EP0580799A1 - Elbow fittings for double containment pipe assemblies - Google Patents
Elbow fittings for double containment pipe assembliesInfo
- Publication number
- EP0580799A1 EP0580799A1 EP92917277A EP92917277A EP0580799A1 EP 0580799 A1 EP0580799 A1 EP 0580799A1 EP 92917277 A EP92917277 A EP 92917277A EP 92917277 A EP92917277 A EP 92917277A EP 0580799 A1 EP0580799 A1 EP 0580799A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pipe
- fittings
- fitting
- elbow
- straight
- 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.)
- Withdrawn
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
- F16L39/00—Joints or fittings for double-walled or multi-channel pipes or pipe assemblies
- F16L39/005—Joints or fittings for double-walled or multi-channel pipes or pipe assemblies for concentric pipes
Definitions
- a double containment piping system that is constructed of an interconnecting part as described above, actually increases the chance that failure to the external environment can occur as compared to a singular containment piping system designed with proper treatment of the thermal expansion of its components.
- Another problem with existing systems has to do with the ability to combine different inner and outer pipe materials in an efficient manner.
- Different materials can mean materials that are of a different class, (such as metallic-thermoplastic, metallic-reinforced thermosetting plastic, or thermoplastic-reinforced thermosetting plastic) , or materials that are within the same class but constitute a different material, (such as within the thermoplastic family, combining a fluoropolymer within a polyolefin, or a polyolefin within another polyolefin) .
- a standard radius pattern can be used as the basis for the primary and secondary containment fittings. This will allow some conformity to conventional elbows, although the conventional elbow styles are not intended to produce adequate flow conditions in a double containment piping system.
- FIGURE 3 is a cross-sectional view illustrating the use of a pair of elbow pipe fittings of FIGURE 1 in a double containment pipe assembly of the present invention
- FIGURE 4 is a cross-sectional view illustrating the use of a pair of elbow pipe fittings of FIGURE 2 in a double containment pipe assembly of the present invention
- FIGURE 5 is a cross-sectional view illustrating a concentric elbow pipe fitting wherein the inner pipe has straight line extensions at either end; and
- FIGURE 6 is a cross-sectional view illustrating the f the elbow fitting of FIGURE 5.
- elbow fittings of the present invention are indicated by the numeral 10 and 12 and are used as a connection between straight portions of a double containment pipe assembly (not shown) .
- the inner/outer pipe can have or be provided with the straight portions at both of its ends, if desired, and the standardized system could have one length of inner and one length of outer pipe.
- the material can be matched to the inner and outer pipe material of the straight length sections between elbow fittings.
- the portions of the double containment assembly between elbow fittings can be modular in that, if a leak occurs, it is only necessary to repair and replace one section of the pipe assembly.
- Utilizing concentric elbow fittings enables the maximum spacing to be achieved between the fittings so as to provide for thermal expansion and contraction without potential contact between the fittings which may cause disruption or cracking, and by utilizing such a system, improved flow through the system is achieved along with more uniform heat transfer.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Thermal Insulation (AREA)
Abstract
Ensemble de confinement à canalisation double possédant des parties courbées constituées d'éléments coudés (10, 12) s'étendant entre les parties droites d'un ensemble de canalisations concentriques interne et externe. Les coudes (10, 12) occupent le même secteur angulaire d'un cercle et sont concentriques entre eux. L'écartement entre les surfaces interne et externe courbées des coudes (10, 12) est égal et identique sur la totalité du rayon de courbure des coudes. Ceci assure une protection maximale contre tout contact entre les coudes interne et externe (10, 12) lors de la dilatation et de la contraction thermiques de la canalisation. On peut fixer les parties droites (18, 20) de la canalisation à des faces opposées (14, 16) des coudes afin de faciliter la fabrication dudit ensemble de confinement à double canalisation là où il sera utilisé. On peut fixer les parties droites aux faces terminales (14, 16) des coudes en les soudant bout à bout ou au moyen des techniques de soudage bout à bout enroulé, ou bien en les emboîtant dans des douilles (14', 16') prévues au niveau des faces terminales.Double pipe containment assembly having curved parts made of bent elements (10, 12) extending between the straight parts of a set of internal and external concentric pipes. The elbows (10, 12) occupy the same angular sector of a circle and are concentric with one another. The spacing between the inner and outer curved surfaces of the elbows (10, 12) is equal and identical over the entire radius of curvature of the elbows. This provides maximum protection against contact between the inner and outer elbows (10, 12) during thermal expansion and contraction of the pipe. The straight parts (18, 20) of the pipe can be fixed to opposite faces (14, 16) of the elbows in order to facilitate the manufacture of said double-pipe containment assembly where it will be used. The straight parts can be fixed to the end faces (14, 16) of the elbows by welding them end to end or by means of rolled up butt welding techniques, or else by fitting them into sockets (14 ', 16') provided at the end faces.
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US68132491A | 1991-04-04 | 1991-04-04 | |
US681324 | 1991-04-04 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0580799A1 true EP0580799A1 (en) | 1994-02-02 |
EP0580799A4 EP0580799A4 (en) | 1994-05-11 |
Family
ID=24734791
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19920917277 Withdrawn EP0580799A4 (en) | 1991-04-04 | 1992-04-03 | Elbow fittings for double containment pipe assemblies |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0580799A4 (en) |
AU (1) | AU1797192A (en) |
CA (1) | CA2107562A1 (en) |
WO (1) | WO1992017725A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN201233007Y (en) * | 2007-08-06 | 2009-05-06 | 国际壳牌研究有限公司 | Combustor |
US11982389B2 (en) * | 2022-09-16 | 2024-05-14 | K.D.W. Company Limited | Double containment fittings for connecting double containment tubing |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE399192C (en) * | 1920-05-31 | 1924-07-28 | Cfcmug | Pipe connection for concentric pipelines |
EP0328094A2 (en) * | 1988-02-08 | 1989-08-16 | Joh. Vaillant GmbH u. Co. | Doublewalled pipe and connection of coaxial doublewalled pipe sections by means of a connection piece consisting of such a doublewalled pipe |
DE3836326A1 (en) * | 1988-10-25 | 1990-04-26 | Tscherwitschke Gmbh Richard | Connecting piece for connecting at least two pipelines which run in different directions and consist, in particular, of thermoplastic, and a process for producing the connecting piece |
DE9101646U1 (en) * | 1990-02-20 | 1991-05-02 | Joh. Vaillant Gmbh U. Co, 5630 Remscheid | Connecting arch |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2002470A (en) * | 1935-05-21 | Method of making elbow pipe ftc | ||
US2761949A (en) * | 1954-09-29 | 1956-09-04 | Fluid Systems Inc | Prefabricated pipe system |
US4786088A (en) * | 1987-06-25 | 1988-11-22 | Asahi/America, Inc. | Double-containment thermoplastic pipe assembly |
US4886305A (en) * | 1988-08-12 | 1989-12-12 | Fibercast Company | Double containment pipe fittings and apparatus to adhesively install the same |
-
1992
- 1992-04-03 AU AU17971/92A patent/AU1797192A/en not_active Abandoned
- 1992-04-03 CA CA002107562A patent/CA2107562A1/en not_active Abandoned
- 1992-04-03 EP EP19920917277 patent/EP0580799A4/en not_active Withdrawn
- 1992-04-03 WO PCT/US1992/002684 patent/WO1992017725A1/en not_active Application Discontinuation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE399192C (en) * | 1920-05-31 | 1924-07-28 | Cfcmug | Pipe connection for concentric pipelines |
EP0328094A2 (en) * | 1988-02-08 | 1989-08-16 | Joh. Vaillant GmbH u. Co. | Doublewalled pipe and connection of coaxial doublewalled pipe sections by means of a connection piece consisting of such a doublewalled pipe |
DE3836326A1 (en) * | 1988-10-25 | 1990-04-26 | Tscherwitschke Gmbh Richard | Connecting piece for connecting at least two pipelines which run in different directions and consist, in particular, of thermoplastic, and a process for producing the connecting piece |
DE9101646U1 (en) * | 1990-02-20 | 1991-05-02 | Joh. Vaillant Gmbh U. Co, 5630 Remscheid | Connecting arch |
Non-Patent Citations (1)
Title |
---|
See also references of WO9217725A1 * |
Also Published As
Publication number | Publication date |
---|---|
CA2107562A1 (en) | 1992-10-05 |
WO1992017725A1 (en) | 1992-10-15 |
EP0580799A4 (en) | 1994-05-11 |
AU1797192A (en) | 1992-11-02 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 19931103 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT DE FR GB IT NL SE |
|
RHK1 | Main classification (correction) |
Ipc: F16L 39/00 |
|
A4 | Supplementary search report drawn up and despatched |
Effective date: 19940328 |
|
AK | Designated contracting states |
Kind code of ref document: A4 Designated state(s): AT DE FR GB IT NL SE |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: DOUBLE CONTAINMENT SYSTEMS CORP. |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 19941101 |