WO1987001428A1 - Method for connecting together lengths of pipe in addition to join and lengths of pipe manufactured with said method - Google Patents

Method for connecting together lengths of pipe in addition to join and lengths of pipe manufactured with said method Download PDF

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Publication number
WO1987001428A1
WO1987001428A1 PCT/NL1986/000029 NL8600029W WO8701428A1 WO 1987001428 A1 WO1987001428 A1 WO 1987001428A1 NL 8600029 W NL8600029 W NL 8600029W WO 8701428 A1 WO8701428 A1 WO 8701428A1
Authority
WO
WIPO (PCT)
Prior art keywords
pipe
pipe length
lengths
wall
length
Prior art date
Application number
PCT/NL1986/000029
Other languages
French (fr)
Inventor
Franciscus Cornelis Terhoeve
Original Assignee
Allseas Engineering B.V.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from NL8502610A external-priority patent/NL8502610A/en
Application filed by Allseas Engineering B.V. filed Critical Allseas Engineering B.V.
Priority to GB08710512A priority Critical patent/GB2189562B/en
Publication of WO1987001428A1 publication Critical patent/WO1987001428A1/en

Links

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
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
    • F16L55/1608—Devices for covering leaks in pipes or hoses, e.g. hose-menders by replacement of the damaged part of the pipe
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/06—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes in openings, e.g. rolling-in
    • B21D39/066—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes in openings, e.g. rolling-in using explosives
    • 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
    • F16L13/00—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints
    • F16L13/14—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling
    • F16L13/16—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling the pipe joint consisting of overlapping extremities having mutually co-operating collars

Definitions

  • the invention relates to a method in accordance with the preamble of claim 1.
  • Connecting pipe lengths with flanges requires the presence of these flanges at the pipe length ends and lying precisely within the scope of the objective of the current invention is the attachment, for example, of a pipe length provided with a flange to a flangeless pipe length, following which the previously flangeless pipe length with the flange fitted onto it can be coupled to a flange of an existing pipeline.
  • the invention has for its purpose to provide a method of the type referred to in the preamble which can be performed with tooling that is small in bulk and weight in places difficult of access and of which the manufactured join, if required, permits a considerable axial tensile force between the pipe lengths and which does not lead to fatigue cracks in one or both of the connected pipe lengths and/or to damaging of the coatings.
  • the invention also relates to and provides a join ; and pipe lengths manufactured as in the method according to the invention which are constructed for application in the method according to the invention.
  • the current invention does not exclude the plastic deformation of a first (thick) wall part by an explosion in accordance with the essential insight of the current invention, nor does it exclude the melting of a second (thin) wall part by explosion of a charge of the same order of magnitude for welding onto another pipe length.
  • the charge used for the welding with respect to the small wall thickness is of another order of magnitude than the charge * used for the plastic deformation with respect to the large wall thickness.
  • fig. la, lb and lc and 2a, 2b and 2c show three successive situations in the application of the two different methods according to the invention
  • fig. 3a, 4 and 6 each show a variant of fig. la
  • fig. 3b is a section corresponding with fig. 3a in the situation after performing the method according to the invention
  • fig. 5 shows on a larger scale a variant of a longitudinal section through a fraction of a join according to the invention.
  • the outer diameter of pipe length 1 is the same as the inner diameter of pipe length 2 which amounts to e 2 > this value e 2 being essentially greater than the diameter e j _, since the wall 12 of pipe length 2 is elastically deformed through the pressure applied to it by the wall 11 of pipe length 1. Under the influence of the explosion the- wall 11 is however deformed (expanded) not only over a diameter increase of e 2 -e 1 but also over the diameter increase e j -d ⁇ , this deformation being too great for an elastic deformation so that due to excessive deforming the state of plastic deformation of the wall 11 in fig. lb results.
  • the coating layer 51 of pipe length 1 has on its inner side a thin walled, axially extending bridging ring of the same coating material.
  • this bridging ring 5 because it is thin walled, is
  • a cylindrical cartridge 24 with explosive material built up of for example three segments is arranged inside a robust housing 25 around a pipe length 21 which is placed around a pipe leng-th 22 with a clearance g i ⁇ f i. '
  • the pipe lengths 21 and 22 each have an interior coating layer 51.
  • the end of the pipe length 22 is moreover provided inside and outside with a vapour deposited layer which forms a bridging ring 23.
  • the practical embodiment variant of fig. 3a shows a first pipe length 41, which is for example the end of a long underwater pipe, and which has to be provided with a flange 10.
  • a pre-processed pipe length 42 according to the invention is provided with the required flange 10 for coupling to for example another pipe (not drawn).
  • This pipe length 42 is placed onto the pipe length 41 whereby interior ribs 45 having little clearance grip round the outer diameter of pipe length 41.
  • Accommodated in a groove 46 is an elastic sealing ring 47 and between the head end 52 of the pipe length 41 and a bulge 48 of pipe length 41 is accommodated a radial bridging ring 54 of easily deformable metal, for example copper.
  • Both pipe lengths 41 and 42 have an anti-corrosive layer 51, for example copper.
  • the pipe lengths 41 and 42 are each provided with an anti-corrosive layer 51 which is vapour deposited for example or applied in another way. It is interesting to note here that the bridging ring 54, because of the plastic deformation of pipe length 41, which as a result is also extended axially, is gripped rigidly and close fitting.
  • the cartridge 4 with explosive material can consist of a cord 4 of explosive material wound round a core 13 of plastic, around which cord is arranged a supporting bush 15 of plastic.
  • a detonator 16 is located at the left-hand end as shown In fig.
  • a wall thickness is preferably chosen for the pipe length 42 which is markedly greater, for example 50%, than that of pipe length 41, so that this extra wall thi-ckness serves as extra mass and also as reinforcement of the pipe length 42.
  • Shown in fig. 5 is a fraction of a pipe length 61 that is. plastically deformed according to the Invention, whereby the material of the wall 71 is forced into the spaces 50 between the ribs 45.
  • the ribs 45 and/or the space surfaces 74 have annular grooves 75 which improve the sealing and gripping between the pipe lengths 61 and 62.
  • an elastic sealing ring 76 is further present between pipe lengths 61 and 62.
  • Bridging ring 77 is a protruding piece of a coating 83 which is welded to coating 84 of pipe length 62. In fig. 5 the material of bridging ring 77 has melted together with the adjoining coating material 84 of pipe length 62.
  • Fig. 6 shows a pipe length 82 in the form of a sleeve, which connects together two pipe lengths 81 after application of the method according to the invention with use of a radial bridging ring 54.
  • the method according to the invention can be performed underwater.
  • the method according to the invention can be particularly applied underwater in a space filled with air and bounded by a habitat.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)

Abstract

Interior coated pipes are connected together by elastic and plastic deformation of pipe ends (1, 2) by detonating an explosive charge (4). When this explosion takes place the coatings of the two pipe ends are joined to each other by means of a bridging ring.

Description

Method for connecting together lengths of pipe in addition to join and lengths of pipe manufactured with said method.
The invention relates to a method in accordance with the preamble of claim 1.
Known in the connecting together of interior coated pipe lengths is the use as clamping means of a clamping tool, comprising a ring of rollers which are forced by a hydraulic tensioning mechanism with considerable force against the wall of the one pipe length while the ring of rollers is made to rotate. This tool is heavy and bulky and awkward to use, especially in places that are difficult to reach, partly due to the powerful hydraulic power supply source required. As a result this known method is not very suitable for connecting pipe lengths together underwater. The known method moreover leads to cracks in the connected pipe lengths. Welding together of pipe lengths which have an anti-corrosive coating is problematic because this coating is adversely affected by welding.
Connecting pipe lengths with flanges requires the presence of these flanges at the pipe length ends and lying precisely within the scope of the objective of the current invention is the attachment, for example, of a pipe length provided with a flange to a flangeless pipe length, following which the previously flangeless pipe length with the flange fitted onto it can be coupled to a flange of an existing pipeline. The invention has for its purpose to provide a method of the type referred to in the preamble which can be performed with tooling that is small in bulk and weight in places difficult of access and of which the manufactured join, if required, permits a considerable axial tensile force between the pipe lengths and which does not lead to fatigue cracks in one or both of the connected pipe lengths and/or to damaging of the coatings.
To this end at least an explosive charge is used as clamping means, this being detonated, and the coatings of both pipe lengths being joined to each other, when the explosion takes place, by means of a bridging ring. The join according to the invention thus has an unbroken coating, so that the coated material cannot be corroded by the aggressive substances to be transported. The operation and effect of the method according to the invention can best be elucidated on the basis of diagrams, so it suffices here to refer to the figure description hereafter following. Thereby elucidated will be the preferred steps for better control of the deformations of the pipe lengths as well as preferred steps for realizing an effective sealing ring between the pipe lengths, these steps being denoted as characteristics in the claims 2-9.
The invention also relates to and provides a join ; and pipe lengths manufactured as in the method according to the invention which are constructed for application in the method according to the invention.
It is noted that it is per se known to connect pipe lengths together by welding, them to each other under the influence of a detonation of an explosive charge, the dimensioning of which is so great that the metal is melted or that a molecular bonding results.
Use is made however in the method according to the invention of an explosive charge of a considerably smaller order of magnitude, for example one tenth, than the explosive charge required for welding. The current invention does not exclude the plastic deformation of a first (thick) wall part by an explosion in accordance with the essential insight of the current invention, nor does it exclude the melting of a second (thin) wall part by explosion of a charge of the same order of magnitude for welding onto another pipe length. In this case the charge used for the welding with respect to the small wall thickness is of another order of magnitude than the charge * used for the plastic deformation with respect to the large wall thickness.
In the drawings in diagrammatic form: fig. la, lb and lc and 2a, 2b and 2c show three successive situations in the application of the two different methods according to the invention, fig. 3a, 4 and 6 each show a variant of fig. la, fig. 3b is a section corresponding with fig. 3a in the situation after performing the method according to the invention, and fig. 5 shows on a larger scale a variant of a longitudinal section through a fraction of a join according to the invention.
In the most primitive method according to the invention as in fig. la, lb and lc, two pipe lengths 1 and 2 coated with an anti-corrosive layer 51 are inserted coaxially into each other with clearance 3 between them. A cartridge with explosive material 4 is further arranged in the one pipe length 1 and, in fig. lb, ignited. The stages of fig. la, lb and lc can thereby be distinguished from one another. In fig. la, before the explosion, the starting dimension, that is the outer diameter d . of pipe* length 1, is slightly smaller than the inner diameter e of pipe length 2.
During the explosion as according to fig. lb the outer diameter of pipe length 1 is the same as the inner diameter of pipe length 2 which amounts to e 2> this value e 2 being essentially greater than the diameter e j_, since the wall 12 of pipe length 2 is elastically deformed through the pressure applied to it by the wall 11 of pipe length 1. Under the influence of the explosion the- wall 11 is however deformed (expanded) not only over a diameter increase of e 2 -e 1 but also over the diameter increase e j-d ^ , this deformation being too great for an elastic deformation so that due to excessive deforming the state of plastic deformation of the wall 11 in fig. lb results.
After the explosion treatment the state of fig. lc arises, whereby the wall 12 of pipe length 2, which has the tendency to spring back, applies its so-called elastic deformation tension t to the pipe length 1, which can no longer spring back, or at least not so strongly. Thereby results an inner diameter e3 which is perhaps slightly smaller than the inner diameter e 2> hut which is significantly greater than its original diameter e _. This deformation tension t supplies a considerable holding 5 force.
The coating layer 51 of pipe length 1 has on its inner side a thin walled, axially extending bridging ring of the same coating material. When the explosion takes place this bridging ring 5, because it is thin walled, is
10. struck with force against both coating layers 51 of pipe Lengths 1 and 2, so that a liquid tight sealing results. -Lit unbroken coating is thus formed at the point of the join.. The bridging ring 5 adheres as a weld connection to the coa.ting layers 51.
15 In the method according to fig. 2a-2c a cylindrical cartridge 24 with explosive material built up of for example three segments is arranged inside a robust housing 25 around a pipe length 21 which is placed around a pipe leng-th 22 with a clearance g i~f i. '
20 During the explosion of fig. 2b the wall 31 of pipe length 21 is plastically deformed (compressed) and the wall 32 of pipe length 22 is deformed elastically (also compressed) in the same direction, until an outer diameter f2 results that is smaller than the original outer diameter
25 f j and appreciably smaller than the original inner diameter gl.
After the explosion arises the situation of fig. 2c, in which the outer diameter f 3 is perhaps slightly greater than the diameter f2 but which is still essentially smaller
30 than the original outer diameter f 1, so that the elastically deformed pipe length 22 applies its outwardly directed deforming tension q to the wall 31 of the pipe length 21 and thus applies a holding force to it on the interior.
35 The pipe lengths 21 and 22 each have an interior coating layer 51. The end of the pipe length 22 is moreover provided inside and outside with a vapour deposited layer which forms a bridging ring 23.
In the following embodiments only the method of
40 plastic deformation of the inner pipe length as according to fig. la-lc will be explained, although the reverse method of fig. 2a-2c is as equally applicable.
The practical embodiment variant of fig. 3a shows a first pipe length 41, which is for example the end of a long underwater pipe, and which has to be provided with a flange 10. To this end a pre-processed pipe length 42 according to the invention is provided with the required flange 10 for coupling to for example another pipe (not drawn). This pipe length 42 is placed onto the pipe length 41 whereby interior ribs 45 having little clearance grip round the outer diameter of pipe length 41. Accommodated in a groove 46 is an elastic sealing ring 47 and between the head end 52 of the pipe length 41 and a bulge 48 of pipe length 41 is accommodated a radial bridging ring 54 of easily deformable metal, for example copper. Both pipe lengths 41 and 42 have an anti-corrosive layer 51, for example copper.
After the explosion of the cartridge 4 with explosive material the situation of fig. 3b arises, in which material from the wall 49 is forced into the space 50 present between pipe lengths 41 and 42 and between the ribs 45. This gives a substantial axial holding rigidity. The pipe length 42 grips in fig. 3b like a sleeve around the straight pipe length 41. Such a sleeve-like pipe length can be the end of another pipe or piping element.
The pipe lengths 41 and 42 are each provided with an anti-corrosive layer 51 which is vapour deposited for example or applied in another way. It is interesting to note here that the bridging ring 54, because of the plastic deformation of pipe length 41, which as a result is also extended axially, is gripped rigidly and close fitting. In fig. 4 is shown that the cartridge 4 with explosive material can consist of a cord 4 of explosive material wound round a core 13 of plastic, around which cord is arranged a supporting bush 15 of plastic. A detonator 16 is located at the left-hand end as shown In fig. 4, so that the direction of detonation 17 is aimed from a partition 18 arranged for protection of piping elements present, if required, in or on pipe length 41, to an expansion tank 19 which is attached to flange 10. Arranged in fig. 3 and 4 around pipe length 42 is a heavy ring 20 built up of three segments which serves as anvil. When the explosion takes place the mass of this anvil 20 supplies a reaction force which prevents with certainty the plastic deformation of pipe length 42.
It is also conceivable not to use the anvil 20. In that case a wall thickness is preferably chosen for the pipe length 42 which is markedly greater, for example 50%, than that of pipe length 41, so that this extra wall thi-ckness serves as extra mass and also as reinforcement of the pipe length 42.
Shown in fig. 5 is a fraction of a pipe length 61 that is. plastically deformed according to the Invention, whereby the material of the wall 71 is forced into the spaces 50 between the ribs 45. In addition the ribs 45 and/or the space surfaces 74 have annular grooves 75 which improve the sealing and gripping between the pipe lengths 61 and 62. Further present between pipe lengths 61 and 62 is an elastic sealing ring 76.
FinalLy, a thin walled, axially extending bridging ring 77 of pipe length 61 is welded to the pipe length 62 in- one and the same explosion process in which the plastic deformation of pipe length 61 is realized. If required a vacuum is created between the pipe lengths 61 and 62 by suction before the explosion in order to reduce the charge needed.
Bridging ring 77 is a protruding piece of a coating 83 which is welded to coating 84 of pipe length 62. In fig. 5 the material of bridging ring 77 has melted together with the adjoining coating material 84 of pipe length 62.
Fig. 6 shows a pipe length 82 in the form of a sleeve, which connects together two pipe lengths 81 after application of the method according to the invention with use of a radial bridging ring 54.
The method according to the invention, particularly the method according to fig. 4, can be performed underwater. The method according to the invention can be particularly applied underwater in a space filled with air and bounded by a habitat.

Claims

1. Method for connecting together at least two interior coated pipe lengths (1, 2) extending into each other, whereby by means of clamping means (4) arranged on that side of the one (1) of both pipe lengths (1, 2) which Is turned away from the other (2) of both said pipe lengths (1, 2), the wall (11) of the one pipe length (1) is plastically deformed in the direction towards the other pipe length (2), and the wall (12) of the other pipe length (2) is deformed elastically in the same direction such that after said deforming treatment said wall (12) of the other pipe length (2) applies its elastic deformation tension to the wall of the one pipe length (1), characterized in that as clamping means at least an explosive charge is used, which is detonated, and that, when the explosion takes place, the coatings of both pipe lengths are joined to each other by means of a bridging ring.
2. Method as claimed in claim 1, characterized in that a radial ring is fixed between the gripping surfaces of both pipe lengths by material being driven upwards axially.
3. Method as claimed in claim 1, characterized in that an axially extending extension piece of the coating of the one pipe length is joined to the inner side of the coating of the other pipe length.
4. Method as claimed in claim 3, characterized in that the extension piece is fused with the coating of the other pipe length.
5. Method as claimed in any of the foregoing claims, characterized in that at least one sealing ring of elastic material is arranged between the pipe lengths.
6. Method as claimed in any of the foregoing claims, characterized in that plastic deformation of the wall (12) of the other pipe length (2) is prevented by means of a mass laid out on the side of said other pipe length (2) facing away from the one pipe length (1).
7. Method as claimed in any of the foregoing claims, characterized in that plastic deformation of the wall of the other pipe length is prevented by use of another pipe length having a wall thickness appreciably greater than that of the one pipe length.
8. Method as claimed in any of the foregoing claims, characterized In that material of the wall of the one pipe length is displaced plastically by the explosion into at least one space between both pipe lengths that was present prior to said explosion.
9. Method as claimed in any of the foregoing claims, characterized in that the other pipe length is provided on
Its side facing the one pipe length with at least one rib and preferably with a plurality of ribs arranged at mutual intervals from each other.
10. Method as claimed in any of the foregoing claims, characterized in that the face of the other pipe length . turned towards the one pipe length is provided with a considerable number of sealing grooves.
11. Connection manufactured with the application of the method as claimed in any of the foregoing claims.
12. Length of pipe evidently intended for the manufacture of a connection as claimed in any of the claims 1-8.
* * *
PCT/NL1986/000029 1985-09-04 1986-09-04 Method for connecting together lengths of pipe in addition to join and lengths of pipe manufactured with said method WO1987001428A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08710512A GB2189562B (en) 1985-09-04 1986-09-04 Method for connecting together lengths of pipe

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
NL8502420 1985-09-04
NL8502420 1985-09-04
NL8502610 1985-09-24
NL8502610A NL8502610A (en) 1985-09-24 1985-09-24 Connecting method for interiorly coated pipe lengths - uses cartridge of explosive material on plastically and elastically deformed pipe ends with elastic seal arranged between them

Publications (1)

Publication Number Publication Date
WO1987001428A1 true WO1987001428A1 (en) 1987-03-12

Family

ID=26646068

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NL1986/000029 WO1987001428A1 (en) 1985-09-04 1986-09-04 Method for connecting together lengths of pipe in addition to join and lengths of pipe manufactured with said method

Country Status (2)

Country Link
GB (1) GB2189562B (en)
WO (1) WO1987001428A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4002494A1 (en) * 1990-01-29 1991-08-08 Airbus Gmbh PIPE FITTING
US5992897A (en) * 1995-02-23 1999-11-30 Bg Plc Joining lined pipe items
WO2006037722A1 (en) * 2004-10-05 2006-04-13 Endress+Hauser Flowtec Ag Composite system, method for producing said system and sensor comprising a composite system of this type
US7299699B2 (en) 2004-10-05 2007-11-27 Endress + Hauser Flowtec Ag Composite system, method for its manufacture, and measurement pickup using such a composite system
DE102007059182A1 (en) * 2007-12-06 2009-06-10 Viega Gmbh & Co. Kg Method for establishing permanent connection between fitting and pipe, involves inserting end piece of fitting into pipe, and expanding end piece by bolt, where fitting is made of deformable- metal or plastic

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1155464A (en) * 1954-11-16 1958-05-05 Final bonding process for metal tubes
US3208757A (en) * 1963-10-23 1965-09-28 Pyramid Ind Inc Joint for plastic pipe
FR1486386A (en) * 1965-07-15 1967-06-23 Method and device for assembling tubular elements
FR1486657A (en) * 1966-07-13 1967-06-30 Method and device for assembling tubular elements
US3529856A (en) * 1969-01-08 1970-09-22 Dumont Aviat Associates Coupling and method of forming same
FR2183359A5 (en) * 1972-05-04 1973-12-14 Bretagne Atel Chantiers
US3868131A (en) * 1973-11-30 1975-02-25 Ultra Centrifuge Nederland Nv Methods and device for welding a metal pipe to a metal body by means of an explosive charge
FR2410203A1 (en) * 1977-11-24 1979-06-22 Nitro Nobel Ab PROCESS FOR CONNECTING AN INTERNAL METAL PIPE WITH AN EXTERNAL METAL PIPE SURROUNDING IT
GB1551816A (en) * 1976-07-30 1979-09-05 Yorkshire Imperial Metals Ltd Method of forming a seal between a tubular member and another member
FR2537244A1 (en) * 1982-12-03 1984-06-08 Nitro Nobel Ab JOINT BETWEEN TWO METALLIC PREFERRED PIPES AND METHOD FOR OBTAINING SAME

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1155464A (en) * 1954-11-16 1958-05-05 Final bonding process for metal tubes
US3208757A (en) * 1963-10-23 1965-09-28 Pyramid Ind Inc Joint for plastic pipe
FR1486386A (en) * 1965-07-15 1967-06-23 Method and device for assembling tubular elements
FR1486657A (en) * 1966-07-13 1967-06-30 Method and device for assembling tubular elements
US3529856A (en) * 1969-01-08 1970-09-22 Dumont Aviat Associates Coupling and method of forming same
FR2183359A5 (en) * 1972-05-04 1973-12-14 Bretagne Atel Chantiers
US3868131A (en) * 1973-11-30 1975-02-25 Ultra Centrifuge Nederland Nv Methods and device for welding a metal pipe to a metal body by means of an explosive charge
GB1551816A (en) * 1976-07-30 1979-09-05 Yorkshire Imperial Metals Ltd Method of forming a seal between a tubular member and another member
FR2410203A1 (en) * 1977-11-24 1979-06-22 Nitro Nobel Ab PROCESS FOR CONNECTING AN INTERNAL METAL PIPE WITH AN EXTERNAL METAL PIPE SURROUNDING IT
FR2537244A1 (en) * 1982-12-03 1984-06-08 Nitro Nobel Ab JOINT BETWEEN TWO METALLIC PREFERRED PIPES AND METHOD FOR OBTAINING SAME

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4002494A1 (en) * 1990-01-29 1991-08-08 Airbus Gmbh PIPE FITTING
US5992897A (en) * 1995-02-23 1999-11-30 Bg Plc Joining lined pipe items
WO2006037722A1 (en) * 2004-10-05 2006-04-13 Endress+Hauser Flowtec Ag Composite system, method for producing said system and sensor comprising a composite system of this type
US7299699B2 (en) 2004-10-05 2007-11-27 Endress + Hauser Flowtec Ag Composite system, method for its manufacture, and measurement pickup using such a composite system
CN101072983B (en) * 2004-10-05 2010-05-05 恩德斯+豪斯流量技术股份有限公司 Composite system, method for producing said system and sensor comprising a composite system of this type
DE102007059182A1 (en) * 2007-12-06 2009-06-10 Viega Gmbh & Co. Kg Method for establishing permanent connection between fitting and pipe, involves inserting end piece of fitting into pipe, and expanding end piece by bolt, where fitting is made of deformable- metal or plastic
DE102007059182B4 (en) * 2007-12-06 2017-04-13 Viega Gmbh & Co. Kg A method for making a permanent connection and a permanent connection between a fitting and a pipe, fitting for a pipe with a predetermined inner diameter and detachable connection between at least one fitting and a fitting body

Also Published As

Publication number Publication date
GB8710512D0 (en) 1987-06-03
GB2189562A (en) 1987-10-28
GB2189562B (en) 1989-01-11

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