EP0131466B1 - Elargissement radial d'éléments de construction tubulaires - Google Patents

Elargissement radial d'éléments de construction tubulaires Download PDF

Info

Publication number
EP0131466B1
EP0131466B1 EP84304696A EP84304696A EP0131466B1 EP 0131466 B1 EP0131466 B1 EP 0131466B1 EP 84304696 A EP84304696 A EP 84304696A EP 84304696 A EP84304696 A EP 84304696A EP 0131466 B1 EP0131466 B1 EP 0131466B1
Authority
EP
European Patent Office
Prior art keywords
tubular member
bladder
contact
tube
post
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
EP84304696A
Other languages
German (de)
English (en)
Other versions
EP0131466A2 (fr
EP0131466A3 (en
Inventor
David E. Merker
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.)
Babcock and Wilcox Co
Original Assignee
Babcock and Wilcox Co
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 Babcock and Wilcox Co filed Critical Babcock and Wilcox Co
Publication of EP0131466A2 publication Critical patent/EP0131466A2/fr
Publication of EP0131466A3 publication Critical patent/EP0131466A3/en
Application granted granted Critical
Publication of EP0131466B1 publication Critical patent/EP0131466B1/fr
Expired legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
    • B21D26/06—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure by shock waves
    • B21D26/08—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure by shock waves generated by explosives, e.g. chemical explosives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/08—Tube expanders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/04—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes with tubes; of tubes with rods
    • B21D39/042—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes with tubes; of tubes with rods using explosives

Definitions

  • the present invention relates to apparatus for and methods of radially expanding tubular members into contact with tubes of nuclear vapour generators.
  • U.S. Patent No. US-A-4195 390 discloses apparatus for radially expanding a tubular member, concentrically located within a tube of a nuclear vapour generator and having an annular space therebetween, into contact with the tube, the apparatus comprising a first end cap, a second end cap spaced from the first end cap, a post rigidly connected between the end caps for connecting the end caps to each other, and an expandable bladder connected between the end caps and extending around the post, the bladder being of a flexible and resilient material and being capable of being radially expanded so as to expand the tubular member to effect contact between the tubular member and the tube and thereafter of contracting out of contact with the tubular member.
  • Hydraulic pressure is internally supplied to the bladder to expand the bladder and the tubular member.
  • hydraulic expansion is much too slow, particularly in a nuclear radiation environment.
  • external pressure sources are required, which adds to the time necessaryy in operating the apparatus disclosed in US-A-4 195 390.
  • U.S. Patent No. US-A-3 287 947 discloses a tube flaring technique utilising an explosive charge to outwardly flare the end of a tube.
  • U.S. Patent No. US-A-3 876 233 discloses an automatic pipe coupling device which uses a propellant for effecting a wedging action to move two parts with respect to each other.
  • apparatus for radially expanding a tubular member, concentrically located within a tube of a nuclear vapour generator and having an annular space therebetween, into contact with the tube, the apparatus comprising a first end cap, a second end cap spaced from the first end cap, a post rigidly connected between the end caps for connecting the end caps to each other, and an expandable bladder connected between the end caps and extending around the post, the bladder being of a flexible and resilient material and being capable of being radially expanded so as to expand the tubular member to effect contact between the tubular member and the tube and thereafter of contracting out of contact with the tubular member, wherein the bladder defines a closed space with the post, a propellant is contained within the closed space, ignition means is associated with the propellant for igniting the propellant so as explosively to generate gas within the closed space so as radially to rapidly expand the bladder so that the bladder comes into contact with the tubular member to expand the tubular member to effect contact between the tubular member and the tube, and means is provided
  • the invention also provides a method of radially expanding a tubular member into contact with the tube of a nuclear vapour generator, the method comprising locating the tubular member concentrically within the tube of the nuclear steam generator while maintaining an annular space therebetween, positioning in the tubular member an apparatus having spaced end caps fixed to each other by a post with an expandable bladder connected between the caps and around the post, the bladder being of a flexible and resilient material, and expanding the bladder so as thereby to expand the tubular member to effect contact between the tubular member and the tube, the bladder thereafter contracting out of contact with the tubular member, wherein the bladder defines a closed space with the post, a fast burning propellant, which upon ignition generates large quantities of gas, is provided in the closed space, the propellant is ignited to rapidly expand the bladder so that the bladder comes into contact with the tubular member to expand at least a portion of the tubular member into contact with the tube for subsequent brazing, and the generated gas is vented to permit contraction of the bladder out of contact with the tubular member.
  • the apparatus is preferably so designed that all of the set up work is done outside of the immediate repair area. This is particularly useful for nuclear radiation environments where exposure should be reduced to a minimum.
  • the propellant is ignited to radially expand the tubular member.
  • the propellant-actuated device can thus be utilized to expand repair tubing within a vapour generator tube of a nuclear-fuelled vapour generator.
  • a preferred apparatus and method embodying the invention and described hereinbelow are simple in design, rugged in construction, economical to manufacture and easy to implement.
  • the drawing shows apparatus 10 for radially expanding a tubular member 12 which, for example, may be repair tubing for a vapour generator tube 14 of a nuclear vapour generator (not shown).
  • the apparatus 10 comprises a first end cap 16, a second end cap 18 and a central post or tie rod 20 rigidly connected to both caps and holding them in a spaced relationship.
  • first end cap 16 would form a lower end cap and the second end cap 18 would form an upper end cap.
  • a flexible, resilient bladder 22 is fixedly connected between the caps 16 and 18 and extends around the post 20 to form a space 24, which is preferably annular.
  • a propellant is provided in the space 24 to partially or fully fill the space.
  • a positioning rod 30 may be fixed to the cap 16, for example by press fitting or by threading an end of the rod 30 into the bore 28. This facilitates the positioning of the apparatus 10 in the tubular member 12 at a desired position.
  • Ignition means is provided in the form of an electrical wire 32 and an ignitor 34.
  • the wire 32 may be supplied through a central bore of the rod 30, the bore 28 and the port 26.
  • Alternative known ignition means may also be provided, which may or may not require mechanical access to the space 24 through the port 26.
  • the end of the post 20 containing the port 26 is threaded into the bore 28 and the opposite end is threaded into a blind bore 36 of the cap 18.
  • the post 20 may include a flange 38 or may be surrounded by a separate ring 40 which bears against the inner surface of the bladder 22 adjacent its ends.
  • the caps 16 and 18 are provided with sleeve extensions 42 and 44, respectively, to support the outer end surfaces of the bladder 22.
  • the apparatus In operation, the apparatus is positioned as shown in Figure 1.
  • the gases may be vented, for example through the ignition port 26.
  • the bladder 22 collapses, as shown in Figure 3, and the apparatus 10 can then be removed.
  • the tubular member 12 is thus expanded in the vapour generator tube 14, in a rapid and secure manner, and with a minimum of on site exposure to nuclear radiation.
  • the present apparatus and method can expand a tubular member within 10 to 15 milliseconds, as opposed to a period of about 5 minutes as required by the hydraulic technique. This is particularly significant where a large number of vapour generator tubes must be repaired in an environment exposed to nuclear radiation.
  • Another advantage of the present method and apparatus is cleanliness. While this is not generally a problem for the hydraulic expansion technique, it can be a problem in other expansion techniques which require lubricants or produce undesirable or harmful waste products.
  • the propellant used with the present method and apparatus is totally contained within the bladder 22 and the generated gases can be vented to a location outside of the expansion area. Thus, there is no tube contamination, which would pose problems to subsequent brazing and could leave undesirable products within the tube or on the tube surface, possibly leading to future tube degradation.
  • a further advantage of the present method and apparatus over the prior art is that it requires far fewer auxiliaries.
  • a power supply need only be connected to the ignition wires.
  • the present method and apparatus do not require pumps, water supplies, piping, pressure recorders or electronic controls.
  • the present method and apparatus do not produce a damaged layer of material on the tube surface, thereby eliminating future corrosion problems which can result from such damage.
  • Exemplary materials for the bladder consist of polyurethane or similar substances having the requisite resiliency.
  • Exemplary materials for the propellant charge are smokeless gunpowders having the requisite burning rate.
  • Smokeless gunpowders usable in the present method and apparatus include the materials sold under the trademarks HI-SKOR and designated as 700-X by E. I. DuPont de Nemours & Co., Inc., and HERCULES 2400 by Hercules Incorporated.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Pipe Accessories (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
  • Air Bags (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Manipulator (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Monitoring And Testing Of Nuclear Reactors (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Claims (7)

1. Appareil pour élargir radialement un élément tubulaire (12) placé concentriquement à l'intérieur d'un tube (14) de générateur de vapeur nucléaire et séparé de lui par un espace annulaire, afin de l'appliquer contre le tube (14), l'appareil (10) comprenant un premier chapeau d'extrémité (16), un second chapeau d'extrémité (18) espacé du premier (16), un potelet (20) monté rigidement entre les chapeaux d'extrémité (16, 18) pour les relier l'un à l'autre, et une vessie dilatable (22) montée entre les chapeaux d'extrémité (16, 18) et s'étendant autour du potelet (20), la vessie (22) étant en un matériau souple et élastique et étant apte à être dilatée radialement de façon à élargir l'élément tubulaire (12) pour établir un contact entre l'élément tubulaire (12) et le tube (14) et à se contracter ensuite pour perdre contact avec l'élément tubulaire (12), caractérisé en ce que la vessie (22) définit avec le potelet (20) un espace clos (24), un agent propulseur est contenu dans l'espace clos (24), un moyen d'allumage (32, 34) est associé au gaz propulseur pour l'enflammer afin d'engendrer de manière explosive du gaz à l'intérieur de l'espace clos (24) afin de provoquer rapidement l'expansion radiale de la vessie (22) de façon que la vessie entre en contact avec l'élément tubulaire (12) pour l'élargir afin d'établir un contact entre lui et le tube (14), et un moyen (26) est prévu pour mettre à l'évent le gaz engendré par explosion afin de permettre à la vessie (22) de perdre contact en se contractant avec l'élément tubulaire (12).
2. Appareil selon la revendication 1, dans lequel la vessie (22) est en polyuréthanne.
3. Appareil selon la revendication 1 ou la revendication 2, dans lequel le potelet (20) présente des rebords (38, 40) disposés dans l'espace (24) près des chapeaux d'extrémité (16, 18), les chapeaux (16, 18) présentent des parties formant manchon (42, 44) entourant les rebords (38, 40), et les parties d'extrémité de la vessie (22) sont fixées entre les manchons et les rebords.
4. Appareil selon la revendication 1, la revendication 2 ou la revendication 3, dans lequel le premier chapeau (16) présente un alésage (28) le traversant, le potelet (20) étant fixé dans l'alésage (28) et présentant un orifice d'allumage (26) reliant l'alésage (28) à l'espace (24).
5. Appareil selon la revendication 1, la revendication 2 ou la revendication 3, dans lequel une tige de positionnement (30) est engagée de manière fixe dans le premier chapeau (16), la tige (30) présente un alésage longitudinal, le moyen d'allumage comprend deux fils (32) s'étendant à travers l'alésage longitudinal, le potelet (20) présente un orifice d'allumage (26) reliant un alésage (28) du premier chapeau (16) à l'espace (24), les deux fils (32) se prolongent à travers l'orifice d'inflammation (26) jusqu'à l'espace (24), et le moyen d'inflammation comprend encore un allumeur (34) relié aux fils (32).
6. Appareil selon l'une quelconque des revendications précédentes, dans lequel l'agent propulseur est une poudre à canon sans fumée.
7. Procédé pour amener par élargissement radial un élément tubulaire (12) en contact avec un tube (14) de générateur de vapeur nucléaire, le procédé comprenant la mise en place de l'élément tubulaire (12) concentriquement à l'intérieur du tube (14) de générateur de vapeur nucléaire avec maintien d'un espace annulaire' intermédiaire, la disposition dans l'élément tubulaire (12) d'un appareil (10) comportant des chapeaux d'extrémité espacés (16, 18) fixés l'un à l'autre par un potelet (20) avec montage d'une vessie dilatable (22) entre les chapeaux et autour du potelet, la vessie (22) étant en un matériau souple et élastique, et le gonflage de la vessie pour élargir par là l'élément tubulaire (12) pour établir un contact entre l'élément tubulaire (12) et le tube (14), la vessie se contractant ensuite pour perdre contact avec l'élément tubulaire (12), caractérisé en ce que la vessie (22) définit un espace clos (24) dans le potelet (20), on prévoit un agent propulseur à combustion rapide, de nature à engendrer en s'enflammant de grandes quantités de gaz, dans l'espace clos (24), on enflamme le gaz propulseur pour gonfler rapidement la vessie (22) de façon qu'elle entre en contact avec l'élément tubulaire (12) pour amener par élargissement une partie au moins de l'élément tubulaire (12) en contact avec le tube (14) aux fins de brasage ultérieur, et l'on met le gaz engendré à l'évent pour permettre à la vessie (22) de perdre contact en se contractant avec l'élément tubulaire (12).
EP84304696A 1983-07-11 1984-07-10 Elargissement radial d'éléments de construction tubulaires Expired EP0131466B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US51227683A 1983-07-11 1983-07-11
US512276 1983-07-11

Publications (3)

Publication Number Publication Date
EP0131466A2 EP0131466A2 (fr) 1985-01-16
EP0131466A3 EP0131466A3 (en) 1985-07-31
EP0131466B1 true EP0131466B1 (fr) 1988-06-08

Family

ID=24038426

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84304696A Expired EP0131466B1 (fr) 1983-07-11 1984-07-10 Elargissement radial d'éléments de construction tubulaires

Country Status (6)

Country Link
EP (1) EP0131466B1 (fr)
JP (1) JPS6086397A (fr)
KR (1) KR910007127B1 (fr)
CA (1) CA1224394A (fr)
DE (1) DE3471893D1 (fr)
ES (1) ES8703991A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09186220A (ja) * 1995-11-27 1997-07-15 Tokyo Electron Ltd 搬送装置及び搬送方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3287947A (en) * 1964-01-03 1966-11-29 Charles E Frantz Explosion apparatus for flanging a tube
BE756406A (fr) * 1969-09-23 1971-03-22 Sulzer Ag Procede de fixation d'un tube dans une plaque perforee par ondes de pression produites par explosion et disposition pour la miseen oeuvre de ce procede
US3751954A (en) * 1971-06-01 1973-08-14 Denver Research Ins Method and apparatus for explosive autofrettage
US3876233A (en) * 1973-05-31 1975-04-08 Amp Inc Toolless automatic pipe-coupling device
US4028789A (en) * 1976-03-29 1977-06-14 Westinghouse Electric Corporation Method of installing a sleeve in one end of a tube
US4195390A (en) * 1977-01-03 1980-04-01 Scientific Technologies, Inc. Apparatus and method for manipulation and sleeving of tubular members
GB2100386B (en) * 1981-04-27 1985-02-06 Foster Wheeler Power Prod Plugging tubes

Also Published As

Publication number Publication date
JPH026440B2 (fr) 1990-02-09
ES8703991A1 (es) 1987-03-01
EP0131466A2 (fr) 1985-01-16
CA1224394A (fr) 1987-07-21
KR850001391A (ko) 1985-03-18
KR910007127B1 (ko) 1991-09-18
DE3471893D1 (en) 1988-07-14
EP0131466A3 (en) 1985-07-31
ES534166A0 (es) 1987-03-01
JPS6086397A (ja) 1985-05-15

Similar Documents

Publication Publication Date Title
US4779445A (en) Sleeve to tube expander device
EP0047407A1 (fr) Procédé de revêtement
US4672832A (en) Method and apparatus for tube expansion
EP0112612B1 (fr) Réparer des tubes dégradés de générateurs de vapeur
US3724062A (en) Explosively welded plug for leaky tubes of a heat exchanger and method of using the same
US7128162B2 (en) Method and apparatus for positioning a sleeve down hole in a hydrocarbon producing well and pipelines
US4694549A (en) Method for remotely replacing tube ends in a heat exchanger
GB2133863A (en) Apparatus for forming an explosively expanded tube-tube sheet joint
US5479961A (en) Method of plugging a heat exchanger tube and plug therefor
EP0131466B1 (fr) Elargissement radial d'éléments de construction tubulaires
US4555053A (en) Method of joining together two pipe ends to form a pipe of metal
AU620814B2 (en) Method of apparatus for expanding and sealing a sleeve into a surrounding tube
US4513903A (en) Method of repairing leaks in steam generator tubes
US5022148A (en) Method for explosively welding a sleeve into a heat exchanger tube
US5038994A (en) Apparatus for explosively welding a sleeve into a heat exchanger tube
US4685205A (en) Apparatus for forming an explosively expanded tube-tube sheet joint including a barrier tube
US4347790A (en) Explosive plug for blocking tubes
CA1214033A (fr) Obturation des fuites aux tubulures de generateurs de vapeur
EP0119997B1 (fr) Dispositif de soudure explosive
EP0381880B1 (fr) Soudage par explosion des manchons sur les surfaces intérieures des tubes
WO1992000591A1 (fr) Procede d'obturation d'une fuite provenant du tube d'extremite du mecanisme de barre de commande dans un reacteur nucleaire
CA1320821C (fr) Methode et appareil de soudage par explosifs d'un manchon sur un tube d'echangeur de chaleur
KR100435136B1 (ko) 핵열교환기의부속품인열전달관을슬리브연결하는방법
US4488346A (en) Apparatus for joining pipe
GB2126674A (en) Tube in shell heat exchangers

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): BE CH DE FR GB IT LI NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Designated state(s): BE CH DE FR GB IT LI NL SE

17P Request for examination filed

Effective date: 19860108

17Q First examination report despatched

Effective date: 19860730

D17Q First examination report despatched (deleted)
ITF It: translation for a ep patent filed

Owner name: ST. ASSOC. MARIETTI & PIPPARELLI

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): BE CH DE FR GB IT LI NL SE

REF Corresponds to:

Ref document number: 3471893

Country of ref document: DE

Date of ref document: 19880714

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
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19900625

Year of fee payment: 7

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: NL

Payment date: 19900731

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19910628

Year of fee payment: 8

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19910710

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19910726

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19910923

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19911106

Year of fee payment: 8

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19920201

GBPC Gb: european patent ceased through non-payment of renewal fee
NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19920711

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19920731

Ref country code: CH

Effective date: 19920731

Ref country code: BE

Effective date: 19920731

BERE Be: lapsed

Owner name: THE BABCOCK & WILCOX CY

Effective date: 19920731

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19930401

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19940613

Year of fee payment: 11

EUG Se: european patent has lapsed

Ref document number: 84304696.2

Effective date: 19930204

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19960430

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST