EP3433524A1 - Connecting element for gas-tight connection with other components for piping systems - Google Patents
Connecting element for gas-tight connection with other components for piping systemsInfo
- Publication number
- EP3433524A1 EP3433524A1 EP17722653.7A EP17722653A EP3433524A1 EP 3433524 A1 EP3433524 A1 EP 3433524A1 EP 17722653 A EP17722653 A EP 17722653A EP 3433524 A1 EP3433524 A1 EP 3433524A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- connecting element
- gas
- tight connection
- pipeline system
- further component
- 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.)
- Withdrawn
Links
- 238000000576 coating method Methods 0.000 claims abstract description 42
- 239000011248 coating agent Substances 0.000 claims abstract description 39
- 238000007789 sealing Methods 0.000 claims abstract description 19
- 229910052751 metal Inorganic materials 0.000 claims abstract description 9
- 239000002184 metal Substances 0.000 claims abstract description 9
- 229910001092 metal group alloy Inorganic materials 0.000 claims abstract description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 16
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 229910000838 Al alloy Inorganic materials 0.000 claims description 6
- 230000005294 ferromagnetic effect Effects 0.000 claims description 4
- 238000005137 deposition process Methods 0.000 claims 1
- 229910052734 helium Inorganic materials 0.000 claims 1
- 239000001307 helium Substances 0.000 claims 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims 1
- 238000007747 plating Methods 0.000 claims 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 23
- 229910052759 nickel Inorganic materials 0.000 description 12
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 6
- 229910052802 copper Inorganic materials 0.000 description 6
- 239000010949 copper Substances 0.000 description 6
- 229910052698 phosphorus Inorganic materials 0.000 description 6
- 239000011574 phosphorus Substances 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 238000005520 cutting process Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 230000005291 magnetic effect Effects 0.000 description 3
- 239000003566 sealing material Substances 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005468 ion implantation Methods 0.000 description 1
- 229910001234 light alloy Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 150000002815 nickel Chemical class 0.000 description 1
- 238000010943 off-gassing Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium 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
- F16L23/00—Flanged joints
- F16L23/02—Flanged joints the flanges being connected by members tensioned axially
- F16L23/032—Flanged joints the flanges being connected by members tensioned axially characterised by the shape or composition of the flanges
-
- 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
- F16L23/00—Flanged joints
- F16L23/16—Flanged joints characterised by the sealing means
-
- 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
- F16L23/00—Flanged joints
- F16L23/16—Flanged joints characterised by the sealing means
- F16L23/18—Flanged joints characterised by the sealing means the sealing means being rings
- F16L23/20—Flanged joints characterised by the sealing means the sealing means being rings made exclusively of metal
Definitions
- the invention is directed to a connecting element for gas-tight connection with a further component of a pipeline system and a method for its production.
- Typical flange systems are Conflat flanges (CF flanges) according to ISO / TS 3669-2: 2007. These flanges are designed for vacuum applications at temperatures up to 450 ° C. For pipelines for low temperatures (4 K), high temperatures (300 ° C) and / or high pressures (up to 500 bar) to typically 1 "(25.4 mm) diameter, eg VCR® connections with metallic sealing washers are used made of elastomer or plastic can not be used in these applications (low temperatures: no reliable sealing, high temperatures: destruction of the seal, high pressure: not stable enough, generally: gas permeability too high)
- Gas supplies are used metallic gaskets.
- Sealing materials made of copper, nickel and stainless steel are used as sealing material. In order to obtain the necessary strength in the area of the seal, flanges and
- flanges and tubes made of aluminum and aluminum alloys are advantageous.
- Aluminum is easily machinable, non-magnetic, can be extruded, has high thermal conductivity and is made by radioactive radiation only little activated.
- aluminum exits less than steel and less "pollutes" the vacuum.
- flanges are used which typically have a hard side made of stainless steel and for the most part consist of aluminum (US5836623). This system is difficult to manufacture (e.g.
- flanges made of aluminum which have a sealing surface which is hardened by means of ion implantation (DE29918170).
- the sealing surface can be coated with diamond-like carbon. Disadvantages of this method are high production costs, low wear resistance due to the small layer thickness, the low temperature stability of 150 ° C and the commonly used
- connection element described in claim 1 The object is achieved by the connection element described in claim 1 and by the method described in claim 13 for its preparation.
- Connecting element made of light metal or a light alloy is made of light metal or a light alloy.
- the light metal is aluminum or an aluminum alloy.
- connection is cheaper to produce.
- connection is a detachable connection.
- the connecting element is a flange.
- Gas-tight pipe flange connections are used in vacuum technology for many
- the flange according to the invention consists of an aluminum alloy with an aluminum content of at least 50%, preferably at least 60% and particularly preferably at least 80%. Flanges made of this material are simpler and thus less expensive to produce than their production, for example made of steel.
- Aluminum has a lower specific gravity than steel and is therefore easier to handle. In addition, it has a high thermal conductivity (important if the system is heated up to 200 ° C or a high heat transfer is beneficial).
- the outgassing rate under ultra-high vacuum conditions is also lower than that of steel, so the vacuum is less "contaminated".
- this coating is according to the invention a nickel-based coating. Coatings are nickel-based
- the coatings can be applied in different ways.
- the nickel-based coating has no ferromagnetic properties.
- This nickel coating can be one
- the nickel-based coating can be composed of several individual layers.
- the layers can be applied both galvanically and chemically and by the precise control of the
- Layer construction may have properties such as hardness, surface accuracy and
- Wear resistance can be varied specifically.
- the magnetic properties of the coating can be controlled in addition to the hardness. With increasing Phosphorus content decreases the hardness of the coating.
- a nickel-based coating with a phosphorus content of 5 wt.% Has a hardness of 600 HV 0, 1, with 13 wt.% Phosphor only a hardness of 500 HV 0, 1.
- the function of the coating is to increase the hardness in the region of the seal and thus the distribution of the sealing force over a larger area of the softer base material of the connecting element. Therefore, in a development of the invention, only the area of the sealing surface is coated. For reasons of production, however, a larger area can also be coated.
- the metallically hard coating has a layer thickness of at least 25 ⁇ m.
- the coating has a thickness of 30 ⁇ , particularly preferably a layer thickness of at least 50 ⁇ .
- the connecting element according to the invention has a high thermal stability. Ultra high vacuum aluminum systems are heated up to 200 ° C. The nickel-based coating is long-term stable under these temperatures. An interdiffusion or
- the connecting element according to the invention has a high mechanical
- Strength tensile strength Rm greater than 150 MPa, so that it does not deform under high heat.
- the strength of pure aluminum is typically about 70 MPa.
- the metallically hard layer can be applied to the connecting element according to the invention
- the metallic hard layer may also be applied by a pulse deposition method.
- the voltage is thereby pulsed, thereby the structure of the layer can be controlled within wide ranges and the hard layer can be adjusted to the desired values.
- the Happy-Plating-Rampart method ⁇ can also be used. In this
- Pulsabscheidevon complex layer systems can be applied.
- the layer thickness is applied evenly at the edges.
- Fig. 1 is a cross-sectional view of a compound according to the invention of two flanges with pipe socket
- Fig. 2 is a cross-sectional view of a flange according to the invention of a flange with pipe socket and a blind flange
- Figure 1 shows a pipe connection according to the invention from the side, which are interconnected by means of a union nut and screw.
- This compound is typically used for gas supplies and high purity gases (brand name VCR ⁇ Swagelock).
- the pipe diameter is up to 1 "(25.4 mm), and larger pipe diameters can be achieved with other union connectors or other flanges.
- the main body of the flange with pipe socket 1, 1 ' consists of an aluminum alloy, e.g. AW-6060th This alloy is widely used in these applications, it is very weldable with a tensile strength of 240 N / mm2.
- the sealing disc 3 is made of aluminum or copper. Their thickness depends on the diameter 1 to 2 mm.
- the nickel-based coating 2, 2 ' is applied to the areas that are in contact with the seal.
- the coating has a thickness of 50 to 60 ⁇ and is applied with the Happy-Plating-Rampart method ⁇ . This results in a multicrystalline layer with a hardness of 500 HV 0.1.
- the tubes may be coated completely or over a wider area, which may provide additional protection against corrosion.
- FIG. 2 shows the connection surface of a connecting element 1 according to the invention for connection to further components 1 ', 5 of a pipeline system.
- the coating 2 extends only over the contact area, which comes into contact with a seal 3.
- the Ni-base alloy coating 2 is made by the Happy-Plating-Rampart method
- Figure 3 shows a flange connection according to the invention in cross section, as used in ultra high vacuum applications (pressures less than 10-9 mbar) is used.
- the flange 1 with a pipe socket consists of the aluminum alloy 6082-T6 with a tensile strength of more than 300 N / mm2. Flange and pipe socket can be made in one piece or welded together.
- the pipe socket has a sealing edge for metal seals (according to ISO 3669-2).
- the flange 5 is designed in this embodiment as a blind flange.
- the metal seal 3 typically consists of oxygen-free copper with a hardness of about 65 HB or soft annealed copper (about 45 HB). Aluminum seals are rarely used.
- the flanges 1 and 5 are provided with a nickel-based coating at least in the region of the cutting edge.
- the coating in this embodiment has a phosphorus content of greater than 9% and is therefore not ferromagnetic.
- the coating can be applied only in the region of the cutting edge to further reduce the magnetic influences.
- the coating is then annular with a width of about 4 mm.
- the nickel-based coating has a thickness of 50 to 100 ⁇ and was applied by the Happy-Plating-Rampart method ⁇ .
- the hardness is 500 HV 0, 1.
- the coating is free of stress and pores and seals reliably even at high temperatures of up to 200 ° C.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102016105168.3A DE102016105168A1 (en) | 2016-03-21 | 2016-03-21 | Connecting element for gas-tight connection with other components for piping systems |
PCT/DE2017/100208 WO2017162235A1 (en) | 2016-03-21 | 2017-03-15 | Connecting element for gas-tight connection with other components for piping systems |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3433524A1 true EP3433524A1 (en) | 2019-01-30 |
Family
ID=58698890
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17722653.7A Withdrawn EP3433524A1 (en) | 2016-03-21 | 2017-03-15 | Connecting element for gas-tight connection with other components for piping systems |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3433524A1 (en) |
DE (1) | DE102016105168A1 (en) |
WO (1) | WO2017162235A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11125373B2 (en) * | 2018-03-07 | 2021-09-21 | The Rendely Connection | Structural connection between in-line pipes and tubes |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5836623A (en) | 1996-09-20 | 1998-11-17 | Bothell; Richard D. | Connector system for use in ultra-high vacuum systems |
DE29918170U1 (en) | 1999-10-08 | 2000-02-03 | Deutsches Elektronen Synchr | Flange for use in the field of ultra high vacuum technology |
AT506583B9 (en) * | 2008-10-23 | 2009-12-15 | Happy Plating Gmbh | ELECTROCHEMICAL COATING PROCESS |
WO2013133762A1 (en) * | 2012-03-08 | 2013-09-12 | Swedev Ab | Electrolytically puls-plated doctor blade with a multiple layer coating |
-
2016
- 2016-03-21 DE DE102016105168.3A patent/DE102016105168A1/en not_active Withdrawn
-
2017
- 2017-03-15 WO PCT/DE2017/100208 patent/WO2017162235A1/en active Application Filing
- 2017-03-15 EP EP17722653.7A patent/EP3433524A1/en not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
DE102016105168A1 (en) | 2017-09-21 |
WO2017162235A1 (en) | 2017-09-28 |
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Legal Events
Date | Code | Title | Description |
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17P | Request for examination filed |
Effective date: 20181113 |
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AK | Designated contracting states |
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Extension state: BA ME |
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DAV | Request for validation of the european patent (deleted) | ||
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18D | Application deemed to be withdrawn |
Effective date: 20191001 |