CA2039418A1 - Pipe joint - Google Patents
Pipe jointInfo
- Publication number
- CA2039418A1 CA2039418A1 CA 2039418 CA2039418A CA2039418A1 CA 2039418 A1 CA2039418 A1 CA 2039418A1 CA 2039418 CA2039418 CA 2039418 CA 2039418 A CA2039418 A CA 2039418A CA 2039418 A1 CA2039418 A1 CA 2039418A1
- Authority
- CA
- Canada
- Prior art keywords
- halves
- pipe
- nuts
- split
- bolts
- 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.)
- Abandoned
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
- F16L23/00—Flanged joints
- F16L23/02—Flanged joints the flanges being connected by members tensioned axially
- F16L23/024—Flanged joints the flanges being connected by members tensioned axially characterised by how the flanges are joined to, or form an extension of, the pipes
- F16L23/028—Flanged joints the flanges being connected by members tensioned axially characterised by how the flanges are joined to, or form an extension of, the pipes the flanges being held against a shoulder
- F16L23/0283—Flanged joints the flanges being connected by members tensioned axially characterised by how the flanges are joined to, or form an extension of, the pipes the flanges being held against a shoulder the collar being integral with the pipe
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L23/00—Flanged joints
- F16L23/02—Flanged joints the flanges being connected by members tensioned axially
- F16L23/032—Flanged joints the flanges being connected by members tensioned axially characterised by the shape or composition of the flanges
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Flanged Joints, Insulating Joints, And Other Joints (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
Abstract
Abstract The object of the invention is to provide a secure pipe joint for high pressures when using split flanges for embracing respective pipe ends. Corresponding flange halves are interconnected across the joint by means of bolts and nuts, and the two halves of each split flange are joined together by means of two connection plates each gripping two of said bolts.
(Fig. 2)
(Fig. 2)
Description
;~394~3 Pipe joint The present invention relates to a pipe joint comprising at least one split flange with two halves which together embrace a respectlve pipe end, each flange half being clamped across the joint by means of bolts. The bolts interat with nuts when two pipes are joined together, or with threaded bores when a pipe is joined to a fixed connection, such as a pump.
Flanges in one piece are secure but often difficult to mount. Flanges split in two semi-circular halves are easier to mount but less secure than flanges in one piece. For example, when joining two pipes, a split flange can be used on one side only of the joint, and even then there remains a risk that the halves of the split flanges lose their grip around the pipe end due to lateral forces which gradually tend to bend the clamping bolts. The situation is the same when a pipe is ioined to a fixed connection, such as a pump.
Because of this risk, one-piece clamping flanges have been considered necessary for high pressure joints.
The object of the present invention is to provide a novel pipe joint, with split flanges.
The pipe joint of the invention is mainly characterized in that the two halves of each split flange are joined together by means of at least one connection plate gripping two of said boltsx~ ~h~ s;l~
O C~- ~C ~C~ c~ p\;S~ 5s\C~nqC ~
A preferred embodiment of ~the invention for joining two pipe ends comprises two split flanges each having two halves together embracing a respective pipe end, corresponding halves being - joined together across the joint by means of clamping bolts interacting with nuts. The two halves of each e Co~ ec~;Or~ c ~0~9~-~ 8 ~ o~)~Si~e, OS, ~
hc~ s, e~c~Ig~ s~c-t 1~d c,~, c~ be Lse2 2 ¦ Can~Lc~ n ~it~ fh~
~. ~h~ cO~c~r~
split flan~e are joined together by means of two connection plates each gripping two o~ said bolts~o~ t~ \
.ts l`de a$ ~he, ~.~o l~loc~ oS +~ ~ t ~lo.nqe, .
The connection plates eliminate~the risk split 1anges losing their grip. ~ preferably provided with tongues arranged to be bent over the bolt heads and the nuts, respectively. These bent tongues prevent the loosening of the clamping bolts and nuts under the influence of vibration.
In order to acilitate initial positioning of the nuts, annular tapes with an adhesive on both sides may be used. The tapes are placed around the ; bolt apertures of the connection plates so as to keep the nuts temporarily in place, which facilitates the installation of the pipe joint.
In addition to securing the pipe joint, the connection plates facilitate the installation of the joint. One connection plate may be pre-mounted to keep the flange halves together while the bolts act as hinges.
In a preferred embodiment of the invention, the ends which the flanges are arranged to embrace are formed by weld nipples welded to the respective pipe so that the weld joints have a diameter greater than the inner diameter of the flanges. In this embodiment, the inner diameter of the weld nipples is substantially the same as the inner diameter of the pipes so that the wall thickness of the weld nipples need not be overdimensioned.
In the following, the invention will be described in greater detail with reference to two e~emplifying embodiments shown in the attached draw-ing.
Figures l and 3 are partial sectional side views of two embodiments of the invention.
Figures 2 and 4 are end views of the two 3 2:~39~
embodiments, respectively.
In Figure 1, the reference numerals 1 and 2 designate two pipes to be joined together. The ends of the pipes 1 and 2 are inserted in and welded to sockets of two weld nipples 3 and 4, which are bent inwards so that nipple portions 5 to be positioned against each other are substantiially in level with the pipes 1 and 2. The abutting ends of the nipples 3 and 4 are provided with conventional shoulders 6 and 7 against which flange halves 8, 18 and 9, 19 of two split flanges, respectively, are arranged to be posi-tioned. The flange halves 8, 9 and 18, 19 are inter-connected by means of bolt joints 10, 11 in a manner known per se.
To ensure that the flange halves will not lose their grip around the shoulders 6 and 7 of the nipples 3 and 4, and to facilitate the installation of the pipe joint, the flange halves are joined together by means of connection plates 12, 14 and 13 ~\~ ~tsi~ es Oc ~ C~ 5p ~
15, respectlve-lyl. lne connection pI-a~es are provided with apertures through which the bolts 10 can be passed. The plates 12 to 15 need not usually be thicker than about 1 mm. The connection plates are - preferably provided with tongues (not shown) project-ing from the edges. These tongues can be bent over the bolt head or nut to prevent them from loosening ; due to vibration.
The flange halves 8, 18 and/or 9, 19, respect-ively, may be interconnected in advance at one end, for example, by means of the plate 14, which facilit-ates the installation of the joint. In order to further facilitate the installation, annular tapes with an adhesive on both sides can be placed in advance around the apertures provided in the connec-tion plates 12 to 15 for the bolts lO, whereby the ~0~9418 nuts 11 can be pre-mounted temporarily in place.
The embodiment shown in F'igures 3 and 4 is similar to the above-described ernbodiment of Figures 1 and 2, except that the ends of the pipes 20 and 21 in Figures 3 and 4 are collared as well as the abutting ends of the weld nipples 22 and 23, so that the weld joint 24 is preferably of the type described in greater detail in the international patent application FI 87/00099.
The two embodiments shown in the drawings are advantageous in saving material, and they provide pipe joints with substantially smooth inner surface.
In Figure l, a seal is provided between the end sur-face of the pipe 1 and the narrower portion 5 of the weld nipple 3. The seal prevents the entry of im-purities between the~socket portion of the nipple 3 and the outer surface of the pipe l, while it also reduces the radial outward force acting on the socket portion of the nipple 3:.
.
Flanges in one piece are secure but often difficult to mount. Flanges split in two semi-circular halves are easier to mount but less secure than flanges in one piece. For example, when joining two pipes, a split flange can be used on one side only of the joint, and even then there remains a risk that the halves of the split flanges lose their grip around the pipe end due to lateral forces which gradually tend to bend the clamping bolts. The situation is the same when a pipe is ioined to a fixed connection, such as a pump.
Because of this risk, one-piece clamping flanges have been considered necessary for high pressure joints.
The object of the present invention is to provide a novel pipe joint, with split flanges.
The pipe joint of the invention is mainly characterized in that the two halves of each split flange are joined together by means of at least one connection plate gripping two of said boltsx~ ~h~ s;l~
O C~- ~C ~C~ c~ p\;S~ 5s\C~nqC ~
A preferred embodiment of ~the invention for joining two pipe ends comprises two split flanges each having two halves together embracing a respective pipe end, corresponding halves being - joined together across the joint by means of clamping bolts interacting with nuts. The two halves of each e Co~ ec~;Or~ c ~0~9~-~ 8 ~ o~)~Si~e, OS, ~
hc~ s, e~c~Ig~ s~c-t 1~d c,~, c~ be Lse2 2 ¦ Can~Lc~ n ~it~ fh~
~. ~h~ cO~c~r~
split flan~e are joined together by means of two connection plates each gripping two o~ said bolts~o~ t~ \
.ts l`de a$ ~he, ~.~o l~loc~ oS +~ ~ t ~lo.nqe, .
The connection plates eliminate~the risk split 1anges losing their grip. ~ preferably provided with tongues arranged to be bent over the bolt heads and the nuts, respectively. These bent tongues prevent the loosening of the clamping bolts and nuts under the influence of vibration.
In order to acilitate initial positioning of the nuts, annular tapes with an adhesive on both sides may be used. The tapes are placed around the ; bolt apertures of the connection plates so as to keep the nuts temporarily in place, which facilitates the installation of the pipe joint.
In addition to securing the pipe joint, the connection plates facilitate the installation of the joint. One connection plate may be pre-mounted to keep the flange halves together while the bolts act as hinges.
In a preferred embodiment of the invention, the ends which the flanges are arranged to embrace are formed by weld nipples welded to the respective pipe so that the weld joints have a diameter greater than the inner diameter of the flanges. In this embodiment, the inner diameter of the weld nipples is substantially the same as the inner diameter of the pipes so that the wall thickness of the weld nipples need not be overdimensioned.
In the following, the invention will be described in greater detail with reference to two e~emplifying embodiments shown in the attached draw-ing.
Figures l and 3 are partial sectional side views of two embodiments of the invention.
Figures 2 and 4 are end views of the two 3 2:~39~
embodiments, respectively.
In Figure 1, the reference numerals 1 and 2 designate two pipes to be joined together. The ends of the pipes 1 and 2 are inserted in and welded to sockets of two weld nipples 3 and 4, which are bent inwards so that nipple portions 5 to be positioned against each other are substantiially in level with the pipes 1 and 2. The abutting ends of the nipples 3 and 4 are provided with conventional shoulders 6 and 7 against which flange halves 8, 18 and 9, 19 of two split flanges, respectively, are arranged to be posi-tioned. The flange halves 8, 9 and 18, 19 are inter-connected by means of bolt joints 10, 11 in a manner known per se.
To ensure that the flange halves will not lose their grip around the shoulders 6 and 7 of the nipples 3 and 4, and to facilitate the installation of the pipe joint, the flange halves are joined together by means of connection plates 12, 14 and 13 ~\~ ~tsi~ es Oc ~ C~ 5p ~
15, respectlve-lyl. lne connection pI-a~es are provided with apertures through which the bolts 10 can be passed. The plates 12 to 15 need not usually be thicker than about 1 mm. The connection plates are - preferably provided with tongues (not shown) project-ing from the edges. These tongues can be bent over the bolt head or nut to prevent them from loosening ; due to vibration.
The flange halves 8, 18 and/or 9, 19, respect-ively, may be interconnected in advance at one end, for example, by means of the plate 14, which facilit-ates the installation of the joint. In order to further facilitate the installation, annular tapes with an adhesive on both sides can be placed in advance around the apertures provided in the connec-tion plates 12 to 15 for the bolts lO, whereby the ~0~9418 nuts 11 can be pre-mounted temporarily in place.
The embodiment shown in F'igures 3 and 4 is similar to the above-described ernbodiment of Figures 1 and 2, except that the ends of the pipes 20 and 21 in Figures 3 and 4 are collared as well as the abutting ends of the weld nipples 22 and 23, so that the weld joint 24 is preferably of the type described in greater detail in the international patent application FI 87/00099.
The two embodiments shown in the drawings are advantageous in saving material, and they provide pipe joints with substantially smooth inner surface.
In Figure l, a seal is provided between the end sur-face of the pipe 1 and the narrower portion 5 of the weld nipple 3. The seal prevents the entry of im-purities between the~socket portion of the nipple 3 and the outer surface of the pipe l, while it also reduces the radial outward force acting on the socket portion of the nipple 3:.
.
Claims (5)
1. Pipe joint comprising at least one split flange with two halves which together embrace a respective pipe end, each flange half being clamped by means of bolts across the joint, the two halves of the split flange being joined together by means of at least one connection plate gripping two of said blots on the outside of the two halves of the split flange.
2. Pipe joint according to claim 1 for joining two pipes, comprising two split flanges each having two halves embracing a respective pipe end, cor-responding halves being joined together across the joint by means of bolts and nuts; and said two halves of each split flange being joined together by means of two connection plates each gripping two of said bolts on the outside of said two halves of each split flange.
3. Pipe joint according to claim 2, wherein the pipe ends which the flanges are arranged to embrace are formed by nipples welded to the respective pipe so that the diameter of the weld joint is greater than the inner diameter of the flanges.
4. Pipe joint according to claim 2, wherein the connection plates are provided with tongues arranged to be bent over the respective bolt heads or nuts.
5. Pipe joint according to claim 2, wherein the nuts are provided with annular tapes with an adhesive on both sides for initial positioning of said nuts.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI901663A FI87833C (en) | 1990-04-02 | 1990-04-02 | ROERFOERBINDNING |
| FI901663 | 1990-04-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2039418A1 true CA2039418A1 (en) | 1991-10-03 |
Family
ID=8530194
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2039418 Abandoned CA2039418A1 (en) | 1990-04-02 | 1991-03-28 | Pipe joint |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JPH0565984A (en) |
| CA (1) | CA2039418A1 (en) |
| DE (1) | DE4110415A1 (en) |
| FI (1) | FI87833C (en) |
| FR (1) | FR2660406A1 (en) |
| GB (1) | GB2242719B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6065784A (en) * | 1998-06-12 | 2000-05-23 | Ebaa Iron, Inc. | Pipe joint restraint ring with multiple inside radii |
| CN103557387B (en) * | 2013-10-15 | 2016-04-20 | 莱芜钢铁集团有限公司 | Flanged connection system and flange connecting apparatus thereof |
| KR101678151B1 (en) * | 2015-06-05 | 2016-11-21 | 주식회사 코셉솔루션 | Pipe fastening devices |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE267949C (en) * | ||||
| DE318976C (en) * | 1920-02-21 | Mannesmann Ag | Link flange connection for pipes | |
| US3515416A (en) * | 1968-10-03 | 1970-06-02 | Gen Signal Corp | Flange type swivel fitting |
| US3549179A (en) * | 1969-05-14 | 1970-12-22 | Aeroquip Corp | Split flange connection |
| SE459277B (en) * | 1984-07-31 | 1989-06-19 | Lars B Ohlsson | DOUBLE FLAIR LINES JOINING CLASSIFIED RUBBER PARTS AND SIMILAR |
| DE3701050A1 (en) * | 1987-01-15 | 1988-07-28 | Rhydcon Groten Gmbh & Co Kg | Process for the axial connection of pipes with the aid of half-shell flanges and a flange plate |
| US4921284A (en) * | 1989-04-28 | 1990-05-01 | Fmc Corporation | High strength split clamp for pipe flanges |
-
1990
- 1990-04-02 FI FI901663A patent/FI87833C/en active IP Right Grant
-
1991
- 1991-03-28 CA CA 2039418 patent/CA2039418A1/en not_active Abandoned
- 1991-03-28 GB GB9106667A patent/GB2242719B/en not_active Expired - Fee Related
- 1991-03-29 DE DE19914110415 patent/DE4110415A1/en not_active Withdrawn
- 1991-04-02 FR FR9103960A patent/FR2660406A1/en active Pending
- 1991-04-02 JP JP3094868A patent/JPH0565984A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| GB2242719B (en) | 1993-06-16 |
| GB2242719A (en) | 1991-10-09 |
| FI87833B (en) | 1992-11-13 |
| FR2660406A1 (en) | 1991-10-04 |
| JPH0565984A (en) | 1993-03-19 |
| FI901663A0 (en) | 1990-04-02 |
| GB9106667D0 (en) | 1991-05-15 |
| FI901663A (en) | 1991-10-03 |
| DE4110415A1 (en) | 1991-10-10 |
| FI87833C (en) | 1993-02-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |