WO2008026155A2 - Socket and spigot pipe - Google Patents

Socket and spigot pipe Download PDF

Info

Publication number
WO2008026155A2
WO2008026155A2 PCT/IB2007/053447 IB2007053447W WO2008026155A2 WO 2008026155 A2 WO2008026155 A2 WO 2008026155A2 IB 2007053447 W IB2007053447 W IB 2007053447W WO 2008026155 A2 WO2008026155 A2 WO 2008026155A2
Authority
WO
WIPO (PCT)
Prior art keywords
pipe
spigot
socket
external diameter
diameter
Prior art date
Application number
PCT/IB2007/053447
Other languages
French (fr)
Other versions
WO2008026155A3 (en
Inventor
Stuart Michael Bacon
Original Assignee
Robor (Proprietary) Limited
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 Robor (Proprietary) Limited filed Critical Robor (Proprietary) Limited
Publication of WO2008026155A2 publication Critical patent/WO2008026155A2/en
Publication of WO2008026155A3 publication Critical patent/WO2008026155A3/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
    • F16L21/00—Joints with sleeve or socket
    • F16L21/02—Joints with sleeve or socket with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings
    • F16L21/03—Joints with sleeve or socket with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings placed in the socket before connection
    • 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
    • F16L47/06—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with sleeve or socket formed by or in the pipe end
    • F16L47/08—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with sleeve or socket formed by or in the pipe end with sealing rings arranged between the outer surface of one pipe end and the inner surface of the sleeve or socket, the sealing rings being placed previously in the sleeve or socket
    • 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
    • F16L47/20—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics based principally on specific properties of plastics
    • F16L47/24—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics based principally on specific properties of plastics for joints between metal and plastics pipes

Definitions

  • This invention relates to a socket and spigot pipe.
  • Plastic socket and spigot pipes are well known.
  • a socket is formed at one of the ends of the pipe.
  • the socket includes a groove for a pressure activated seal. Examples of these seals are Forsheda, Anger and Lyng seals.
  • the spigot of one pipe is inserted through the seal and located in the socket of another similar pipe to form a sealed joint between the two pipes.
  • a socket and spigot pipe comprising a first end and a second end, with an intermediate section located intermediate the first and second ends, the first end having a socket with a groove for a seal, the second end having a spigot, the spigot including a circular cylindrical section having an enlarged or reduced external diameter relative to the external diameter of the intermediate section of the pipe with the external diameter of the circular cylindrical section of the spigot being slightly less than the internal diameter of the socket so that in use the spigot of one pipe can be inserted through the seal and be located in the socket of another pipe to form a sealed joint between the two pipes.
  • the internal diameter of the socket is greater than the internal diameter of the intermediate section, and the external diameter of the cylindrical section of the spigot is less than the external diameter of the intermediate section. In other cases, the internal diameter of the socket is less than the internal diameter of the intermediate section and the external diameter of the cylindrical section of the spigot is greater than the external diameter of the intermediate section.
  • the spigot have an inwardly tapering free end to facilitate insertion of the spigot into a socket.
  • the internal surface of the pipe may be lined for example with a polymeric.
  • the external surface may be similarly lined at least at the spigot.
  • the pipe will typically be made of a ductile material such as steel, with a wall thickness of 4 mm or less, typically 3mm or less.
  • a method of manufacturing a socket and spigot pipe comprising the steps of: providing a pipe of ductile material having a first end and a second end and having a constant diameter throughout;
  • Figure 1 shows a cross-sectional side view of pipe according to the invention
  • Figure 2 shows a cross-sectional side view of two pipes as shown in Figure 1 connected end to end;
  • Figure 3 shows a cross-sectional side view of a pipe according to another embodiment of the invention.
  • a steel socket and spigot pipe 10 formed from a standard steel pipe includes a socket 12, an intermediate section 14 and a spigot 16.
  • the socket 12 has a circumferentially extending groove 18 for an elastomeric seal 20 seen in Figure 2.
  • the spigot 16 has a circular cylindrical section 17 with an external diameter indicated by arrows 22 which is reduced relative to the external diameter, indicated by arrows 24, of the intermediate section 14.
  • the external diameter 22 of the circular cylindrical section of the spigot 16 is slightly less than the internal diameter, indicated by arrows 26, of the socket 12. This is so that the spigot 16 of one pipe can be inserted through the seal 20 and into the socket of another pipe to form a sealed joint between the two pipes. Initially a low pressure seal is formed by slight compression of the seal by the spigot. Thereafter, when pressurized fluid is introduced into the pipes, the seal is pressure activated and a higher pressure seal is obtained.
  • the internal diameter, indicated by arrow 28, of the intermediate section 14 is less than the internal diameter, indicated by arrow 26, of the socket 12.
  • the free end 30 of the spigot 16 tapers inwardly to facilitate insertion of the spigot 16 into a socket 12.
  • two pipes can be connected end to end with the spigot 16 of one pipe inserted through the seal 20 and located within the socket 12 of the other pipe.
  • the external diameter of the spigot 16 and the internal diameter of the socket 12 correspond to those of conventional plastic socket and spigot pipes.
  • the steel pipe 10 can be used interchangeably with conventional plastic socket and spigot pipes.
  • certain conventional plastic socket and spigot pipe is provided with an external diameter of 63 mm.
  • Nominally corresponding structural steel pipe has an external diameter of 63,5 mm and an internal diameter of 57,3 mm, and nominally corresponding conveyance steel pipe has an external diameter of 60,3 mm and an internal diameter of 57,3 mm.
  • the spigot end of the steel pipe would be reduced by 0,5 mm in external diameter to correspond to the outside diameter of the plastic pipe and, in forming the socket, the internal diameter of the socket would be increased to slightly greater than 63 mm.
  • conveyance steel pipe is to be used the spigot end of the steel pipe would be enlarged by 2.7 mm in external diameter to correspond to the external diameter of the plastic pipe and the internal diameter of the socket end would be increased to slightly greater than 63 mm.
  • a steel spigot and socket pipe 10.1 formed from a standard steel pipe, is similar to pipe 10 except that the external diameter 22.1 of the circular cylindrical portion 17.1 of the spigot 16.1 is enlarged relative to the external diameter 24.1 of the intermediate section 14.1.
  • the internal surface of the pipe 10, 10.1 could be lined, typically with a polymeric lining, for abrasion or corrosion resistance.
  • a polymeric lining for abrasion or corrosion resistance.
  • the external surface of that portion of the spigot 16 which extends beyond the seal 20 in a pipe connection will also be exposed to fluid conveyed in the pipes, such external surface may similarly be lined, with the lining extending the end surface of the pipe at the spigot end so that the steel surfaces at this end are fully lined.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Joints With Sleeves (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)

Abstract

One aspect of the invention concerns a socket and spigot pipe (10). The pipe has first and second ends and an intermediate section (14) between the ends. A socket (12) with a groove (18) for a seal (20) is formed at the first end and a spigot (16) is formed at the second end. The spigot includes a circular cylindrical section (17) having an enlarged or reduced external diameter relative to the external diameter of the intermediate section (14). The external diameter of the cylindrical section (17) is slightly less than the internal diameter of the socket (12) so that in use the spigot (16) of one pipe can be inserted through the seal (20) and be located in the socket of another pipe to form a sealed joint between the two pipes. Another aspect of the invention concerns a method of manufacturing the socket and spigot pipe.

Description

"SOCKET AND SPIGOT PIPE"
FIELD OF THE INVENTION
This invention relates to a socket and spigot pipe.
BACKGROUND TO THE INVENTION
Plastic socket and spigot pipes are well known. A socket is formed at one of the ends of the pipe. The socket includes a groove for a pressure activated seal. Examples of these seals are Forsheda, Anger and Lyng seals. The spigot of one pipe is inserted through the seal and located in the socket of another similar pipe to form a sealed joint between the two pipes.
Commercially available steel pipes are not compatible with plastic socket and spigot pipes. This is because the external or outside diameters of the steel pipes are different to the external diameters of the plastic socket and spigot pipes.
It is possible to manufacture steel pipes having the same external diameter as plastic socket and spigot pipes, as suggested in ZA 2005/05712. However a disadvantage of this is the cost associated with setting up the equipment to manufacture the steel pipes, as the existing steel pipe production equipment cannot be utilized. SUMMARY OF THE INVENTION
According to a first aspect of the invention there is provided a socket and spigot pipe comprising a first end and a second end, with an intermediate section located intermediate the first and second ends, the first end having a socket with a groove for a seal, the second end having a spigot, the spigot including a circular cylindrical section having an enlarged or reduced external diameter relative to the external diameter of the intermediate section of the pipe with the external diameter of the circular cylindrical section of the spigot being slightly less than the internal diameter of the socket so that in use the spigot of one pipe can be inserted through the seal and be located in the socket of another pipe to form a sealed joint between the two pipes.
In some cases, the internal diameter of the socket is greater than the internal diameter of the intermediate section, and the external diameter of the cylindrical section of the spigot is less than the external diameter of the intermediate section. In other cases, the internal diameter of the socket is less than the internal diameter of the intermediate section and the external diameter of the cylindrical section of the spigot is greater than the external diameter of the intermediate section.
It is preferred that the spigot have an inwardly tapering free end to facilitate insertion of the spigot into a socket.
The internal surface of the pipe may be lined for example with a polymeric. The external surface may be similarly lined at least at the spigot.
The pipe will typically be made of a ductile material such as steel, with a wall thickness of 4 mm or less, typically 3mm or less.
According to another aspect of the invention there is provided a method of manufacturing a socket and spigot pipe comprising the steps of: providing a pipe of ductile material having a first end and a second end and having a constant diameter throughout;
modifying the first end of the pipe to form a socket having a groove for a seal;
modifying the second end of the pipe by increasing or reducing its diameter to form a spigot having an external diameter slightly less than the internal diameter of the socket so that in use the spigot of one pipe can be inserted through the seal and into the socket of another similar pipe to form a sealed joint between the two pipes; and
leaving an intermediate section of the pipe, between the first and second ends, unmodified.
Other features of the invention are set forth in the appended claims.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will now be described in more detail, by way of example only, with reference to the accompanying drawings.
In the drawings:
Figure 1 shows a cross-sectional side view of pipe according to the invention;
Figure 2 shows a cross-sectional side view of two pipes as shown in Figure 1 connected end to end; and
Figure 3 shows a cross-sectional side view of a pipe according to another embodiment of the invention. DETAILED DESCRIPTION OF THE DRAWINGS
Referring firstly to Figures 1 and 2, a steel socket and spigot pipe 10 formed from a standard steel pipe includes a socket 12, an intermediate section 14 and a spigot 16. The socket 12 has a circumferentially extending groove 18 for an elastomeric seal 20 seen in Figure 2.
The spigot 16 has a circular cylindrical section 17 with an external diameter indicated by arrows 22 which is reduced relative to the external diameter, indicated by arrows 24, of the intermediate section 14.
The external diameter 22 of the circular cylindrical section of the spigot 16 is slightly less than the internal diameter, indicated by arrows 26, of the socket 12. This is so that the spigot 16 of one pipe can be inserted through the seal 20 and into the socket of another pipe to form a sealed joint between the two pipes. Initially a low pressure seal is formed by slight compression of the seal by the spigot. Thereafter, when pressurized fluid is introduced into the pipes, the seal is pressure activated and a higher pressure seal is obtained.
The internal diameter, indicated by arrow 28, of the intermediate section 14 is less than the internal diameter, indicated by arrow 26, of the socket 12.
The free end 30 of the spigot 16 tapers inwardly to facilitate insertion of the spigot 16 into a socket 12.
As can be seen in Figure 2, two pipes can be connected end to end with the spigot 16 of one pipe inserted through the seal 20 and located within the socket 12 of the other pipe.
The external diameter of the spigot 16 and the internal diameter of the socket 12 correspond to those of conventional plastic socket and spigot pipes. Thus the steel pipe 10 can be used interchangeably with conventional plastic socket and spigot pipes. By way of example, certain conventional plastic socket and spigot pipe is provided with an external diameter of 63 mm. Nominally corresponding structural steel pipe has an external diameter of 63,5 mm and an internal diameter of 57,3 mm, and nominally corresponding conveyance steel pipe has an external diameter of 60,3 mm and an internal diameter of 57,3 mm.
In accordance with the invention, if the structural steel pipe is to be used, the spigot end of the steel pipe would be reduced by 0,5 mm in external diameter to correspond to the outside diameter of the plastic pipe and, in forming the socket, the internal diameter of the socket would be increased to slightly greater than 63 mm. If conveyance steel pipe is to be used the spigot end of the steel pipe would be enlarged by 2.7 mm in external diameter to correspond to the external diameter of the plastic pipe and the internal diameter of the socket end would be increased to slightly greater than 63 mm. With these modifications of their spigot and socket ends the socket of both the structural steel pipe and the conveyance steel pipe would be able to receive a 63 mm external diameter spigot of another pipe whether it be a plastic or a steel pipe.
Referring now to Figure 3 a steel spigot and socket pipe 10.1 , formed from a standard steel pipe, is similar to pipe 10 except that the external diameter 22.1 of the circular cylindrical portion 17.1 of the spigot 16.1 is enlarged relative to the external diameter 24.1 of the intermediate section 14.1.
The internal surface of the pipe 10, 10.1 could be lined, typically with a polymeric lining, for abrasion or corrosion resistance. As the external surface of that portion of the spigot 16 which extends beyond the seal 20 in a pipe connection will also be exposed to fluid conveyed in the pipes, such external surface may similarly be lined, with the lining extending the end surface of the pipe at the spigot end so that the steel surfaces at this end are fully lined.
As an alternative to a polymeric lining, other forms of corrosion protection, for example epoxy coating, painting or galvanising could be applied to the internal surface of the pipe and/or at least to the external surface of the spigot. It will be appreciated that many modifications or variations of the invention are possible without departing from the spirit or scope of the invention. For example the scope of the invention extends to fittings such as bends, T-pieces, crosses and laterals having sockets and spigots as described above. The term "pipe" should accordingly be interpreted to include to such fittings.

Claims

CLAI WIS
1.
A socket and spigot pipe comprising a first end and a second end, with an intermediate section located intermediate the first and second ends, the first end having a socket with a groove for a seal, the second end having a spigot, the spigot including a circular cylindrical section having an enlarged or reduced external diameter relative to the external diameter of the intermediate section of the pipe with the external diameter of the circular cylindrical section of the spigot being slightly less than the internal diameter of the socket so that in use the spigot of one pipe can be inserted through the seal and be located in the socket of another pipe to form a sealed joint between the two pipes.
2.
A socket and spigot pipe according to claim 1 wherein the internal diameter of the socket is greater than the internal diameter of the intermediate section of the pipe.
3.
A socket and spigot pipe according to claim 2 wherein the external diameter of the cylindrical section of the spigot is less than the external diameter of the intermediate section of the pipe.
4.
A socket and spigot pipe according to claim 1 wherein the internal diameter of the socket is less than the internal diameter of the intermediate section of the pipe.
5.
A socket and spigot pipe according to claim 4 wherein the external diameter of the cylindrical section of the spigot is greater than the external diameter of the intermediate section of the pipe.
6.
A socket and spigot pipe according to any one of the preceding claims wherein the spigot has an inwardly tapering free end to facilitate insertion of the spigot into a socket.
7.
A socket and spigot pipe according to any one of the preceding claims wherein the internal surface of the pipe is lined.
8.
A socket and spigot pipe according to any one of the preceding claims wherein at least the external surface of the spigot is lined.
9.
A socket and spigot pipe according to any one of the preceding claims wherein the pipe is made of a ductile material.
10.
A socket and spigot pipe according to claim 9 wherein the pipe is made of steel.
11.
A socket and spigot pipe according to claim 10 wherein the wall thickness of the steel pipe is 4 mm or less.
12.
A socket and spigot pipe according to claim 11 wherein the wall thickness is 3 mm or less.
13.
A method of manufacturing a socket and spigot pipe comprising the steps of:
providing a pipe of ductile material having a first end and a second end and having a constant diameter throughout;
modifying the first end of the pipe to form a socket having a groove for a seal;
modifying the second end of the pipe by increasing or reducing its diameter to form a spigot having an external diameter slightly less than the internal diameter of the socket so that in use the spigot of one pipe can be inserted through the seal and into the socket of another similar pipe to form a sealed joint between the two pipes; and
leaving an intermediate section of the pipe, between the first and second ends, unmodified.
14.
A method according to claim 13 wherein the socket is formed by enlarging the internal diameter of the pipe at the first end to a diameter greater than the internal diameter of the intermediate section of the pipe.
15.
A method according to claim 13 or 14 wherein the spigot is formed with an external diameter less than the external diameter of the intermediate section.
16.
A method according to claim 13 wherein the socket is formed by reducing the internal diameter of the pipe at the first end to a diameter less than the internal diameter of the intermediate section of the pipe.
17.
A method according to claim 17 wherein the spigot is formed with an external diameter greater than the external diameter of the intermediate section.
18.
A method according to any one of claims 13 to 17 and comprising the step of forming an inwardly tapering section on a free end of the spigot.
19.
A method accorting to any one of claims 13 to 18 and comprising the step of lining the internal surface of the pipe.
20.
A method according to claim 19 and comprising the step of lining the external surface of the pipe at least at the spigot.
PCT/IB2007/053447 2006-08-29 2007-08-28 Socket and spigot pipe WO2008026155A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA2006/07208 2006-08-29
ZA200607208 2006-08-29

Publications (2)

Publication Number Publication Date
WO2008026155A2 true WO2008026155A2 (en) 2008-03-06
WO2008026155A3 WO2008026155A3 (en) 2008-08-21

Family

ID=39060309

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2007/053447 WO2008026155A2 (en) 2006-08-29 2007-08-28 Socket and spigot pipe

Country Status (1)

Country Link
WO (1) WO2008026155A2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010015975A1 (en) * 2008-08-06 2010-02-11 Jain Irrigation Systems Limited A pipe with integral male and female ends, a joint made using the same pipe, and processes of making the pipe and the joint

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ZA200505712B (en) 2005-07-18 2006-04-26 Epns Engineering Pty Ltd Steel pipe section

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4132251C1 (en) * 1991-09-27 1992-11-19 Buderus Guss Gmbh, 6330 Wetzlar, De
US6457718B1 (en) * 2000-08-25 2002-10-01 S & B Technical Products, Inc. Method of forming a pipe joint between metal pipes using an extensible gasket
FR2851319B1 (en) * 2003-02-19 2005-10-28 Participation Gestion Dev Ind DEVICE FOR ASSEMBLING CYLINDRICAL PIPES
ATE499565T1 (en) * 2003-11-20 2011-03-15 Tyco Water Pty Ltd PIPE CONNECTION BETWEEN METAL PIPES AND METHOD FOR PRODUCING SUCH A CONNECTION

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ZA200505712B (en) 2005-07-18 2006-04-26 Epns Engineering Pty Ltd Steel pipe section

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010015975A1 (en) * 2008-08-06 2010-02-11 Jain Irrigation Systems Limited A pipe with integral male and female ends, a joint made using the same pipe, and processes of making the pipe and the joint
GB2474982A (en) * 2008-08-06 2011-05-04 Jain Irrigation Systems Ltd A pipe with integral male and female ends, a joint made using the same pipe and processes of making the pipe and the joint
GB2474982B (en) * 2008-08-06 2013-03-13 Jain Irrigation Systems Ltd A novel pipe with integral male and female ends, a novel jointmade using the same, and process of making the pipe and the joint
US8579334B2 (en) 2008-08-06 2013-11-12 Jain Irrigation Systems Limited Pipe with integral male and female ends, a joint made using the same pipe, and processes of making the pipe and the joint

Also Published As

Publication number Publication date
WO2008026155A3 (en) 2008-08-21

Similar Documents

Publication Publication Date Title
US7774915B2 (en) Ductile iron pressure fit gasket
CN102472419B (en) Self restrained ductile iron fitting
US7845686B2 (en) Restrained pipe joining system for plastic pipe
US6488319B2 (en) Self restrained pressure gasket
WO2008007230A3 (en) Integral pipe and fitting assembly of polymer material, and method of makng same
US9951869B2 (en) Seal for belled pipe
US7404872B2 (en) PVC seismic coupling and method of installation
CA2691104C (en) A method and apparatus for inhibiting corrosion in strings of tubulars
WO2005121622A1 (en) Screw coupling for oil well pipe
US8020899B2 (en) PVC pipe coupling
JP2024012603A (en) Fitting for connecting to tubular element, tubing connection, and method for connecting fitting to tubular element
EP2283266B1 (en) Pipe coupling assembly and method for lined and unlined pipe
US20110187059A1 (en) Sealing Gasket for Corrugated Pipe
WO2008026155A2 (en) Socket and spigot pipe
EP2056011A2 (en) Threaded pipe connector of plastic material with reinforcing metal ring
CN100527552C (en) Joint construction for cable piping
US20230258288A1 (en) End terminations and unions for a hose construction with a coupling having a non-metallic insert and method of making same
JP2007278440A (en) Synthetic resin pipe joint
WO2008012810A2 (en) A pipe fitting assembly and adapter therefor
CA2607783A1 (en) Composite tubing coupling terminal and method
JP4979652B2 (en) Method of connecting rubber ring joints of ribbed pipes, ribbed pipes and sewer pipes
CA3109443C (en) Threaded connection for steel pipes
CN108266586A (en) Bindiny mechanism and the liquid transporting apparatus using the bindiny mechanism
AU2006203094B2 (en) End Fitting for Pipe
EP3181973A1 (en) Support liner for a connection between a tube end and a mechanical coupling device

Legal Events

Date Code Title Description
NENP Non-entry into the national phase in:

Ref country code: DE

NENP Non-entry into the national phase in:

Ref country code: RU

122 Ep: pct application non-entry in european phase

Ref document number: 07826166

Country of ref document: EP

Kind code of ref document: A2