GB2186524A - Addition of a branch fitting to a pipe - Google Patents

Addition of a branch fitting to a pipe Download PDF

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Publication number
GB2186524A
GB2186524A GB8703768A GB8703768A GB2186524A GB 2186524 A GB2186524 A GB 2186524A GB 8703768 A GB8703768 A GB 8703768A GB 8703768 A GB8703768 A GB 8703768A GB 2186524 A GB2186524 A GB 2186524A
Authority
GB
United Kingdom
Prior art keywords
branch
pipe
branch pipe
fitting
main
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.)
Pending
Application number
GB8703768A
Other versions
GB8703768D0 (en
Inventor
Alec Reginald Carruthers
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ALH Systems Ltd
Original Assignee
ALH Systems Ltd
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
Application filed by ALH Systems Ltd filed Critical ALH Systems Ltd
Publication of GB8703768D0 publication Critical patent/GB8703768D0/en
Publication of GB2186524A publication Critical patent/GB2186524A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3404—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint
    • B29C65/342—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint comprising at least a single wire, e.g. in the form of a winding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3472—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint
    • B29C65/3476—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint being metallic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
    • B29C65/7802—Positioning the parts to be joined, e.g. aligning, indexing or centring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/131—Single flanged joints, i.e. one of the parts to be joined being rigid and flanged in the joint area
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/32—Measures for keeping the burr form under control; Avoiding burr formation; Shaping the burr
    • B29C66/326—Shaping the burr, e.g. by the joining tool
    • B29C66/3262—Shaping the burr, e.g. by the joining tool as after-treatment, e.g. by a separate tool
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5224—Joining tubular articles for forming fork-shaped connections, e.g. for making Y-shaped pieces
    • B29C66/52241—Joining tubular articles for forming fork-shaped connections, e.g. for making Y-shaped pieces with two right angles, e.g. for making T-shaped pieces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5229—Joining tubular articles involving the use of a socket
    • B29C66/52291—Joining tubular articles involving the use of a socket said socket comprising a stop
    • B29C66/52292—Joining tubular articles involving the use of a socket said socket comprising a stop said stop being internal
    • 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
    • F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
    • F16L47/02—Welded joints; Adhesive joints
    • F16L47/03—Welded joints with an electrical resistance incorporated in the joint
    • 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
    • F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
    • F16L47/26—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics for branching pipes; for joining pipes to walls; Adaptors therefor
    • F16L47/34—Tapping pipes, i.e. making connections through walls of pipes while carrying fluids; Fittings therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2793/00—Shaping techniques involving a cutting or machining operation
    • B29C2793/0009—Cutting out
    • B29C2793/0018—Cutting out for making a hole
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2793/00—Shaping techniques involving a cutting or machining operation
    • B29C2793/009—Shaping techniques involving a cutting or machining operation after shaping
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Branch Pipes, Bends, And The Like (AREA)

Abstract

A branch fitting 2 is formed from a piece of pipe which has one end cut to conform to the outer surface of the main pipe 1 to which the fitting 2 is to be connected. The branch fitting 2 carries electrically conductive wire 5 on its surface at the cut end. A connection is formed by holding the fitting against the main pipe at the cut and passing a heating current through the electrically conductive wire 5. Material at the contact fuses and a weld is formed. The pipe 1 and fitting 2 can be interconnected by cutting away a portion of the main pipe 1 after welding. <IMAGE>

Description

SPECIFICATION Addition of a branch fitting to a pipe This invention relates to the welding of a branch fitting onto a main pipe,forexampleformedofa thermoplastic material such as polyethylene, and is particularly concerned with the technique known commonly as electrofusion.
In many of the current methods branches in such pipes are provided by the fusion of a saddle-shaped branch fitting around a hole in the pipe. Heatfor local fusion of the plastics material is often provided by an electrically conductive resistance wire embedded in the fitting close to the surface that is to be applied against the main pipe.
Examples of such fittings are seen in UK Patents Nos. 2137297,2137298,21 36074. It is clearthatthese are all complexmouldings; and that despite this many then take special measures for securing or incorporating the heating wire.
The object of the present invention is to simplify the construction and method of assembly of the branch fitting and the way the branch-off is formed, especiallyfor use in contexts where the duct to be branched is under low or zero excess pressure e.g. in new or replacement sewerage works.
In particular it avoids the need for a specifically moulded branch fitting.
According to the present invention a hollow branch pipe which is to be joined as a branch fitting to a main pipe has one end cut to conform to a part of the outer surface of the main pipe. There is an elec tricel ivy conductive wire on the cut surface at that end of the branch pipe. At leastthe branch pipe is of heat fusible material.
The electrically conductive wire is preferably wound spirally on the cut surface. Alternatively the wire may be arranged on the pipe end in a "daisypetal" pattern, i.e. as a crenellated annulus. Prefer a bly, the m a i n pipe and the branch fitting areof thermoplastics material.
The wire is held in placeforexample bytackwelding.
Where the main and branch pipes are of circular cross-section the cut of the cut end of the branch pipe is saddle-shaped.
In a further aspect of the invention we provide a method wherein the surface ofthe branch fitting so prepared is held againstthe main pipe and a current is passed through the electrically conductive wire, heating and fusing the material of the two pipes, and fitting and welding them together; whereafterthefitting may be used as a reaction member for a cutting element to penetrate the wall ofthe main pipe.
In that case a cutting element such as a saw,for exampleacircularsaw, or heating element is introduced down the branch fitting to cut a hole of the required size. This is of particular advantage when after fusion of the two pipes a deposit of upset material forms on the fitting interior. Such deposit, to the extent it would obstruct the branch, will be removed in the course of cutting the hole.
Clearly the present invention is particularly useful when access to the main pipe is limited such as when a new branch is required off an underground pipe, especially one which has been pulled through an ex- isting ductto replace a worn-out lining.
An embodiment ofthe invention will now be described, byway of example, in more detail with reference to the accompany drawings ofwhich: Figure 7 is a sectional view of the embodiment; Figure2 is a view on arrowA of Figure 1, showing wire wound onto the cut face ofthe branch fitting; Figure 3 shows an apparatus for applying pressure to the branch fitting during welding; Figure 4 is a view of the embodiment of Figure 1 afterfusion has taken place; and Figure 5 is a sectional view of the apparatus providing communication between the branch fitting and the main pipe.
Figure 1 shows a main pipe 1 formed for example of thermoplastic material such as polyethylene and complete in profile, a hole having not yet been cut where branching is required.
A length of thermoplastic pipe 2 is to be fused to the main pipe as a branch fitting. It is an ordinary length of plain thermoplastic piping of which one end 3 has been fly-cut to produce a saddle-shape with substantiallythesame radius asthe main pipe 1 so asto enable itto conform to the shape of the outside wall 8 of the pipe 1. This clearly ensures proper and secure sealing between the pipes.
Agroove4 is formed in the outside ofthe pipe by which it may be tightly held by a clamp or some other device to hold it in place during the fusion step. This device may be the same as the cutting apparatus described later in the discussion of Figure 5. Awidened portion 9 is bored into the other end ofthe pipeto receivefurtherducting.
On the saddle-cut edge 3 of the fitting 2 there is wound a resistance wire5 both of whose ends, 6 and 7, are passed through bores to the external wall of the fitting 2 in orderthatthey may be accessible to a current source. As shown in Figure 2 the wire is wound substantially uniformly over the cut surface of the pipe in a spiral. Alternatively other patterns may be used, especially a crenellated (zig-zag) an nulus.Thewireshould passfrom closetotheinner circumference of the pipe to the outer. The wire is kept in place by tack-welding formed by simplefu- sion ofthe material of the fitting 2, for instance along radii 10,11,12 but may be retained by other methods such as glueing with compatible adhesive.
The pipe 1 and fitting 2 are heldtogetherwith sur faces3and8sandwichingthewire5.Acurrentis then passed through the wire 5 which causes local fusion of the thermoplastic material and leads to the welding of the fitting 2 onto the main pipe 1. Clearly it may be desirable to maintain a light pressure in the direction B of Figure 1 during this process, in order that the fitting 2 is held firmly in place. Increased pressure is applied after an adequate heating has occurred. Figure 3 shows apparatus 13 which may be used. A smali hole is bored in the main pipe 1 and stem 14 screwed into it. A plate 15 is loosely borne on the stem, and is pressed, by a spring 16 trapped between it and a head 17 of the stem, onto the plainer cut end of the fitting 2. Pressure is adjusted by turning the stem by means of its head.
Figure 4 shows the fusion product in section. Deposits 20 of the thermoplastic material lie around the junction ofthe pipes and a section ofthe main pipe wall 21, prevents communication between the two pipes.
This section 21 is removed by the apparatus shown in Figure 5.
Figure 5 illustrates in section the fusion product, 1 and 2, held firmly at groove 4 offitting 2 by drill device 23. The groove 4 may or may not extend around the whole of the end of the branch fitting. This device grips the branch pipe by means of studs orcirolip at 22 engaging with the grooves 4. The device extends overtheend ofthefitting 2 remote from its junction with pipe 1 and holds in place cutting apparatus 25.
The cutting apparatus extends through the device into the interior of the fitting where it may be brought into contactwith the section 21 ofthe main pipe wall.
According to this particular embodimentthe cutting device includes a circular saw part 27 which by rotation, as shown in the figure, is able to cut the section 21 out ofthe main pipe wall, but may clearly be any suitable cutting tool, such as a circular heating element, etc.
It will be evident to the man skilled in the artthat this technique will be applicable whenever a new branch junction is required in a pipe whose material may be fused by electrically conductive wire. Indeed certain metallic alloys may be susceptible to the method ofthe invention.

Claims (14)

1. A branch fitting for connection to a main pipe comprising a hollow branch pipe of heat-fusible material with an end cutto conform to a part of the outer surface of the main pipe, and an electrically conductive wire on the cut surface of that end ofthe branch pipe.
2. A branch fitting according to claim 1, wherein the wire is secured to the cut surface bytackwelds.
3. A branch fitting according to claim 1 or claim 2, whereinthewire is arranged as a spiral onthecut surface.
4. A branch fitting according to claim 1 or claim 2, wherein the wire is arranged as a crenellated annulus.
5. A branch fitting according to any one ofthe precedingclaimsforconnectiontoa main pipe of circular cross-section, wherein the branch pipe is of circularcross-section and the cut of the cut end ofthe branch pipe is saddle-shaped.
6. A branch fitting according to any one of the preceding claims, wherein the branch pipe is of thermoplastics material.
7. A branch fitting substantially as herein descri bed with reference to and as illustrated in the accompanying drawings.
8. A method offorming a branch offjoint be- tween a main pipe and a branch pipe, comprising cutting an end of the branch pipe to conform to a part of the outer surface of the main pipe, positioning el ectrically conductive wire on the cut end of the branch pipe, positioning the cut end ofthe branch pipe on the conforming part of the outer surface of the main pipe with the wire therebetween, and pas sing acurrentthroughthewireto heatthebranch pipeandthemain pipe, and causefusionthere- between.
9. A method according to claim 8, wherein, during the heating andfusion pressure is appliedtothe branch pipe in the direction of the main pipe.
10. Amethodaccordingtoclaim8orclaim9, wherein, after the fusion of the main and branch pipes, the part of the surface of the main pipewithin the branch pipe is removed.
11. A method according to claim 10,whereinthe removal of the part ofthe main pipe within the branch pipe is achieved by the cutting action of a tool guided by a support secured to the branch pipe.
12. A method offorming a branch off joint sub- stantially as herein described with reference to the accompanying drawings.
13. An apparatus for carrying out the method according to claim 10 or claim 11, comprising a sleeve, slidable overthe branch pipe, the sleeve having means, engageable with the branch pipe for holding the apparatus at its position of use; and a shaft rotatably mounted within the sleeve, and insertable within the branch pipe, said shaft carrying cutting means for cutting away part of the main pipe.
14. An apparatus according to claim 13wherein the means by which the sleeve is engageable with the branch pipe has at one end, at least one radially inwardly extending projection, engageable with at least one recess in the outer surface of the branch pipe at the end ofthe branch pipe which contacts the pipe, and at the other end has an end wall, carrying extensions projecting inside the branch pipe and abuttable againstthe inside wall of the branch pipe, the shaft of the apparatus being mounted in the end wall.
GB8703768A 1986-02-18 1987-02-18 Addition of a branch fitting to a pipe Pending GB2186524A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8603979A GB8603979D0 (en) 1986-02-18 1986-02-18 Addition of branch member to thermoplastic pipes

Publications (2)

Publication Number Publication Date
GB8703768D0 GB8703768D0 (en) 1987-03-25
GB2186524A true GB2186524A (en) 1987-08-19

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GB8603979A Pending GB8603979D0 (en) 1986-02-18 1986-02-18 Addition of branch member to thermoplastic pipes
GB8703768A Pending GB2186524A (en) 1986-02-18 1987-02-18 Addition of a branch fitting to a pipe

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Application Number Title Priority Date Filing Date
GB8603979A Pending GB8603979D0 (en) 1986-02-18 1986-02-18 Addition of branch member to thermoplastic pipes

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0528261A1 (en) * 1991-08-19 1993-02-24 Friatec Ag Keramik- Und Kunststoffwerke Arrangement with a branch fitting
EP0826483A1 (en) * 1996-08-28 1998-03-04 ESSEF Corporation Fitting installation process and apparatus for a molded plastic vessel
WO2010080194A1 (en) * 2008-12-11 2010-07-15 Parker-Hannifin Corporation Configurable pressure vessel

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1132906A (en) * 1965-05-20 1968-11-06 Cabot Corp Welding method for cured polymeric compositions
GB1388293A (en) * 1971-06-01 1975-03-26 Mannesmann Ag Method of welding thermoplastic materials
EP0069020A1 (en) * 1981-07-01 1983-01-05 Innovation Technique Plastics device for perforating a plastics element placed below it, process for producing the device and its use in the production of pipe branchings
EP0119061A1 (en) * 1983-03-09 1984-09-19 Victaulic Plc Improvements in or relating to weldable pipe fittings
GB2137710A (en) * 1983-03-30 1984-10-10 Fusion Plastics Ltd Branch pipe fitting
EP0145581A2 (en) * 1983-12-07 1985-06-19 Societe D'etudes De Recherches Et D'applications Des Plastiques (S.E.R.A.P.) Pressure branching attachment with an electrical resistance and method of making the same
GB2158007A (en) * 1984-04-27 1985-11-06 Glynwed Tubes & Fittings A fusion pad

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1132906A (en) * 1965-05-20 1968-11-06 Cabot Corp Welding method for cured polymeric compositions
GB1388293A (en) * 1971-06-01 1975-03-26 Mannesmann Ag Method of welding thermoplastic materials
EP0069020A1 (en) * 1981-07-01 1983-01-05 Innovation Technique Plastics device for perforating a plastics element placed below it, process for producing the device and its use in the production of pipe branchings
EP0119061A1 (en) * 1983-03-09 1984-09-19 Victaulic Plc Improvements in or relating to weldable pipe fittings
GB2137710A (en) * 1983-03-30 1984-10-10 Fusion Plastics Ltd Branch pipe fitting
EP0145581A2 (en) * 1983-12-07 1985-06-19 Societe D'etudes De Recherches Et D'applications Des Plastiques (S.E.R.A.P.) Pressure branching attachment with an electrical resistance and method of making the same
GB2158007A (en) * 1984-04-27 1985-11-06 Glynwed Tubes & Fittings A fusion pad

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0528261A1 (en) * 1991-08-19 1993-02-24 Friatec Ag Keramik- Und Kunststoffwerke Arrangement with a branch fitting
EP0826483A1 (en) * 1996-08-28 1998-03-04 ESSEF Corporation Fitting installation process and apparatus for a molded plastic vessel
WO2010080194A1 (en) * 2008-12-11 2010-07-15 Parker-Hannifin Corporation Configurable pressure vessel
US10428946B2 (en) 2008-12-11 2019-10-01 Parker-Hannfin Corporation Configurable pressure vessel

Also Published As

Publication number Publication date
GB8703768D0 (en) 1987-03-25
GB8603979D0 (en) 1986-03-26

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