EP0130372A1 - Method for the sectional drying of pipelines - Google Patents
Method for the sectional drying of pipelines Download PDFInfo
- Publication number
- EP0130372A1 EP0130372A1 EP84106164A EP84106164A EP0130372A1 EP 0130372 A1 EP0130372 A1 EP 0130372A1 EP 84106164 A EP84106164 A EP 84106164A EP 84106164 A EP84106164 A EP 84106164A EP 0130372 A1 EP0130372 A1 EP 0130372A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- evacuation
- purge gas
- flow
- gas
- point
- 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.)
- Granted
Links
- 238000001035 drying Methods 0.000 title claims abstract description 12
- 238000000034 method Methods 0.000 title claims description 16
- 238000010926 purge Methods 0.000 claims abstract description 25
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract 2
- 239000007789 gas Substances 0.000 claims description 26
- 238000011010 flushing procedure Methods 0.000 claims description 12
- 239000003570 air Substances 0.000 claims description 11
- 239000012080 ambient air Substances 0.000 claims description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims 2
- 229910052756 noble gas Inorganic materials 0.000 claims 2
- 239000007788 liquid Substances 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- 229910052757 nitrogen Inorganic materials 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 21
- 238000001291 vacuum drying Methods 0.000 abstract description 3
- 238000007605 air drying Methods 0.000 abstract 1
- 238000009833 condensation Methods 0.000 abstract 1
- 230000005494 condensation Effects 0.000 abstract 1
- 230000005012 migration Effects 0.000 abstract 1
- 238000013508 migration Methods 0.000 abstract 1
- 238000009792 diffusion process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 241000282887 Suidae Species 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/14—Arrangements for supervising or controlling working operations for eliminating water
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/02—Pipe-line systems for gases or vapours
- F17D1/04—Pipe-line systems for gases or vapours for distribution of gas
Definitions
- the invention relates to a method according to the preamble of claim 1.
- telescopic pipes After completion, telescopic pipes are often subjected to a pressurized water test to test the resilience and tightness of the pipe. Even after repeated pigging of the line, water remains on the pipe walls, which can lead to corrosion in the long term. Even with other lines that are not subjected to a pressure water test, water can get into the interior of the pipe during transport, storage and assembly, which must be removed.
- vacuum drying has been used in the drying of telescopes.
- the use of the vacuum has the advantage of a high diffusion speed and thus relatively faster drying and a good depth effect. Moisture that has accumulated, for example, in duplications of the pipe wall, in material pores, surface grooves or micro cracks can be evaporated and removed by a vacuum.
- a closed line section is evacuated with a vacuum pump, evaporation commencing after reaching a certain negative pressure, so that water vapor increasingly takes the place of the extracted air, which is subsequently sucked off proportionally with further pressure reduction.
- a purge gas for example also dry ambient air, is let into the pipeline. If desired, the procedure is repeated.
- the object of the invention is accordingly to provide a tube drying method using vacuum, which provides high-quality drying in a manageable and clear process over the entire length of the line.
- this object is achieved with the method according to claim 1.
- This solution provides that the purging does not take place from the evacuation point, but from a remote point and at the same time also with an at least initially restricted addition speed or addition quantity. This avoids in particular that the water vapor present in the tube with a negative pressure of a few millibars is enclosed by the flushing gas as it enters and then experiences a pressure rise that goes beyond the saturation point to normal pressure, the previously evaporated water being deposited on the inner walls of the tube.
- a such an effect is inevitable if the evacuation and flushing is carried out from one end of a pipe section, the flushing gas leading to an inclusion of the water vapor even with slow input and trapping the residual water which remains in the pipe.
- a similar effect could also arise if flushing gas is added unthrottled from an end of the pipeline remote from the evacuation point, so that the water vapor experiences a pressure increase on the way to the evacuation point.
- a throttling or flow metering of the flushing gas stream must be maintained until the flushing gas stream reaches the evacuation point or whether the metering can soon be released to a greater or lesser extent depends on the flow properties of the line.
- the introduction of the purge gas can be released after an initial throttling, i.e. unthrottled and with an inlet pressure increased to or even above normal pressure.
- the flow resistance of the line acts as a sufficient throttle to maintain a pressure below the saturation limit in the boundary area to the extracted water vapor. The pressure rising further back does not reach the front of the purge gas.
- pipe drying is preferably carried out in such a way that the evacuation takes place at one end of a closed pipe section and the flushing gas is input at the other end.
- Appropriate handling at several points for example from the point of view of shorter throughput times and thus shorter working hours, is of course possible, for example, evacuation and flooding points can alternately be provided along a pipeline section.
- Dry purge air is let in at the end of the pipeline section opposite the evacuation point, a supercritical nozzle being switched on in the inlet, which limits the purge gas flow to 50 Nm 3 / h, so that the purge gas flow remains behind the suction power of the vacuum pump in terms of its molar flow rate.
- the vacuum pump on the other side of the pipe section remains switched on. After purging air emerges at the evacuation point, the vacuum pump is switched off and the nozzle is removed from the purging air inlet in order to accelerate the further flooding of the pipeline to normal pressure. Additional flooding from the evacuation point is then uncritically possible after the water vapor has been removed from the line.
- a pipe section as in Example I is emptied and evacuated after the pressure water test, as before wrote.
- the flooding of the line with dried purge air takes place in a multi-stage process, which was simulated or calculated beforehand taking into account the flow resistance of the line, the suction power of the vacuum pump and the flow properties of the enclosed gases on a digital computer using the finite element method to ensure that with a gradual release of the purge air supply even in the end part of the extracted water vapor volume, directly in front of the trailing purge air column, there is no pressure increase beyond the saturation pressure and thus recondensation.
- a purge air is first entered through a supercritical nozzle as in Example I. After a predetermined time interval, a bypass with a second, same supercritical nozzle is opened. After further predetermined time intervals, a third and a fourth bypass of the appropriate type are opened. It goes without saying that a single nozzle with a plurality of openings corresponding to a supercritical nozzle can also be used, which are opened one after the other.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Drying Of Solid Materials (AREA)
- Pipeline Systems (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
Beim Trocknen von Fernrohrleitungen wird in Ausgestaltung der Vakuumtrocknung - ggf. in Verbindung mit Drucklufttrocknung, Molchung und/oder Alkoholtrocknung - eine Flutung geschaffen, die die Rückkondensation des Wassers im Restwasserdampf ausschließt. Dazu ist eine gleichsinnige Bewegung von abgesaugtem Wasserdampf und nachrückendem Spülgas sicherzustellen, wobei das Spülgas in seiner Eingabe- bzw. Wanderungsgeschwindigkeit so zu drosseln ist, daß auch im Grenzbereich zum abziehenden Wasserdampf keine Kondensation auftritt.When drying telescope lines, in the configuration of vacuum drying - possibly in conjunction with compressed air drying, pigging and / or alcohol drying - a flooding is created which precludes the recondensation of the water in the residual water vapor. To do this, ensure that the extracted water vapor and subsequent purge gas move in the same direction, the purge gas being slowed down in its input or migration speed so that no condensation occurs even in the border area to the water vapor being drawn off.
Description
Die Erfindung betrifft ein Verfahren nach dem Oberbegriff des Anspruchs 1.The invention relates to a method according to the preamble of claim 1.
Fernrohrleitungen werden nach der Fertigstellung häufig einer Druckwasserprüfung unterzogen, um die Belastbarkeit und Dichtheit der Leitung zu testen. Dabei verbleibt auch nach wiederholter Molchung der Leitung Wasser an den Rohrwänden, das langfristig zu Korrosion führen kann. Auch bei sonstigen, nicht einer Druckwasserprüfung unterzogenen Leitung kann bei Transport, Lagerung und Montage Wasser in das Rohrinnere gelangt sein, welches entfernt werden muß.After completion, telescopic pipes are often subjected to a pressurized water test to test the resilience and tightness of the pipe. Even after repeated pigging of the line, water remains on the pipe walls, which can lead to corrosion in the long term. Even with other lines that are not subjected to a pressure water test, water can get into the interior of the pipe during transport, storage and assembly, which must be removed.
Bei der Trocknung von Fernrohrleitungen hat neben der Anwendung von Trocknungsluft mit einem gewissen Überdruck, die insbesondere mit der Möglichkeit des Molchtransports auch Wasser- und Schmutzansammlungen aufzulösen vermag, eine Vakuumtrocknung Anwendung gefunden. Die Anwendung des Vakuums hat den Vorteil einer hohen Diffusionsgeschwindigkeit und damit relativ schnelleren Trocknung und einer guten Tiefenwirkung. Feuchtigkeit, die sich beispielsweise in Dopplungen der Rohrwand, in Materialporungen, Oberflächenriefen oder Mikrorissen festgesetzt hat, kann durch Vakuumwirkung verdampft und abgezogen werden.In addition to the use of drying air with a certain overpressure, which can also dissolve water and dirt, especially with the possibility of transporting pigs, vacuum drying has been used in the drying of telescopes. The use of the vacuum has the advantage of a high diffusion speed and thus relatively faster drying and a good depth effect. Moisture that has accumulated, for example, in duplications of the pipe wall, in material pores, surface grooves or micro cracks can be evaporated and removed by a vacuum.
Die praktische Anwendung des Verfahrens sieht dabei üblicherweise vor, daß ein geschlossener Leitungsabschnitt mit einer Vakuumpumpe evakuiert wird, wobei nach Erreichen eines bestimmten Unterdrucks Verdampfung einsetzt, so daß an die Stelle der abgesaugten Luft zunehmend Wasserdampf tritt, der nachfolgend mit weiterer Druckabsenkung anteilig abgesaugt wird. Nach ausreichender Diffusionszeit und nach Erreichen eines vorgegebenen Unterdrucks wird ein Spülgas, z.B. auch trockene Umgebungsluft, in die Rohrleitung eingelassen. Gewünschtenfalls wird der Verfahrensablauf wiederholt.The practical application of the process is more common indicate that a closed line section is evacuated with a vacuum pump, evaporation commencing after reaching a certain negative pressure, so that water vapor increasingly takes the place of the extracted air, which is subsequently sucked off proportionally with further pressure reduction. After a sufficient diffusion time and after reaching a predetermined negative pressure, a purge gas, for example also dry ambient air, is let into the pipeline. If desired, the procedure is repeated.
Die hier zu erwartenden guten Trockningsergebnisse-häben sich in der Praxis aber insoweit nicht bestätigt, als bei derart getrockneten Rohrleitungen jedenfalls bereichsweise Korrosion durch Restfeuchtigkeit bei langzeitiger Überwachung festzustellen war. Die herkömmliche Vakuumtrocknung hatte auch in den Fällen ungleichmäßige Ergebnisse geliefert, in denen (etwa bei langen und engen Leitungen) Druckausgleichs-und Diffusionsvorgängen Zeit gelassen worden war und das Evakuieren und Spülen wiederholt angewandt wurde.The good drying results to be expected here - however, have not been confirmed in practice insofar as corrosion of residual moisture with long-term monitoring could be determined in some areas with pipes dried in this way. Conventional vacuum drying had also given uneven results in cases where (for long and narrow lines, for example) pressure equalization and diffusion processes had been allowed to occur and evacuation and flushing had to be repeated.
Aufgabe der Erfindung ist es dementsprechend, ein Rohrtrocknungsverfahren unter Verwendung von Vakuum zu schaffen, welches über die gesamte Leitungslänge eine hochwertige Trocknung in einem beherrschbaren und übersichtlichen Verfahren liefert.The object of the invention is accordingly to provide a tube drying method using vacuum, which provides high-quality drying in a manageable and clear process over the entire length of the line.
Gemäß der Erfindung wird diese Aufgabe mit dem Verfahren nach dem Anspruch 1 gelöst. Diese Lösung sieht vor, daß das Spülen nicht von der Evakuierungsstelle, sondern von einer abgelegenen Stelle und dabei auch mit einer zumindest zunächst gedrosselten Zugabegeschwindigkeit bzw. Zugabemenge erfolgt. Damit wird insbesondere vermieden, daß der im Rohr mit einem Unterdruck von wenigen Millibar anstehende Wasserdampf bei Eintritt des Spülgases durch dieses eingeschlossen wird und dann einen Druckanstieg erfährt, der über den Sättigungspunkt bis zum Normaldruck hinausgeht, wobei das zuvor verdampfte Wasser an den Rohrinnenwänden niederschlägt. Ein solcher Effekt ist zwangsläufig gegeben, wenn das Evakuieren und Spülen nur von einem Ende eines Rohrleitungsabschnitts aus erfolgt, wobei das Spülgas auch bei langsamer Eingabe zu einem Einschluß des Wasserdampfs führt und das Restwasser gefangen hält, welches im Rohr verbleibt. Ein ähnlicher Effekt könnte aber auch dann entstehen, wenn von einem der Evakuierungsstelle entfernten Ende der Rohrleitung Spülgas ungedrosselt zugegeben wird, so daß der Wasserdampf noch auf dem Weg zur Evakuierungsstelle eine Druckerhöhung erfährt.According to the invention, this object is achieved with the method according to claim 1. This solution provides that the purging does not take place from the evacuation point, but from a remote point and at the same time also with an at least initially restricted addition speed or addition quantity. This avoids in particular that the water vapor present in the tube with a negative pressure of a few millibars is enclosed by the flushing gas as it enters and then experiences a pressure rise that goes beyond the saturation point to normal pressure, the previously evaporated water being deposited on the inner walls of the tube. A such an effect is inevitable if the evacuation and flushing is carried out from one end of a pipe section, the flushing gas leading to an inclusion of the water vapor even with slow input and trapping the residual water which remains in the pipe. A similar effect could also arise if flushing gas is added unthrottled from an end of the pipeline remote from the evacuation point, so that the water vapor experiences a pressure increase on the way to the evacuation point.
Ob eine Drosselung bzw. Durchflußdosierung des Spülgasstroms so lange aufrechterhalten bleiben muß, bis der Spülgasstrom die Evakuierungsstelle erreicht, oder ob die Dosierung schon bald mehr oder weniger stark freigegeben werden kann, hängt von den Strömungseigenschaften der Leitung ab. Bei langen und engen Leitungen und hoher Absauggeschwindigkeit an der Evakuierungsstelle kann die Einleitung des Spülgases nach einer anfänglichen Drosselung freigegeben werden, d.h.,ungedrosselt und mit einem auf oder sogar über Normaldruck erhöhten Einleitungsdruck erfolgen. Der Strömungswiderstand der Leitung wirkt äls-hinreichende Drossel, um im Grenzbereich zum abgesaugten Wasserdampf einen unterhalb der Sättigungsgrenze liegenden Druck zu erhalten. Der weiter hinten ansteigende Druck erreicht die Front des Spülgases nicht.Whether a throttling or flow metering of the flushing gas stream must be maintained until the flushing gas stream reaches the evacuation point or whether the metering can soon be released to a greater or lesser extent depends on the flow properties of the line. In the case of long and narrow lines and a high suction speed at the evacuation point, the introduction of the purge gas can be released after an initial throttling, i.e. unthrottled and with an inlet pressure increased to or even above normal pressure. The flow resistance of the line acts as a sufficient throttle to maintain a pressure below the saturation limit in the boundary area to the extracted water vapor. The pressure rising further back does not reach the front of the purge gas.
Es versteht sich, daß vom gerätetechnischen Aufwand her eine Rohrtrocknung vorzugsweise so durchgeführt wird, daß an einem Ende eines abgeschlossenen Rohrabschnitts die Evakuierung und am anderen Ende die Spülgas-Eingabe erfolgt. Eine entsprechende Handhabung an mehreren Stellen, beispielsweise unter dem Gesichtspunkt kürzerer Durchlaufzeiten und damit verkürzter Arbeitszeiten ist aber selbstverständlich möglich, beispielsweise können längs eines Rohrleitungsabschnitts im Wechsel Evakuierungs- und Flutungsstellen vorgesehen sein.It goes without saying that, in terms of technical equipment, pipe drying is preferably carried out in such a way that the evacuation takes place at one end of a closed pipe section and the flushing gas is input at the other end. Appropriate handling at several points, for example from the point of view of shorter throughput times and thus shorter working hours, is of course possible, for example, evacuation and flooding points can alternately be provided along a pipeline section.
Weitere Merkmale und Vorteile ergeben sich aus den Ansprüchen und der nachfolgenden Beschreibung, in der zwei Ausführungsbeispiele des Gegenstands der Erfindung näher erläutert sind.Further features and advantages result from the claims and the following description, in which two exemplary embodiments of the object of the invention are explained in more detail.
Ein beidendig abgesperrter Abschnitt einer Pipeline von 150 km Länge und einem Innendurchmesser von 0,36 m wird nach der Druckwasserprüfung leergepumpt und durch Molche vorgetrocknet, wobei gleichzeitig eine erste Trocknung durch trockene Luft mit einem Taupunkt von ca minus 40°C erfolgt. Danach wird der Rohrleitungsabschnitt von einem Ende mit einer Vakuumpumpe evakuiert, deren Saugvolumen 3500 m3/h beträgt. Nach einer Evakuierungszeit von 48 Stunden stellt sich ein über die gesamte Leitungslänge hinreichend ausgeglichenes Vakuum von unter 10 mbar ein.A section of a pipeline of 150 km length and an inner diameter of 0.36 m, which is shut off at both ends, is pumped empty after the pressure water test and pre-dried by pigs, whereby at the same time a first drying with dry air with a dew point of approx. Minus 40 ° C takes place. Then the pipe section is evacuated from one end with a vacuum pump, the suction volume of which is 3500 m 3 / h. After an evacuation time of 48 hours, a sufficiently balanced vacuum of less than 10 mbar is established over the entire length of the line.
An dem der Evakuierungsstelle gegenüberliegenden Ende des Rohrleitungsabschnitts wird trockene Spülluft eingelässen, wobei in den Einlaß eine überkritische Düse eingeschaltet ist, die den Spülgasstrom auf 50 Nm3/h begrenzt, so daß der Spülgasstrom in seiner Molstromstärke hinter der Saugleistung der Vakuumpumpe zurückbleibt.Dry purge air is let in at the end of the pipeline section opposite the evacuation point, a supercritical nozzle being switched on in the inlet, which limits the purge gas flow to 50 Nm 3 / h, so that the purge gas flow remains behind the suction power of the vacuum pump in terms of its molar flow rate.
Gleichzeitig bleibt die Vakuumpumpe auf der anderen Seite des Rohrleitungsabschnittseingeschaltet. Nachdem an der Evakuierungsstelle Spülluft austritt, wird die Vakuumpumpe abgeschaltet und die Düse aus dem Spüllufteinlaß entfernt, um das weitere Fluten der Rohrleitung bis auf Normaldruck zu beschleunigen. Ein zusätzliches Fluten von der Evakuierungsstelle aus ist dann, nach Entfernung des Wasserdampfs aus der Leitung, unkritisch möglich.At the same time, the vacuum pump on the other side of the pipe section remains switched on. After purging air emerges at the evacuation point, the vacuum pump is switched off and the nozzle is removed from the purging air inlet in order to accelerate the further flooding of the pipeline to normal pressure. Additional flooding from the evacuation point is then uncritically possible after the water vapor has been removed from the line.
Ein Rohrleitungsabschnitt wie in Beispiel I wird nach der Druckwasserprüfung entleert und evakuiert, wie zuvor beschrieben.A pipe section as in Example I is emptied and evacuated after the pressure water test, as before wrote.
Das Fluten der Leitung mit getrockneter Spülluft erfolgt in einem mehrstufigen Arbeitsgang, der zuvor urter Berücksichtigung des Strömungswiderstandes der-Leitung, der Saugleistung der Vakuumpumpe und der Strömungseigenschaften der eingeschlossenen Gase an einem Digitalrechner nach der Methode der finiten Elemente simuliert bzw. berechnet wurde, um sicherzustellen, daß bei einer stufenweisen Freigabe der Spülluftzufuhr auch im Endteil des abgesaugten Wasserdampfvolumens, direkt vor der nachlaufenden Spülluftsäule, keine über den Sättigungsdruck hinausgehende Druckerhöhung und damit Rekondensation erfolgt.The flooding of the line with dried purge air takes place in a multi-stage process, which was simulated or calculated beforehand taking into account the flow resistance of the line, the suction power of the vacuum pump and the flow properties of the enclosed gases on a digital computer using the finite element method to ensure that with a gradual release of the purge air supply even in the end part of the extracted water vapor volume, directly in front of the trailing purge air column, there is no pressure increase beyond the saturation pressure and thus recondensation.
Unter Berücksichtigung dieser Simulation erfolgt zunächst eine Spüllufteingabe durch eine überkritische Düse wie im Beispiel I. Nach einem vorgegebenen Zeitabstand wird ein Bypass mit einer zweiten, gleichen überkritischen Düse geöffnet. Nach weiteren vorgegebenen Zeitabständen wird ein dritter und ein vierter Bypass entsprechender Art geöffnet. Es versteht sich, daß auch eine einzige Düse mit mehreren, einer überkritischen Düse entsprechenden öffnungen verwandt werden kann, die nacheinander freigegeben werden.Taking this simulation into account, a purge air is first entered through a supercritical nozzle as in Example I. After a predetermined time interval, a bypass with a second, same supercritical nozzle is opened. After further predetermined time intervals, a third and a fourth bypass of the appropriate type are opened. It goes without saying that a single nozzle with a plurality of openings corresponding to a supercritical nozzle can also be used, which are opened one after the other.
Damit wird die Eingabe des Spülgases forciert bzw. trotz des sich im Rohrleitungsabschnitt am Eingabeende aufbauenden Drucks beibehalten. Nach etwa 10 Stunden ist der Wasserdampf aus dem Rohrleitungsabschnitt abgesaugt, ohne daß irgendwo, insbesondere im Grenzbereich zum Spülgas, eine Rückkondensation eingetreten wäre. Die Leitung wird dann noch sicherheitshalber über weitere 14 Stunden mit 100 Nm3/h Spülgas nachgespült.This forces the purging gas to be input or is maintained despite the pressure building up in the pipeline section at the input end. After about 10 hours, the water vapor has been sucked out of the pipeline section without any recondensation having occurred anywhere, in particular in the border area with the purge gas. As a precaution, the line is then rinsed with 100 Nm 3 / h purge gas for a further 14 hours.
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT84106164T ATE22489T1 (en) | 1983-06-07 | 1984-05-30 | PROCESS FOR SECTIONAL DRYING OF TELETUBE LINES. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3320512A DE3320512A1 (en) | 1983-06-07 | 1983-06-07 | METHOD FOR SECTIONING DRYING OF TELESCOPES |
| DE3320512 | 1983-06-07 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0130372A1 true EP0130372A1 (en) | 1985-01-09 |
| EP0130372B1 EP0130372B1 (en) | 1986-09-24 |
Family
ID=6200855
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP84106164A Expired EP0130372B1 (en) | 1983-06-07 | 1984-05-30 | Method for the sectional drying of pipelines |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US4538359A (en) |
| EP (1) | EP0130372B1 (en) |
| AT (1) | ATE22489T1 (en) |
| AU (1) | AU560393B2 (en) |
| CA (1) | CA1252287A (en) |
| DE (2) | DE3320512A1 (en) |
| NO (1) | NO157992C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SG85708A1 (en) * | 1999-06-08 | 2002-01-15 | Air Liquide | Method and device for filling a distribition line with corrosive gas |
| WO2015199576A1 (en) * | 2014-06-27 | 2015-12-30 | Публичное акционерное общество "Газпром" | Method of pipeline interior drying |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7160574B1 (en) * | 2002-08-28 | 2007-01-09 | Pipe Restoration Technologies, Llc | Barrier coating corrosion control methods and systems for interior piping systems |
| US9061328B2 (en) | 2012-08-03 | 2015-06-23 | William R. Detyens, JR. | Method for cleaning the interior surface of hollow articles |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2426207A1 (en) * | 1978-05-19 | 1979-12-14 | Beau Jean Louis | Removal of moisture from gas pipelines before use - by reducing pressure sufficiently to cause condensation of water |
| FR2444882A1 (en) * | 1978-12-18 | 1980-07-18 | Pipeline Service Sa | METHOD FOR DRYING AND GASTING VACUUM OF PIPES |
| FR2513737A1 (en) * | 1981-09-29 | 1983-04-01 | Pipeline Service Sa | METHOD OF DRYING AND GAS PURIFICATION |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3213479A (en) * | 1962-11-20 | 1965-10-26 | Hupp Corp | Tube drying apparatus |
| GB2091838B (en) * | 1981-01-26 | 1985-04-11 | British Gas Corp | Pipeline cleaning equipment |
-
1983
- 1983-06-07 DE DE3320512A patent/DE3320512A1/en not_active Withdrawn
-
1984
- 1984-05-29 CA CA000455328A patent/CA1252287A/en not_active Expired
- 1984-05-30 AT AT84106164T patent/ATE22489T1/en active
- 1984-05-30 DE DE8484106164T patent/DE3460811D1/en not_active Expired
- 1984-05-30 EP EP84106164A patent/EP0130372B1/en not_active Expired
- 1984-05-31 AU AU28879/84A patent/AU560393B2/en not_active Ceased
- 1984-06-06 NO NO842284A patent/NO157992C/en unknown
- 1984-06-07 US US06/618,098 patent/US4538359A/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2426207A1 (en) * | 1978-05-19 | 1979-12-14 | Beau Jean Louis | Removal of moisture from gas pipelines before use - by reducing pressure sufficiently to cause condensation of water |
| FR2444882A1 (en) * | 1978-12-18 | 1980-07-18 | Pipeline Service Sa | METHOD FOR DRYING AND GASTING VACUUM OF PIPES |
| FR2513737A1 (en) * | 1981-09-29 | 1983-04-01 | Pipeline Service Sa | METHOD OF DRYING AND GAS PURIFICATION |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SG85708A1 (en) * | 1999-06-08 | 2002-01-15 | Air Liquide | Method and device for filling a distribition line with corrosive gas |
| WO2015199576A1 (en) * | 2014-06-27 | 2015-12-30 | Публичное акционерное общество "Газпром" | Method of pipeline interior drying |
| US9939114B2 (en) | 2014-06-27 | 2018-04-10 | Publichnoe Aktsionernoe Obschestvo “Gazprom” | Method of pipeline interior drying |
| AU2014398681B2 (en) * | 2014-06-27 | 2018-10-04 | Publichnoe Aktsionernoe Obschestvo "Gazprom" | Method of pipeline interior drying |
| DE112014006763B4 (en) | 2014-06-27 | 2021-11-11 | Publichnoe Aktsionernoe Obschestvo "Gazprom" | Method of drying the cavity of a pipeline |
Also Published As
| Publication number | Publication date |
|---|---|
| NO842284L (en) | 1984-12-10 |
| DE3320512A1 (en) | 1984-12-13 |
| AU2887984A (en) | 1984-12-13 |
| EP0130372B1 (en) | 1986-09-24 |
| CA1252287A (en) | 1989-04-11 |
| DE3460811D1 (en) | 1986-10-30 |
| US4538359A (en) | 1985-09-03 |
| ATE22489T1 (en) | 1986-10-15 |
| NO157992C (en) | 1988-06-22 |
| NO157992B (en) | 1988-03-14 |
| AU560393B2 (en) | 1987-04-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1735579A1 (en) | Method for cleaning the pipes of a heat exchanger by means of an abrasive, and corresponding device | |
| DE102009034872A1 (en) | Device for plasma-assisted coating of the inside of tubular components by means of a high-frequency magnetic field | |
| WO2014202058A1 (en) | Device and method for producing vacuum tubes | |
| WO2008067870A2 (en) | Insulation device comprising an evacuable heat insulation layer arrangement | |
| EP0130372A1 (en) | Method for the sectional drying of pipelines | |
| DE102005024180B4 (en) | Transfer chamber and vacuum coating system | |
| DE2743525A1 (en) | METHOD FOR IMPREGATING AT LEAST ONE WOODEN PART OF A STRUCTURE OR COMPONENT WITH A WOOD PRESERVATIVE | |
| DE102004029637A1 (en) | Leak detector with sniffer probe | |
| DE1778248A1 (en) | Method and device for wrapping elongated objects with a hose made of stretchable material | |
| DE3428720A1 (en) | METHOD AND SYSTEM FOR CLEANING AND / OR DRYING THE INTERNAL WALL OF TELESCOPES | |
| DE3875932T2 (en) | METHOD AND DEVICE FOR DETECTING AND ELIMINATING GAS BUBBLES INCLUDED IN A THICK FILM COATING. | |
| DD290040A5 (en) | METHOD AND DEVICE FOR RESTORING UNSUITABLE CHANNEL PIPES | |
| DE3426641A1 (en) | Method of re-evacuating vacuum-insulated concentric pipelines | |
| DE102019130303A1 (en) | Device and method for plasma treatment of containers | |
| DE19735351C2 (en) | Ventilation device for vacuum chambers | |
| DE102009058910A1 (en) | Process for the fluorination of components consisting in particular of elastomers and thermoplastics | |
| AT221296B (en) | Process for the operation of ultra-high vacuum pumping systems | |
| DD257112A1 (en) | PROCESS FOR ELIMINATING DISPOSAL IN HOLLOW CABLES | |
| DE3535151A1 (en) | METHOD AND DEVICE FOR PRODUCING A TEMPERATURE-INSULATED PIPE | |
| DE102007057193A1 (en) | Tubular hollow body for the transfer of a gaseous medium and device for sucking and compressing a gaseous medium and fuel cell system | |
| DE19804651A1 (en) | Method for producing a non-positive connection between a casing and the casing of a gun | |
| DD118144B1 (en) | METHOD AND DEVICE FOR FAST EVACUATION OF SMALL BOXES | |
| DE2122826A1 (en) | Method and device for enveloping elongated bodies by means of an extruded, tubular casing | |
| DE19638709A1 (en) | Process and device for cleaning technical components | |
| EP1863948B1 (en) | Device and method for the transport of a tube from a first chamber into a second chamber |
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 |
|
| AK | Designated contracting states |
Designated state(s): AT BE CH DE FR GB IT LI LU NL SE |
|
| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: KOPP AG INTERNATIONAL PIPELINE SERVICES |
|
| 17P | Request for examination filed |
Effective date: 19850629 |
|
| GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
| AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT BE CH DE FR GB IT LI LU NL SE |
|
| REF | Corresponds to: |
Ref document number: 22489 Country of ref document: AT Date of ref document: 19861015 Kind code of ref document: T |
|
| ITF | It: translation for a ep patent filed | ||
| REF | Corresponds to: |
Ref document number: 3460811 Country of ref document: DE Date of ref document: 19861030 |
|
| ET | Fr: translation filed | ||
| PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
| 26N | No opposition filed | ||
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: AT Effective date: 19890530 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LI Effective date: 19890531 Ref country code: CH Effective date: 19890531 |
|
| REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
| ITTA | It: last paid annual fee | ||
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: BE Payment date: 19930414 Year of fee payment: 10 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: LU Payment date: 19930510 Year of fee payment: 10 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 19930526 Year of fee payment: 10 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: NL Payment date: 19930531 Year of fee payment: 10 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 19930602 Year of fee payment: 10 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 19930615 Year of fee payment: 10 |
|
| EPTA | Lu: last paid annual fee | ||
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: SE Payment date: 19940518 Year of fee payment: 11 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19940530 Ref country code: GB Effective date: 19940530 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Effective date: 19940531 Ref country code: BE Effective date: 19940531 |
|
| BERE | Be: lapsed |
Owner name: KOPP A.G. INTERNATIONAL PIPELINE SERVICES Effective date: 19940531 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Effective date: 19941201 |
|
| NLV4 | Nl: lapsed or anulled due to non-payment of the annual fee | ||
| GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 19940530 |
|
| EUG | Se: european patent has lapsed |
Ref document number: 84106164.1 Effective date: 19941210 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Effective date: 19950131 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Effective date: 19950201 |
|
| EUG | Se: european patent has lapsed |
Ref document number: 84106164.1 |
|
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |