EP0130372B1 - Procédé de séchage par tronçons de canalisations - Google Patents

Procédé de séchage par tronçons de canalisations Download PDF

Info

Publication number
EP0130372B1
EP0130372B1 EP84106164A EP84106164A EP0130372B1 EP 0130372 B1 EP0130372 B1 EP 0130372B1 EP 84106164 A EP84106164 A EP 84106164A EP 84106164 A EP84106164 A EP 84106164A EP 0130372 B1 EP0130372 B1 EP 0130372B1
Authority
EP
European Patent Office
Prior art keywords
scavenging gas
section
pipeline
evacuation
drying
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
Application number
EP84106164A
Other languages
German (de)
English (en)
Other versions
EP0130372A1 (fr
Inventor
Harald Dr. Dipl.-Ing. Steinhaus
Detlef Meiners
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KOPP AG INTERNATIONAL PIPELINE SERVICES
Original Assignee
KOPP AG INTERNATIONAL PIPELINE SERVICES
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 KOPP AG INTERNATIONAL PIPELINE SERVICES filed Critical KOPP AG INTERNATIONAL PIPELINE SERVICES
Priority to AT84106164T priority Critical patent/ATE22489T1/de
Publication of EP0130372A1 publication Critical patent/EP0130372A1/fr
Application granted granted Critical
Publication of EP0130372B1 publication Critical patent/EP0130372B1/fr
Expired legal-status Critical Current

Links

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. Such a method is known from FR-A-2 513 737.
  • 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.
  • the practical application of the method usually provides that a closed line section is evacuated with a vacuum pump, with evaporation commencing after a certain negative pressure has been reached, 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, e.g. also dry ambient air, let into the pipeline. If desired, the procedure is repeated.
  • a purge gas e.g. also dry ambient air
  • 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.
  • Such an effect is inevitable if the evacuation and flushing is carried out only from one end of a pipe section, the flushing gas leading to an inclusion of the water vapor even with slow input and keeping the remaining water trapped, 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 flushing gas can be released after an initial throttling, i.e., without throttling 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 along a pipe section in the Evacuation and flooding points be.
  • 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 / 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. for the further the pipeline bre 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 after the pressure water test and , Like previously described. Flooding the line with dried purge air takes place in a multi-stage process Considering the the line, the suction power of the vacuum pump and the flow properties of the enclosed gases were simulated or calculated on a digital computer using the finite element method to ensure that if the purge air supply is gradually released, 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 can also be used with a plurality of openings corresponding to a supercritical nozzle 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)

Claims (8)

1.- Procédé de séchage par tronçons de canalisations destinées au transport de liquides et/ou de gaz, suivant lequel en au moins un point du tronçon de canalisation, une évacuation est effectuée au moyen d'une pompe à vide et le tronçon de canalisation est énsuite purgé ou rempli au moyen de gaz de lavage, caractérisé en ce que lorsqu'une dépression prédéfinie est atteinte, l'aspiration de la pompe à vide étant maintenue, une purge est effectuée à partir de l'extrémité ou des extrémités opposées à l'endroit d'évacuation avec, au moins initialement, un débit molaire du courant de gaz de purge en moyenne à peu près égal ou inférieur à celui du courant d'évacuation.
2.- Procédé suivant la revendication 1, caractérisé en ce que le débit molaire du courant de gaz de purge est maintenu jusqu'au moment où le gaz de purge atteint l'endroit d'évacuation.
3.- Procédé suivant la revendication 1, caractérisé en ce que le gaz de purge pénètre dans le tronçon de canalisation à une vitesse produisant des pertes de charge notables dans la canalisation et le débit molaire du courant de gaz de purge est augmenté avant le moment auquel le gaz de purge atteint l'endroit d'évacuation.
4.- Procédé suivant l'une quelconque des revendications 1 à 3, caractérisé en ce qu'un écurage à l'aide d'air fortement séché au préalable précède l'évacuation.
5.- Procédé suivant l'une quelconque des revendications 1 à 4, caractérisé en ce qu'avant l'évacuation, le tronçon de canalisation est rincé à l'alcool.
6.- Procédé suivant l'une quelconque des revendications 1 a 5, caractérisé en ce que de l'azote est utilisé comme gaz de purge.
7.- Procédé suivant l'une quelconque des revendications 1 à 5, caractérisé en ce qu'un gaz noble ou un mélange de gaz nobles est utilisé comme gaz de purge.
8.- Procédé suivant l'une quelconque des revendications 1 à 5, caractérisé en ce que de l'air ambiant séché est utilisé comme gaz de purge.
EP84106164A 1983-06-07 1984-05-30 Procédé de séchage par tronçons de canalisations Expired EP0130372B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84106164T ATE22489T1 (de) 1983-06-07 1984-05-30 Verfahren zum abschnittsweisen trocknen von fernrohrleitungen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3320512 1983-06-07
DE3320512A DE3320512A1 (de) 1983-06-07 1983-06-07 Verfahren zum abschnittsweisen trocknen von fernrohrleitungen

Publications (2)

Publication Number Publication Date
EP0130372A1 EP0130372A1 (fr) 1985-01-09
EP0130372B1 true EP0130372B1 (fr) 1986-09-24

Family

ID=6200855

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84106164A Expired EP0130372B1 (fr) 1983-06-07 1984-05-30 Procédé de séchage par tronçons de canalisations

Country Status (7)

Country Link
US (1) US4538359A (fr)
EP (1) EP0130372B1 (fr)
AT (1) ATE22489T1 (fr)
AU (1) AU560393B2 (fr)
CA (1) CA1252287A (fr)
DE (2) DE3320512A1 (fr)
NO (1) NO157992C (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2794844B1 (fr) * 1999-06-08 2001-08-03 Air Liquide Procede et dispositif de mise en gaz d'une ligne de distribution de gaz corrosif
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
RU2562873C1 (ru) * 2014-06-27 2015-09-10 Публичное акционерное общество "Газпром" Способ осушки полости трубопроводов

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3213479A (en) * 1962-11-20 1965-10-26 Hupp Corp Tube drying apparatus
FR2426207A1 (fr) * 1978-05-19 1979-12-14 Beau Jean Louis Procede de mise en service d'une canalisation de gaz
FR2444882A1 (fr) * 1978-12-18 1980-07-18 Pipeline Service Sa Procede de sechage et de mise en gaz sous vide de canalisations
GB2091838B (en) * 1981-01-26 1985-04-11 British Gas Corp Pipeline cleaning equipment
FR2513737A1 (fr) * 1981-09-29 1983-04-01 Pipeline Service Sa Procede de sechage et mise en gaz de canalisations

Also Published As

Publication number Publication date
AU2887984A (en) 1984-12-13
ATE22489T1 (de) 1986-10-15
CA1252287A (fr) 1989-04-11
US4538359A (en) 1985-09-03
NO842284L (no) 1984-12-10
DE3320512A1 (de) 1984-12-13
NO157992B (no) 1988-03-14
EP0130372A1 (fr) 1985-01-09
DE3460811D1 (en) 1986-10-30
AU560393B2 (en) 1987-04-02
NO157992C (no) 1988-06-22

Similar Documents

Publication Publication Date Title
DE2950542A1 (de) Vakuumtrockenlegungsverfahren
EP0130372B1 (fr) Procédé de séchage par tronçons de canalisations
DE102014213172A1 (de) Anlage für das Trocknen von Werkstücken
WO2014202058A1 (fr) Dispositif et procédé de fabrication de tubes à vide
DE2743525A1 (de) Verfahren zum impraegnieren von zumindest einem hoelzernen teil eines aufbaus oder bauteils mit einem holz- konservierungsmittel
DE69004638T2 (de) Rohrverbindungsstruktur und eine Rohrverbindungsstruktur aufnehmende Vakuumabwassersammelvorrichtung.
DE2122052A1 (fr)
WO1996003229A1 (fr) Dispositif et agencement pour le sechage de tuyaux dans un systeme de conduites de gaz domestique
DE2350589C2 (de) Verfahren zum Abdichten von verlegten Gasrohrleitungen
DD290040A5 (de) Verfahren und vorrichtung zum sanieren von unbegehbaren kanalrohren
DE1778248A1 (de) Verfahren und Vorrichtung zum Umhuellen von langgestreckten Gegenstaenden mit einem Schlauch aus dehnbarem Material
EP1970467B1 (fr) Chambre de refoulement pour installations de revêtement
DE2800430C2 (de) Verfahren und Vorrichtung zum Imprägnieren eines oder mehrerer Körper aus Holz
DE3428720A1 (de) Verfahren und anlage zum reinigen und/oder trocknen der innenwaende von fernrohrleitungen
DE2934023A1 (de) Nasssandstrahl-verfahren und einrichtung zum durchfuehren des verfahrens
DE19804651A1 (de) Verfahren zur Herstellung einer kraftschlüssigen Verbindung eines Futterrohres mit dem Mantelrohr einer Rohrwaffe
DE4431155C1 (de) Verfahren zur Sanierung von Rohrleitungen, insbesondere Falleitungen
DE10160371B4 (de) Verfahren und Vorrichtung zur Reinigung von Rohrleitungen
DE102005045470A1 (de) Verfahren und Vorrichtung zum Strahlen von Oberflächen
DE492286C (de) Verfahren zur Beregnung oder zum Verteilen von Duenger
AT337283B (de) Verfahren und anlage zum impragnieren der aus mehreren leitern oder adern fertig verseilten seele eines kabels, insbesondere fernsprechkabels
DE3535151A1 (de) Verfahren und einrichtung zur herstellung eines temperaturisolierten leitungsrohres
DE224106C (fr)
DE102006010569A1 (de) Unterdruckabwassereinrichtung
DD207554A5 (de) Verfahren zur reinigung der innenflaeche von in ringform vorliegenden metallrohren

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