FR2712065A1 - Method and device for transporting liquid hydrocarbons including the production of a double-walled pipeline with a remote sealing-detection device - Google Patents

Method and device for transporting liquid hydrocarbons including the production of a double-walled pipeline with a remote sealing-detection device Download PDF

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Publication number
FR2712065A1
FR2712065A1 FR9313303A FR9313303A FR2712065A1 FR 2712065 A1 FR2712065 A1 FR 2712065A1 FR 9313303 A FR9313303 A FR 9313303A FR 9313303 A FR9313303 A FR 9313303A FR 2712065 A1 FR2712065 A1 FR 2712065A1
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Prior art keywords
tube
piping
pressure
double
neutral liquid
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FR9313303A
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French (fr)
Inventor
Gentilhomme Pascal
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LEFEBVRE GENTILHOMME SA
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LEFEBVRE GENTILHOMME SA
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Priority to FR9313303A priority Critical patent/FR2712065A1/en
Publication of FR2712065A1 publication Critical patent/FR2712065A1/en
Pending legal-status Critical Current

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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
    • F16L7/00—Supporting of pipes or cables inside other pipes or sleeves, e.g. for enabling pipes or cables to be inserted or withdrawn from under roads or railways without interruption of traffic
    • 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
    • F16L9/00—Rigid pipes
    • F16L9/18—Double-walled pipes; Multi-channel pipes or pipe assemblies
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17D—PIPE-LINE SYSTEMS; PIPE-LINES
    • F17D5/00—Protection or supervision of installations
    • F17D5/02—Preventing, monitoring, or locating loss
    • F17D5/04—Preventing, monitoring, or locating loss by means of a signalling fluid enclosed in a double wall
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
    • G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
    • G01M3/2807—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes
    • G01M3/283—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes for double-walled pipes
    • 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
    • F16L2201/00—Special arrangements for pipe couplings
    • F16L2201/30—Detecting leaks

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Examining Or Testing Airtightness (AREA)

Abstract

Double-walled pipeline for transporting hydrocarbons. The invention relates to a device making it possible to make a double-walled pipeline for transporting liquid hydrocarbons with method and device for detecting defective sealing. It consists of a tube (1) containing the hydrocarbon (15) slipped inside a tube (2) containing a neutral liquid (16). Pressure sensors (18 and 19) connected to the annular section formed between the two tubes (1 and 2) containing the neutral liquid (16) are connected to an alarm system (20). The sensor (18) monitors the sealing of the tube (1) using a rise in pressure, the sensor (19) monitors the sealing of the tube (2) using a drop in pressure. The uniformity of the pressure of the neutral liquid (16) is ensured using an expansion vessel (21). The device according to the invention is particularly designed to prevent pollution of the environment and of the subsoil through the uncontrolled spreading-out of hydrocarbons.

Description

DESCRIPTION
La présente invention concerne essentiellement un procédé et un dispositif de sécurité capable de contenir des fuites éventuelles sur des réseaux d'hydrocarbures liquides afin d'éviter la communication de ceux-ci avec l'environnement: "Sous-sols et Atmosphère".DESCRIPTION
The present invention essentially relates to a method and a safety device capable of containing possible leaks in liquid hydrocarbon networks in order to avoid their communication with the environment: "Basements and Atmosphere".

Traditionnellement, les tuyauteries de transport des hydrocarbures sont réalisées en tube acier normalisé. Le vieillissement de ces tuyauteries (corrosion, élimage, et contrainte) amène des fuites entrainant l'épendage des liquides vers l'environnement.Traditionally, the oil transport pipes are made of standardized steel tube. The aging of these pipes (corrosion, elimination, and stress) leads to leaks causing the spreading of liquids to the environment.

La pollution est non seulement dommageable pour l'environnement de l'homme mais nécessite après contamination de celui-ci, une dépollution mettant en oeuvre des moyens techniques et humains onéreux dus à un travail lent et fastidieux.Pollution is not only damaging to the human environment but requires, after contamination of the latter, pollution control using expensive technical and human means due to slow and tedious work.

Le dispositif selon l'invention permet de remédier à cet inconvénient, il comporte en effet une deuxième tuyauterie enveloppant la tuyauterie principale véhiculant le fluide.The device according to the invention overcomes this drawback, it in fact comprises a second piping enveloping the main piping conveying the fluid.

Ce système permet de contenir les dites fuites dans la section annulaire comprise entre les deux tuyauteries.This system makes it possible to contain said leaks in the annular section between the two pipes.

Un système de contrôle permanent détecte la présence du fluide dans cette section et déclenche des alarmes.A permanent control system detects the presence of the fluid in this section and triggers alarms.

Selon le principe d'une installation classique le fluide pompé provient d'un réservoir ou d'une cuve puis transporté à l'aide du réseau vers les points de puisage. Toujours selon ce principe, on rencontre deux types d'installations : soit enterrées, soit aériennes.According to the principle of a conventional installation, the pumped fluid comes from a reservoir or a tank and then transported using the network to the draw-off points. Still according to this principle, there are two types of installations: either buried or aerial.

Le principe de réalisation du procédé consiste à créer une double enveloppe, le tube interne 1 est enfilé dans le tube externe 2 figure 1. Dans le cas d'une installation enterrée on utilise pour le tube externe 2, un tube acier revêtu d'une couche de protection 3 type "revêtement polyéthylène" figure 2. Dans le cas d'une installation aérienne, on utilise un tube acier classique nu . Dans les deux cas le tube interne 1 est un tube acier classique nu. The principle of realization of the process consists in creating a double envelope, the internal tube 1 is threaded in the external tube 2 figure 1. In the case of a buried installation one uses for the external tube 2, a steel tube coated with a protective layer 3 type "polyethylene coating" figure 2. In the case of an aerial installation, a conventional bare steel tube is used. In both cases the internal tube 1 is a conventional bare steel tube.

La réalisation de la double enveloppe consiste à positionner les deux tubes de façon concentrique l'un par rapport à l'autre, figure 3. Pour ce faire, on interpose des entretoises 4 en acier que l'on soude longitudinalement sur la circonférence du tube interne 1 et ce sur toute la longueur à une distance constante et définie au cas par cas. The realization of the double envelope consists in positioning the two tubes concentrically with respect to each other, Figure 3. To do this, we interpose steel spacers 4 which are welded longitudinally on the circumference of the tube internal 1 and this over the entire length at a constant distance defined on a case-by-case basis.

Les entretoises 4 sont positionnées tous les 120 degrés sur la circonférence du tube 1, figure 4. Lorsque les deux tubes sont enfilés, le soudage des longueurs entre elles est réalisé de deux façons selon figure 5.The spacers 4 are positioned every 120 degrees on the circumference of the tube 1, FIG. 4. When the two tubes are threaded, the welding of the lengths between them is carried out in two ways according to FIG. 5.

Pour le tube intérieur par soudage en rapprochement et en chanfrein oxyacéthylénique ou arc 5.For the inner tube by approximation welding and in oxy-ethylene chamfer or arc 5.

Pour le tube extérieur par interposition de deux demi-coquilles 6 soudées suivant procédé identique tube intérieur sur la circonférence et les deux faces longitudinales 7.For the outer tube by interposition of two half-shells 6 welded according to the identical method inner tube on the circumference and the two longitudinal faces 7.

Pour le cas particulier des dérivations (coudes, tés, piquages, etc ) figures 6 et 7, le mode opératoire consiste à réaliser des demi-coquilles 8 symétriques entourant la pièce de dérivation 9, le soudage étant réalisé sur les circonférences et les faces longitudinales 10.For the specific case of branches (elbows, tees, tappings, etc.) in Figures 6 and 7, the procedure consists in making symmetrical half-shells 8 surrounding the branch piece 9, the welding being carried out on the circumferences and the longitudinal faces 10.

La fin de la tuyauterie est constituée par un filetage 14 sur lequel vient se raccorder le système de distribution d'hydrocarbure (volucompteur, station service, etc ....) etlou des vannes d'isolement figure 8.The end of the piping is constituted by a thread 14 to which the hydrocarbon distribution system is connected (pressure meter, service station, etc.) and / or isolation valves in FIG. 8.

Après constitution d'une tuyauterie complète comprenant le départ sur une cuve ou un réservoir et l'arrivée sur un élément de puisage (volucompteur de station service). La double enveloppe est continue et établie sur toute la longueur du réseau ainsi constitué.After constitution of a complete piping including the departure on a tank or a tank and the arrival on a drawing element (meter counter of service station). The double envelope is continuous and established over the entire length of the network thus formed.

Afin de pouvoir intercaler un système de détection de fuite d'hydrocarbure dans la section annulaire de la double enveloppe, on remplit cette section annulaire d'un liquide neutre (ex : eau + produit stabilisant).In order to be able to insert a hydrocarbon leak detection system in the annular section of the double jacket, this annular section is filled with a neutral liquid (eg water + stabilizing product).

Traditionnellement, la pression du réseau hydrocarbure est de 2,5 bar 15 dans le cas des installations avec pompe immergée dans la cuve ou le réservoir. On maintient une pression dans la section annulaire de 1 bar environ par l'intermédiaire du liquide neutre 16, voir figure 9. Traditionally, the pressure of the hydrocarbon network is 2.5 bar 15 in the case of installations with pump submerged in the tank or the tank. A pressure in the annular section of about 1 bar is maintained by means of the neutral liquid 16, see FIG. 9.

Afin de pouvoir détecter la présence d'hydrocarbure dans le liquide neutre 16, on procède au soudage de deux manchons filetés 17 sur l'extérieur de la tuyauterie, de manière à pouvoir installer des capteurs de pressions 18 et 19.In order to be able to detect the presence of hydrocarbon in the neutral liquid 16, two threaded sleeves 17 are welded to the outside of the piping, so that pressure sensors 18 and 19 can be installed.

On distingue deux seuils d'alarme. En effet, deux risques de fuite sont envisagés; premièrement une fuite de la tuyauterie intérieure d'hydrocarbure 15 vers la section annulaire avec le liquide neutre 16, ce qui entrainera une montée en pression captée par le seuil de niveau haut par l'intermédiaire du capteur 18.There are two alarm thresholds. Indeed, two risks of leakage are envisaged; firstly, a leak in the internal hydrocarbon piping 15 towards the annular section with the neutral liquid 16, which will cause a pressure increase sensed by the high level threshold via the sensor 18.

Deuxièmement, une fuite de la tuyauterie extérieure formant la double enveloppe et contenant le liquide neutre 16 vers l'environnement, ce qui entrainera une baisse de pression captée par le seuil de niveau bas par l'intermédiaire du capteur 19.Secondly, a leak in the external piping forming the double jacket and containing the neutral liquid 16 towards the environment, which will cause a drop in pressure picked up by the low level threshold via the sensor 19.

Grace à ces deux capteurs et à ces deux niveaux d'alarme, on peut transmettre ces informations à une armoire de synthèse 20.Thanks to these two sensors and these two alarm levels, this information can be transmitted to a synthesis cabinet 20.

Un liquide étant par nature incompressible ; il y a risque, en cas d'échauffement de l'environnement de la double enveloppe d'une montée en pression du liquide neutre 16.A liquid being by nature incompressible; there is a risk, in the event of heating of the environment of the double envelope, of a rise in pressure of the neutral liquid 16.

Afin de remédier à ce risque, on procède au soudage d'un manchon fileté 17 sur l'extérieur de la tuyauterie de manière à pouvoir installer un vase d'expansion 21 taré à environ 1 bar.In order to remedy this risk, a threaded sleeve 17 is welded to the outside of the piping so as to be able to install an expansion tank 21 calibrated at approximately 1 bar.

Ce vase d'expansion comprend une réserve d'azote 22 séparée du liquide neutre par une membrane en caoutchouc 23. Dans le cas d'une montée en pression due à un échauffement, la dilatation du liquide appuiera sur la membrane qui comprimera l'azote maintenant ainsi une pression stable du liquide neutre de la double enveloppe.This expansion tank includes a nitrogen reserve 22 separated from the neutral liquid by a rubber membrane 23. In the case of a pressure increase due to heating, the expansion of the liquid will press on the membrane which will compress the nitrogen thus maintaining a stable pressure of the neutral liquid of the jacket.

Toutefois, ce risque de variation de pression est particulièrement faible compte tenu de la petite contenance en eau du système.However, this risk of pressure variation is particularly low given the small water content of the system.

De plus, la majorité des installations est constituée de réseaux enterrés bénéficiant ainsi d'une faible inertie thermique. Le dispositif selon l'invention est particulièrement destiné à empêcher les risques de pollution de l'environnement et des sous-sols par épandage non maitrisé d'hydrocarbures.In addition, the majority of installations are made up of buried networks, thus benefiting from low thermal inertia. The device according to the invention is particularly intended to prevent the risks of pollution of the environment and of subsoils by uncontrolled spreading of hydrocarbons.

Ce système convient parfaitement pour la réalisation de tuyauterie d'hydrocarbures dans des sites tels que : stations service, dépôts pétroliers, raffineries, installations industrielles, etc... This system is perfectly suited for the production of hydrocarbon piping in sites such as: service stations, petroleum depots, refineries, industrial installations, etc.

Claims (8)

Atmosphère), caractérisé par le fait que la tuyauterie traditionnelle (1) est entourée d'une deuxième tuyauterie (2) dite double enveloppe et exerçant une enceinte de protection et de conditionnement des risques.Atmosphere), characterized by the fact that the traditional piping (1) is surrounded by a second piping (2) called a double envelope and carrying out a protection and risk conditioning enclosure. REVENDICATIONS 1) Procédé pour le transport des hydrocarbures liquides sous conditions optimales de sécurité afin d'éviter la pollution des environnements de l'homme (Sous-sols et CLAIMS 1) Process for the transportation of liquid hydrocarbons under optimal safety conditions in order to avoid pollution of human environments (Basements and 2) Dispositif pour véhiculer des hydrocarbures en toute sécurité par une tuyauterie double enveloppe et équipée de système de détection des fuites éventuelles, caractérisé en ce qu'il consiste à créer une double enveloppe, le tube interne (1) est enfilé dans le tube externe (2). Dans le cas d'une installation enterrée, on utilise pour le tube externe (2), un tube acier revêtu d'une couche de protection (3) type "revêtement Polyéthylène". Dans le cas d'une installation aérienne, on utilise un tube acier classique nu. Dans les deux cas, le tube interne (1) est un tube acier nu. Le positionnement des deux tubes, de façon concentrique, se fait par interposition d'entretoises en acier soudé sur la circonférence du tube (1) sur toute la longueur. Les entretoises (4) positionnées tous les 120 degrés.2) Device for conveying hydrocarbons in complete safety by a double envelope piping and equipped with a system for detecting possible leaks, characterized in that it consists in creating a double envelope, the internal tube (1) is threaded into the external tube (2). In the case of a buried installation, a steel tube coated with a protective layer (3) of the "Polyethylene coating" type is used for the external tube (2). In the case of an aerial installation, a conventional bare steel tube is used. In both cases, the internal tube (1) is a bare steel tube. The positioning of the two tubes, concentrically, is done by interposing welded steel spacers on the circumference of the tube (1) over the entire length. The spacers (4) positioned every 120 degrees. 3) Dispositif selon la revendication 2 caractérisé en ce que les deux tubes, une fois enfilés, soient soudés par rapprochement pour le tube intérieur (1) et en l'interposition de deux demi-coquilles (6) soudées suivant procédé identique tube (1) sur la circonférence et les deux faces longitudinales pour le tube extérieur (2).3) Device according to claim 2 characterized in that the two tubes, once threaded, are welded by approximation to the inner tube (1) and by interposing two half-shells (6) welded according to the identical tube process (1 ) on the circumference and the two longitudinal sides for the outer tube (2). 4) Dispositif selon la revendication 3 caractérisé en ce qu'il comporte des dérivations (coudes, tés, piquages, etc...), le mode opératoire consiste à réaliser des demi-coquilles (8) symétriques entourant la pièce de dérivation (9), le soudage étant réalisé sur les circonférences et les faces longitudinales.4) Device according to claim 3 characterized in that it comprises branches (elbows, tees, tapping, etc ...), the procedure consists in making symmetrical half-shells (8) surrounding the branch piece (9 ), the welding being carried out on the circumferences and the longitudinal faces. 5) Dispositif selon l'une quelconque des revendications 2 à 4 caractérisé par le fait que l'on interpose un liquide neutre dans la section annulaire de double enveloppe ainsi constituée. 5) Device according to any one of claims 2 to 4 characterized in that one interposes a neutral liquid in the annular section of double jacket thus formed. 6) Dispositif selon la revendication 5 consistant à souder des manchons filetés (17) sur l'extérieur de la tuyauterie de manière à pouvoir installer des capteurs de pression (18) et (19). Ces deux capteurs par l'intermédiaire du liquide neutre 16) captent les deux seuils de pressions permettant le contrôle de l'étanchéité de la tuyauterie intérieure (1) et de la tuyauterie extérieure (2) donc de la double enveloppe.6) Device according to claim 5 consisting of welding threaded sleeves (17) on the outside of the piping so as to be able to install pressure sensors (18) and (19). These two sensors by means of the neutral liquid 16) capture the two pressure thresholds allowing the tightness of the internal piping (1) and the external piping (2) to be checked, and therefore of the double jacket. 7) Dispositif selon la revendication 6 caractérisé en ce que les capteurs simultanément (18) et (19) captent les niveaux des pressions et enclenchent des seuils d'alarmes indiquant l'état d'étanchéité de l'installation.7) Device according to claim 6 characterized in that the sensors simultaneously (18) and (19) capture the pressure levels and trigger alarm thresholds indicating the state of tightness of the installation. 8) Dispositif selon la revendication 5 caractérisé en ce que la stabilité de la pression du liquide neutre (16) dans la section annulaire est assuré par l'adjonction d'un vase d'expansion (21) permettant de contenir les éventuelles variations de volume du liquide neutre risquant de créer une augmentation de pression dans la section annulaire. 8) Device according to claim 5 characterized in that the stability of the pressure of the neutral liquid (16) in the annular section is ensured by the addition of an expansion tank (21) making it possible to contain any variations in volume neutral liquid which may create an increase in pressure in the annular section.
FR9313303A 1993-11-03 1993-11-03 Method and device for transporting liquid hydrocarbons including the production of a double-walled pipeline with a remote sealing-detection device Pending FR2712065A1 (en)

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Application Number Priority Date Filing Date Title
FR9313303A FR2712065A1 (en) 1993-11-03 1993-11-03 Method and device for transporting liquid hydrocarbons including the production of a double-walled pipeline with a remote sealing-detection device

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FR9313303A FR2712065A1 (en) 1993-11-03 1993-11-03 Method and device for transporting liquid hydrocarbons including the production of a double-walled pipeline with a remote sealing-detection device

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FR2712065A1 true FR2712065A1 (en) 1995-05-12

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999008040A1 (en) * 1997-08-07 1999-02-18 Siemens Aktiengesellschaft Method for protecting built-in components
ES2229838A1 (en) * 2002-02-25 2005-04-16 Jose Luis Casañas Dominguez Plastics lined steel piping for safe transport of contaminating products includes a chamber containing water surrounding the lining and communicating with expansion vessels, for leak detection
WO2008009289A1 (en) * 2006-07-20 2008-01-24 Poul Svendsen A heat exchange module, in particular for a ground source heat pump
CN102102790B (en) * 2009-12-18 2012-08-15 中国石油天然气集团公司 Overground pressure distributor for underground pipeline
CN103148284A (en) * 2013-02-26 2013-06-12 胜利油田胜利勘察设计研究院有限公司 Flange-type gauge valve group
CN103453323A (en) * 2013-08-26 2013-12-18 朱振 Pipe network water leakage active monitoring and positioning system and method of system
CN106051326A (en) * 2016-05-28 2016-10-26 许昌东方热力有限公司 Novel heat supply pipeline
EP3246610A1 (en) * 2016-05-20 2017-11-22 Airbus Operations GmbH Shrouded pipe
AU2013362722B2 (en) * 2012-12-19 2018-06-07 Specialized Desanders Inc. Erosion resistant flow conduit
US11143349B2 (en) 2016-05-20 2021-10-12 Airbus Operations Gmbh Shrouded pipe

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DE853229C (en) * 1942-03-13 1952-10-23 Geraetebau Ag Deutsche Hollow-jacket pipeline made of iron
US2896669A (en) * 1957-01-11 1959-07-28 Jack L Broadway Pipe casement
CH428340A (en) * 1964-03-25 1967-01-15 Wittgenstein Gerard Francis Safety pipeline
CH468590A (en) * 1967-02-07 1969-03-31 Francis Wittgenstein Gerard Installation of protection against leaks of a pipe and method for its construction
DE3213821A1 (en) * 1982-04-15 1983-10-27 kabelmetal electro GmbH, 3000 Hannover Pipeline for transporting media harmful to the environment, and method of producing and laying the same
DE3931058C1 (en) * 1989-09-18 1990-07-26 Jung Ohg, 6232 Bad Soden, De Pipeline laying method - outer pipe casings are welded before inner flow pipes, and latter pushed into already laid pipe casing

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE853229C (en) * 1942-03-13 1952-10-23 Geraetebau Ag Deutsche Hollow-jacket pipeline made of iron
US2896669A (en) * 1957-01-11 1959-07-28 Jack L Broadway Pipe casement
CH428340A (en) * 1964-03-25 1967-01-15 Wittgenstein Gerard Francis Safety pipeline
CH468590A (en) * 1967-02-07 1969-03-31 Francis Wittgenstein Gerard Installation of protection against leaks of a pipe and method for its construction
DE3213821A1 (en) * 1982-04-15 1983-10-27 kabelmetal electro GmbH, 3000 Hannover Pipeline for transporting media harmful to the environment, and method of producing and laying the same
DE3931058C1 (en) * 1989-09-18 1990-07-26 Jung Ohg, 6232 Bad Soden, De Pipeline laying method - outer pipe casings are welded before inner flow pipes, and latter pushed into already laid pipe casing

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999008040A1 (en) * 1997-08-07 1999-02-18 Siemens Aktiengesellschaft Method for protecting built-in components
ES2229838A1 (en) * 2002-02-25 2005-04-16 Jose Luis Casañas Dominguez Plastics lined steel piping for safe transport of contaminating products includes a chamber containing water surrounding the lining and communicating with expansion vessels, for leak detection
WO2008009289A1 (en) * 2006-07-20 2008-01-24 Poul Svendsen A heat exchange module, in particular for a ground source heat pump
CN102102790B (en) * 2009-12-18 2012-08-15 中国石油天然气集团公司 Overground pressure distributor for underground pipeline
AU2013362722B2 (en) * 2012-12-19 2018-06-07 Specialized Desanders Inc. Erosion resistant flow conduit
CN103148284B (en) * 2013-02-26 2014-10-29 胜利油田胜利勘察设计研究院有限公司 Flange-type gauge valve group
CN103148284A (en) * 2013-02-26 2013-06-12 胜利油田胜利勘察设计研究院有限公司 Flange-type gauge valve group
CN103453323A (en) * 2013-08-26 2013-12-18 朱振 Pipe network water leakage active monitoring and positioning system and method of system
CN103453323B (en) * 2013-08-26 2015-06-17 朱振 Pipe network water leakage active monitoring and positioning system and method of system
EP3246610A1 (en) * 2016-05-20 2017-11-22 Airbus Operations GmbH Shrouded pipe
US10520116B2 (en) 2016-05-20 2019-12-31 Airbus Operations Gmbh Shrouded pipe
US11143349B2 (en) 2016-05-20 2021-10-12 Airbus Operations Gmbh Shrouded pipe
CN106051326A (en) * 2016-05-28 2016-10-26 许昌东方热力有限公司 Novel heat supply pipeline
CN106051326B (en) * 2016-05-28 2018-12-28 许昌东方热力有限公司 A kind of new heat-supplying pipeline

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