Fig. 2b is a three-dimensional view of a connecting device, wherein the same components as in Fig. 1 a are designated by the same reference numerals. Clearly visible is the compression sleeve 26.1 and the union nut 50.1 with the internal thread 1 12.1. Fig. 2c shows a plan view in side view. Again, the same components are assigned the same reference numerals. Clearly visible the compression sleeve 26.2 and the nut 50.1. FIG. 3 shows in detail the view of an embodiment of a high-pressure hose 3 which is introduced into the connecting device.

The illustrated embodiment has a total of three layers, one

Tube core 200, on the inside or the inner tube wall 202, the protective sleeve in the form of the Christmas tree profile is applied and with the

Fir tree profile is compressed pressure-tight in the installed state.

The tube core 200 is made of, for example, nylon (polyamide 6). The tubular core 200 surrounds a reinforcing layer, preferably in the form of an aramid fabric 210. The aramid fabric 210 in turn is enclosed by an outer tube 220, with a tube outer wall 222 which in turn is preferably made of nylon (polyamide 6).

The exemplary high-pressure hose is merely an embodiment of a high-pressure hose and not limited thereto. The high-pressure hose shown in the embodiment has the advantage that it can absorb high pressures and has a low-cost construction. Furthermore, he shows a high

Temperature resistance, high flexibility, low weight and high resistance to environmental influences.

Finally, FIGS. 4a to 5b show embodiments of the invention

Connecting devices that are bent are shown. The hose nozzle 22.1 and the compression sleeve 26.1 surrounding the hose nozzle, the bent intermediate piece 38 and the connection contour or sealing contour 24.1 with the union nut 50.1 can clearly be seen. With those shown in Fig. 4a to 5b

Connection devices are possible with 90 ° connections and 45 ° connections. In the The connecting pieces shown in FIGS. 4a-5b are only to be understood as examples and in no way conclusive.

With the invention, a line is given for the first time, which is preferably used as a fuel supply line for gaseous media, preferably natural gas, preferably under high pressure, preferably up to 400 bar, in particular in the range of 150 to 400 bar initiated natural gas, characterized in that it firstly has a high flexibility, on the other hand, a sufficient leak-free seal flexible high-pressure hose. In particular, the invention allows connections between 0 and 180 degrees.

Claims

claims

Line (1), preferably fuel supply line, in particular for gaseous media, preferably natural gas, preferably under high pressure up to 400 bar, preferably with more than 150 bar, in particular more than 200 bar, preferably in the range of 150 to 400 bar, most preferably in the range from 200 to 350 bar with

at least one high-pressure hose (3) with a first

High pressure hose end (10.1) and a second

High pressure hose end (10.2);

at least one connecting device (20.1, 20.2) on the first and / or second high-pressure hose end (10.1, 10.2), wherein

the connecting device (20.1, 20.2) comprises a hose nozzle (22.1, 22.2) and a pressing piece (26.1, 26.2), preferably a compression sleeve,

characterized in that

the first and / or second high-pressure hose end (10.1, 10.2) between terminal spout (22.1, 22.2) and pressing (26.1, 26.2) is clamped and a sealing element (30.1) between the hose nozzle (22.1, 22.2) and a hose inner wall (202) of the first and / or second

High-pressure hose end (10.1, 10.2) is arranged.

Lead according to claim 1, characterized in that the pressing piece (26.1, 26.2) is designed such that it extends over the sealing element (30.1).

Lead according to claim 2, characterized in that the pressing piece comprises a recess (300) in a region in which the pressing piece extends over the sealing element (30.1).

Line according to one of claims 1 to 3,

characterized in that

the hose nozzle (22.1) comprises a Christmas tree profile (100.1). Lead according to one of claims 1 to 4,

characterized in that

the sealing element (30.1) is an O-ring or a molded seal, in particular an O-ring, in particular made of an elastomer, preferably one which is the following elastomers:

Nitrile butadiene rubber (NBR)

Hydrogenated acrylonitrile butadiene rubber (HNBR)

Fluorocarbon rubber (FKM)

Perfluoro rubber (FFKM)

Polyurethane (PU)

Chloroprene rubber (CR)

Ethylene-propylene-diene rubber (EPDM)

Line according to one of claims 1 to 5, characterized in that the line is designed such that in a temperature range of - 40 ° C to + 120 ° C, a leakage rate of the gaseous medium of less than 3 x 10 ^"2 mbar xl / s , preferably less than 1 x 10 ^"4 mbar xl / s, in particular in the range of 1 x 10 ^{" 6} mbar xl / s to 1 x 10 ^"2 mbar xl / s is achieved.

Line according to one of claims 1 to 6,

characterized in that

the connecting device (20.1, 20.2) further comprises a sealing contour (24.1, 24.2), preferably in the form of a cone, in particular a cone with an angle of 20 °, on which the first and / or second

High-pressure hose end (10.1, 10.2) opposite side includes.

Lead according to one of claims 1 to 7,

characterized in that

the connecting device (20.1, 20.2) further comprises a union nut (50.1, 50.2) on the first and / or second high-pressure hose end (10.1, 10.2) opposite side.

9. Line according to one of claims 1 to 8

characterized in that

the connection device (20.1, 20.2) is arranged directly on a device, in particular a part of a fuel supply device, preferably a tank nipple, a check valve, a pressure regulator, a cylinder valve, a rail, a filter.

10. Line according to one of claims 1 to 9,

characterized in that

the high-pressure hose (3) has a hose core (200), in particular made of nylon or polyamide 6, a reinforcing layer (210) arranged around the hose core (200), in particular of aramid fabric and an outer layer (220) arranged around the reinforcing layer,

in particular nylon or nylon 6.

1 1. Line according to one of claims 1 to 10,

characterized in that

the high-pressure hose (3) is enclosed by a protective hose (5), in particular a corrugated hose.

12. Fuel supply device, in particular for gaseous

Media, in particular natural gas, hydrogen-powered motor vehicles, comprising at least one line according to one of claims 1 to 11.