AU2015101853B4 - Improvements in Polymer Piping - Google Patents
Improvements in Polymer Piping Download PDFInfo
- Publication number
- AU2015101853B4 AU2015101853B4 AU2015101853A AU2015101853A AU2015101853B4 AU 2015101853 B4 AU2015101853 B4 AU 2015101853B4 AU 2015101853 A AU2015101853 A AU 2015101853A AU 2015101853 A AU2015101853 A AU 2015101853A AU 2015101853 B4 AU2015101853 B4 AU 2015101853B4
- Authority
- AU
- Australia
- Prior art keywords
- pipe section
- branch pipe
- aperture
- main pipe
- reinforcing collar
- 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.)
- Expired
Links
- 229920000642 polymer Polymers 0.000 title claims abstract description 14
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 31
- 238000000034 method Methods 0.000 claims abstract description 13
- 238000005728 strengthening Methods 0.000 claims abstract description 5
- 239000002861 polymer material Substances 0.000 claims description 5
- 229920001903 high density polyethylene Polymers 0.000 description 7
- 239000004700 high-density polyethylene Substances 0.000 description 7
- 238000003466 welding Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000009172 bursting Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Landscapes
- Branch Pipes, Bends, And The Like (AREA)
Abstract
- 10 A method of strengthening forge moulded "tee" pieces for polymer pipe work; the method including the provision of a reinforcing collar proximate a junction between a main pipe section and a branch pipe section; the main pipe section formed with an aperture and a raised perimeter around the aperture.
Description
IMPROVEMENTS IN POLYMER PIPING
TECHNICAL FIELD
[0001] The present invention relates to the forge moulding of polymer piping and, more particularly to the production of HDPE "tee" pieces for large diameter pipes.
BACKGROUND
[0002] The process known in the art of forming "tee" pieces for large diameter pipe work in HDPE has included the initial separate forge moulding of the main pipe section and the branch pipe. An aperture is formed in the main pipe and the branch pipe, after suitable shaping, is butt welded to the main pipe.
[0003] Particularly, in the case of the branch pipe being of a reduced diameter compare to that of the main pipe, significant pressures concentrate in the region above the weld and may cause deformation and bursting of the branch pipe.
[0004] It is an object of the present invention to address or at least ameliorate some of the above disadvantages or provide a useful alternative.
Notes [0005] The term "comprising" (and grammatical variations thereof) is used in this specification in the inclusive sense of "having" or "including", and not in the exclusive sense of "consisting only of".
[0006] The above discussion of the prior art in the Background of the invention, is not an admission that any information discussed therein is citable prior art or part of the common general knowledge of persons skilled in the art in any country.
SUMMARY OF INVENTION
[0007] Accordingly, in a broad form of the invention, there is provided a method of strengthening forge moulded "tee" pieces for polymer pipe work; the method including the provision of a reinforcing collar proximate a junction between a main pipe section and a branch pipe section; the main pipe section formed with an aperture and a raised perimeter around the aperture; wherein the reinforcing collar is an integral portion of a junction piece interposed between the aperture of the main pipe and the branch pipe, and wherein the reinforcing collar has an outer diameter larger than an outer diameter of the branch pipe section.
[0008] Preferably, the junction piece comprising a short pipe section with internal and external diameters conforming to internal and external diameters of the branch pipe section; the integral collar formed as an ef· increased diameter projection projecting from the short pipe section; one end of the junction piece butt-welded to the raised perimeter and the other end of the junction piece welded to an end of the branch pipe section.
[0009] Preferably, the reinforcing collar is machined from a forge moulded billet of a polymer; the reinforcing collar having an internal diameter substantially equal to an external diameter of the branch pipe section.
[00010] In another broad form of the invention, there is provided a tee piece comprising a main pipe section and a branch pipe section formed of a forge moulded polymer material; the main pipe section including an aperture formed in a wall of the. main pipe section; the aperture formed to include a raised perimeter; a diameter of the aperture conforming to an internal diameter of the branch pipe section; the tee piece including a junction piece formed with a reinforcing collar; the junction piece interposed between the raised perimeter of the main pipe section and an end of the branch pipe; the reinforcing collar having an outer diameter larger than an outer diameter of the branch pipe section.
[00011] In another preferred embodiment of the invention, there is provided a method of strengthening forge moulded "tee" pieces for polymer pipe work; the method including the provision of a reinforcing collar proximate a junction between a main pipe section and a branch pipe section.
[00012] Preferably, the reinforcing collar is an integral portion of a junction piece; the junction piece comprising a short pipe section with internal and external diameters conforming to internal and external diameters of the branch pipe section; the junction piece including an integral collar of increased diameter projecting from the short pipe section.
[00013] Preferably, the junction piece is interposed between the main pipe section and the branch pipe section; a first end of the junction piece welded to a perimeter of an aperture in the main pipe section; an end of the branch pipe section welded to a second end of the junction piece.
[00014] In another preferred form of the invention, there is provided a method of strengthening a portion of a branch pipe section of a reducing tee piece; the method including providing a collar at a region of the branch pipe section proximate a junction of the branch pipe section with a main pipe section of the tee piece.
[00015] Preferably, the branch pipe section is welded to a perimeter of an aperture in the main pipe section.
[00016] Preferably, the reinforcing collar is machined from a forge moulded billet of the polymer or a metallic material; the reinforcing collar having an internal diameter substantially equal to an external diameter of the branch pipe section.
[00017] Preferably, the collar comprises a collar machined from a billet of HDPE material.
[00018] Preferably, the collar is assembled over the branch pipe section adjacent to the main pipe section as a close sliding fit.
[00019] Preferably, the collar is positioned proximate the outer surface of the main pipe section after the branch pipe section has been welded to the main pipe section.
[00020] In another broad form of the invention, there is provided a tee piece formed of a forge moulded polymer material; the tee piece comprising a main pipe section, a branch pipe section and a reinforcing collar at a junction of the tee piece.
[00021] Preferably, the main pipe section includes an aperture formed in a wall of the main pipe section; the aperture formed to include a raised perimeter; a diameter of the aperture conforming to an internal aperture of the branch pipe section.
[00022] Preferably, the reinforcing collar comprises a section of pipe of inner and outer diameters conforming to inner and outer diameters of the branch pipe section; the reinforcing collar including a section having an outer diameter larger than the outer diameter of the branch pipe section.
[00023] Preferably, the reinforcing collar is interposed between the aperture of the main pipe section and the branch pipe section; a first end of the reinforcing collar butt welded to the perimeter of the aperture in the main pipe section and the branch pipe section butt welded to a second end of the reinforcing collar.
[00024] Preferably, the reinforcing collar is machined from a billet of polymer or other suitable material; the inner diameter of the reinforcing collar conforming to the outer diameter of the branch pipe section.
[00025] Preferably, the branch pipe section is butt welded to the perimeter of the aperture in the main pipe section; the reinforcing collar slid over the branch pipe section to seat proximate an external surface of the main pipe section.
BRIEF DESCRIPTION OF DRAWINGS
[00026] Embodiments of the present invention will now be described with reference to the accompanying drawings wherein: [00027] Figure 1 a polymer "tee" piece according to prior art, [00028] Figure 2 is a perspective view of the components for forming a tee piece according to a first embodiment according to the invention, [00029] Figure 3 is a side view of a tee piece formed of the components of Figure 2 after assembly, [00030] Figure 4 is a side view of a tee piece assembly according to a second preferred embodiment of the invention, [00031] Figure 5 is a perspective view of the assembly of Figure 4.
DESCRIPTION OF EMBODIMENTS
[00032] Conventionally as shown in Figure 1 (Prior Art) a reducing tee is formed by providing an aperture with a raised perimeter in a main pipe section, then welding the branch pipe to the main pipe at the aperture. It has been found that the region of the branch pipe section above the welded junction is liable to distortion and even failure.
First Preferred Embodiment [00033] With reference to Figure 2 and 3, in a first preferred embodiment of the invention, a "tee" junction 10 is formed of a main pipe section 12, a branch pipe section 14 and a junction piece 16.
[00034] Main pipe section 12 is forge moulded in HDPE or other suitable polymer to include an aperture 18 with a raised perimeter 20. After heating of the main pipe section to approximately 150degrees centigrade, the raised perimeter is formed by drawing a die through the wall of the pipe.
The die is retained in place until the pipe cools to room temperature to prevent the reversion of the forged pipe.
The raised perimeter is then machined to forma level surface suitable for but welding.
[00035] The formed aperture 18 is of a diameter to suit the internal diameter of the branch pipe section 14. The external diameter of the raised perimeter may be equal to the external diameter of the branch pipe section 14 or be larger, for example to give a wall thickness at the aperture equal to the wall thickness of the main pipe section 12.
[00036] The junction piece 16 forms a separate reinforcing section which is machined from forge moulded HDPE or the other suitable polymer material. The junction piece 16 comprises a short section of pipe 22 of internal and external diameters conforming to the diameters of the branch pipe section 14 and includes an integral projecting reinforcing collar 24 of increased external diameter.
[00037] As shown in Figure 3, for assembly, the junction piece 16 is interposed between the perimeter of the aperture in the main pipe section and the branch pipe section. The lower, or first end of the junction piece 16 is butt-welded to the perimeter 20 of the aperture in the main pipe 12, and the branch pipe section 14 likewise butt-welled to upper or second end of the junction piece.
Second Preferred Embodiment [00038] In a second preferred embodiment of the invention, a main pipe section 30 and a branch pipe section 32 are forge moulded as for the first embodiment described above, and the main pipe section 30 again provided with the aperture and raised perimeter around the aperture to suit the branch pipe section 32.
[00039] In this embodiment however, the branch pipe section 32 is directly butt-welded to the perimeter of the aperture of the main pipe section 30. A reinforcing collar 34 is machined, either from a forge moulded billet of HDPE, another suitable polymer or composite material, or from a metallic material. The internal diameter of the collar is sized so as to fit over branch pipe section 32 as a close sliding fit.
[00040] After welding of the branch pipe section 32 to the main pipe section 30, the collar 34 is slid along the branch pipe section 32 to seat in close proximity to the outer surface of the main pipe, just above the butt-welded junction of the branch pipe and main pipe sections. This strengthens the area liable to distortion and rupture just above the weld.
INDUSTRIAL APPLICABILITY
[00041] The present invention provides for HDPE pipe tee pieces capable of handling increased line pressures without the need to increase overall pipe wall thickness.
Claims (4)
1. A method of strengthening forge moulded "tee" pieces for polymer pipe work; the method including the provision of a reinforcing collar proximate a junction between a main pipe section and a branch pipe section; the main pipe section formed with an aperture and a raised perimeter around the aperture; wherein the reinforcing collar is an integral outwardly projecting portion of a junction piece interposed between the aperture of the main pipe and the branch pipe, and wherein the reinforcing collar has an outer diameter larger than an outer diameter of the branch pipe section.
2. The method of claim 1 wherein the junction piece comprising a short pipe section with internal and external diameters conforming to internal and external diameters of the branch pipe section; the integral collar formed as an ef1 increased diameter projection projecting from the short pipe section; one end of the junction piece butt-welded to the raised perimeter and the other end of the junction piece welded to an end of the branch pipe section.
3. The method of claim 1 wherein the junction piece and integral reinforcing collar is machined from a forge • moulded billet of a polymer; the reinforcing collar having an internal diameter substantially equal to an external diameter of the branch pipe section.
4. A tee piece comprising a main pipe section and a branch pipe section formed of a forge moulded polymer material; the main pipe section including an aperture formed in a wall of the main pipe section; the aperture formed to include a raised perimeter; a diameter of the aperture conforming to an internal diameter of the branch pipe section; the tee piece including a junction piece formed with an integral reinforcing collar; the junction piece interposed between the raised perimeter of the main pipe section and an end of the branch pipe; the reinforcing collar having an outer diameter larger than an outer diameter of the branch pipe section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2015101853A AU2015101853B4 (en) | 2015-12-15 | 2015-12-31 | Improvements in Polymer Piping |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2015905196 | 2015-12-15 | ||
| AU2015905196A AU2015905196A0 (en) | 2015-12-15 | Improvements in Polymer Piping | |
| AU2015101853A AU2015101853B4 (en) | 2015-12-15 | 2015-12-31 | Improvements in Polymer Piping |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU2015101853A4 AU2015101853A4 (en) | 2016-02-18 |
| AU2015101853B4 true AU2015101853B4 (en) | 2016-10-06 |
Family
ID=55306636
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2015101853A Expired AU2015101853B4 (en) | 2015-12-15 | 2015-12-31 | Improvements in Polymer Piping |
Country Status (1)
| Country | Link |
|---|---|
| AU (1) | AU2015101853B4 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1431649A2 (en) * | 2002-12-18 | 2004-06-23 | REINERT. RITZ GmbH | Plastic T-branch unit |
| US20040124632A1 (en) * | 2001-04-09 | 2004-07-01 | Matti Jokinen | T pipe for connecting a reduced branch pipe to a main pipe and a method for producing such a t pipe |
| UA72986U (en) * | 2012-01-24 | 2012-09-10 | Общество С Ограниченной Ответственностью "Научно-Производственное Предприятие "Центральный Конструкторско-Технологический Институт Арматуростроения" | Method of manufacturing tees from forging blanks by stamping |
-
2015
- 2015-12-31 AU AU2015101853A patent/AU2015101853B4/en not_active Expired
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040124632A1 (en) * | 2001-04-09 | 2004-07-01 | Matti Jokinen | T pipe for connecting a reduced branch pipe to a main pipe and a method for producing such a t pipe |
| EP1431649A2 (en) * | 2002-12-18 | 2004-06-23 | REINERT. RITZ GmbH | Plastic T-branch unit |
| UA72986U (en) * | 2012-01-24 | 2012-09-10 | Общество С Ограниченной Ответственностью "Научно-Производственное Предприятие "Центральный Конструкторско-Технологический Институт Арматуростроения" | Method of manufacturing tees from forging blanks by stamping |
Non-Patent Citations (1)
| Title |
|---|
| PIHA 2008 TECHNICAL DATA CHART * |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2015101853A4 (en) | 2016-02-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FGI | Letters patent sealed or granted (innovation patent) | ||
| FF | Certified innovation patent | ||
| MK22 | Patent ceased section 143a(d), or expired - non payment of renewal fee or expiry |