EP0764596A1 - Äussere Schutzvorrichtung und sekundäres Rückhaltesystem für unterirdischen, metallischen Behälter für flüssige Kohlenwasserstoffe und strukturelles Element dafür - Google Patents

Äussere Schutzvorrichtung und sekundäres Rückhaltesystem für unterirdischen, metallischen Behälter für flüssige Kohlenwasserstoffe und strukturelles Element dafür Download PDF

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Publication number
EP0764596A1
EP0764596A1 EP95830383A EP95830383A EP0764596A1 EP 0764596 A1 EP0764596 A1 EP 0764596A1 EP 95830383 A EP95830383 A EP 95830383A EP 95830383 A EP95830383 A EP 95830383A EP 0764596 A1 EP0764596 A1 EP 0764596A1
Authority
EP
European Patent Office
Prior art keywords
shells
tank
hatch
cylindrical
collars
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
Application number
EP95830383A
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English (en)
French (fr)
Other versions
EP0764596B1 (de
Inventor
Giovanni Poillucci
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.)
Walter Tosto Serbatoi SpA
Original Assignee
Walter Tosto Serbatoi SpA
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
Priority to AT95830383T priority Critical patent/ATE179382T1/de
Priority to SI9530236T priority patent/SI0764596T1/xx
Priority to DE69509384T priority patent/DE69509384T2/de
Priority to ES95830383T priority patent/ES2132587T3/es
Priority to EP95830383A priority patent/EP0764596B1/de
Application filed by Walter Tosto Serbatoi SpA filed Critical Walter Tosto Serbatoi SpA
Priority to DK95830383T priority patent/DK0764596T3/da
Publication of EP0764596A1 publication Critical patent/EP0764596A1/de
Application granted granted Critical
Publication of EP0764596B1 publication Critical patent/EP0764596B1/de
Priority to GR990401534T priority patent/GR3030461T3/el
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D88/00—Large containers
    • B65D88/76—Large containers for use underground
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D90/00—Component parts, details or accessories for large containers
    • B65D90/48—Arrangements of indicating or measuring devices
    • B65D90/50—Arrangements of indicating or measuring devices of leakage-indicating devices
    • B65D90/501—Arrangements of indicating or measuring devices of leakage-indicating devices comprising hollow spaces within walls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D90/00—Component parts, details or accessories for large containers
    • B65D90/48—Arrangements of indicating or measuring devices
    • B65D90/50—Arrangements of indicating or measuring devices of leakage-indicating devices
    • B65D90/501—Arrangements of indicating or measuring devices of leakage-indicating devices comprising hollow spaces within walls
    • B65D90/503—Arrangements of indicating or measuring devices of leakage-indicating devices comprising hollow spaces within walls under pressure or vacuum

Definitions

  • the present invention relates to an outer protection and secondary containment system for an underground metal tank for liquid hydrocarbons such as petrol, gas oil, naphtha and contaminant liquids in general, and to a structural element thereof.
  • liquid hydrocarbons such as petrol, gas oil, naphtha and contaminant liquids in general
  • the pit is covered with a waterproofing concrete layer which forms a secondary containment for the tank with the formation of a space to prevent the tank, which is supported by suitable supports, directly contacting the soil and the walls of the pit and to ensure that any leakages from the tank due to breakage or perforation are contained in the space.
  • the patent US-A-4,672,366 describes an underground tank around which a hermetically sealed plastics container constituted by a cylindrical cover and two end plates heat-sealed onto the cover is formed before installation.
  • a spacer grid forming a suitable space and, locally near a liquid leakage sensor housed in the space, also an absorbent felt which concentrates any leakages close to the sensor.
  • tanks for underground installation have also been proposed, as described in the patents US-A- 4,739,659 and US-A-4,676,093, with double containment walls made entirely of plastics material reinforced with glass fibre, in which an inner cylindrical container has external annular ribs which act as anchoring spacers on which an outer container is formed and fixed.
  • a substantially continuous space is formed between the metal tank and the plastics container and is interrupted only at the localized bearing points constituted by the projections.
  • the space is constituted by a plurality of annular cavities each disposed between the metal tank and one of the ribs and communicating with one another by means of annular contact regions between the metal tank and the outer plastics container, which regions are not impervious.
  • intercommunication between the annular cavities is facilitated by grooves which interrupt the continuity of the annular contact regions transverse the ribs and inside the plastics container.
  • two half-collars are formed integrally with the two half-shells and are coupled to form a sealing collar for partially housing the hatch.
  • Sealing is advantageously achieved by a sealing ring clamped by a pivoted clamp which can be opened.
  • a metal tank for liquid hydrocarbons, for installation underground is constituted by a cylindrical body 1 of outside diameter D, closed at its ends by two generally hemispherical caps 2, 3, welded to the body 1.
  • the plate 5 has members of known type, not shown, for the admission and extraction of liquid, for level measurements and for keeping the tank at atmospheric pressure.
  • the tank is installed underground in a pit in a horizontal position with the hatch 4 disposed at the top and housed in a shaft 6 formed by a concrete ring 7 disposed above the tank.
  • a secondary container 8 of plastics material preferably high-density polyethylene, is provided and encloses the entire metal tank.
  • the secondary container 8 is formed by two generally cylindrical half-shells 9, 10, each having an end closed by a generally hemispherical cap 11, 12 and an open end having a flat annular flange 13, 14.
  • the cylindrical walls of the two half-shells 9, 10 are corrugated with a plurality of annular corrugations 17, 18 like bellows.
  • corrugations which are distributed over the entire axial lengths of the half-shells 9, 10, form hollow annular ribs which have minimum inside diameters D1 and maximum diameters D2 and which increase the stiffness of the half-shells in a radial direction relative to the axis of the cylinder and confer a certain resilience to the half-shells in an axial direction.
  • the minimum inside diameter D1 of the half-shells at the minimum diameter of the ribs 17, 18 is advantageously equal to or slightly less than the diameter D of the tank 1.
  • the two half-shells 9, 10 can therefore be fitted on the tank 1 by being pulled gradually from the ends of the tank towards its central portion.
  • the minimum diameter D1 of the half-shells is less than the diameter of the tank, the operation is easy because, as is known, if a cylindrical bellows is subjected to tensile stress, the extension of the bellows also involves dimensional changes in a radial direction which decrease its maximum diameter and increase its minimum diameter.
  • the joint is easily sealed by known plastics heat-sealing methods or by bonding with suitable resin.
  • the juxtaposed ends of the two half collars 15, 16 may have flat lips, extensions of the flanges 13, 14, and the joint can be sealed by heat-sealing or bonding.
  • a space of variable thickness constituted by the internal cavities of the various ribs is also formed between the tank 1 and the secondary container.
  • the internal cavities of the various ribs intercommunicate in the region of contact of the ribs with the outer wall of the tank, which region is not impervious.
  • the ribs may be replaced by a plurality of advantageously rounded, crucible-shaped recesses formed in the outer walls of the plastics half-shells and corresponding to projections 45 inside the half-shells.
  • the heights of the projections which are of the order of 50-60 mm, are defined according to the diameter of the tank so that the heads of the projections contact the surface of the tank.
  • the diameters of the projections may be of the order of 50-70 mm with interaxial spacings of the order of 150 mm between the projections which are distributed uniformly over the entire inner surface of the plastics half-shells at the junctions of a theoretical square-mesh network.
  • the presence of the projections ensures a certain radial resilience of the half-shells which enables the half-shells to be fitted easily on the metal tank and, at the same time, provides distributed contact and bearing points between the half-shells add the tank 1.
  • a space is formed between the outer container and the tank.
  • a detector for detecting the presence of liquid may be disposed in the space, in known manner.
  • the pressure in the space may also be kept at a controlled value which may differ from atmospheric pressure, so that variations of pressure in the space provide an indication of any leakages from the space (which reduce the pressure), and of any infiltrations into the space, which increase its pressure.
  • the seal can be achieved by the interposition between the half-collars 15, 16 and the hatch 4 of a band of resilient material or a resilient sealing ring (through which the connections to the liquid and/or pressure detector devices housed in the space can be passed).
  • a suitable compression of the seal can be achieved by making use of the relative resilience of the plastics material, with a pivoted clamp clamping the two half collars.
  • the upper ends of the two half-collars 15, 16 can be expanded radially to form a socket 20 for housing an O-ring 21 of resilient material and the socket 20 can be clamped by a pivoted two-part clamp 22, 23, closed by means of a bolt.
  • the two elements 22, 23 provide convenient recesses at the articulation 24 and at the two free ends 25, 26 to prevent interference with any welding flanges 27, 28, 29, 30 of the two half-collars.
  • Figure 6 shows in section a detail of an alternative embodiment of the seal clamp, similar to the previous one.
  • the half-collars are expanded into a housing socket having a conical base 31 for supporting an O-ring 32 housed in the socket.
  • Figure 7 is a partially sectioned view of a system for sealing the space formed by a plastics container for a metal tank, in which the plastics container has no hatch collar.
  • the container again formed by two coupled half-shells has a through-hole for the hatch.
  • edges of the hole are advantageously shaped like semi-toroidal seatings 34 housing a resilient seal 35 interposed between the seating 34 and the tank 1.
  • An annular rigid compression seating 36 is superimposed outside the container (in two pieces or with suitable recesses for the welding flanges of the two half-shells).
  • the compression seating 36 is urged against the tank 1 by suitable screw compression rods 37, 38 ... 41, engaged in threaded seats in a flange 42 fixed to the hatch 4.
  • the hemispherical end caps 11, 12 of the half-shells 9, 10 may be reinforced by ribs, preferably radial ribs, or by combinations of radial and annular ribs, or may have single inwardly-projecting and suitably spaced projections of the type shown in Figure 5.
  • the dimensions of the ribs may be selected within wide limits and preferably, in the case of annular ribs of the half shells, have spacings of between 10 and 30 cm and sinusoidal or, in any case, rounded profiles without sharp corners and with a peak/peak height of between 5 and 10 cm.
  • the thickness of the walls of the container is conveniently between 5 and 10 mm, which can easily be achieved by rotational moulding processes for high-density polyethylene.
  • the formation of the secondary container with two identical half-shells enables optimal use to be made of a single forming mould of small dimensions, even if the container is intended to house large-capacity metal tanks of 30-40m 3 and hence with diameters and lengths of the order of several metres.
  • the secondary container may be fitted on the metal tank either at the place of installation or, as is preferable, at the place where the metal tank is produced.
  • the secondary container provides adequate protection for the tank against corrosion and any impacts throughout the stages subsequent to production such as transportation to a storage area or to a place of installation and related handling.
  • Figure 8 shows another possible variant which facilitates the handling and storage of the protection system and eliminates the need to provide supports.
  • the container tends to rotate and adopt a stable position only when the end of the hatch is also bearing on the ground, taking up a larger storage area and involving the need to reorient the container with the hatch in the vertical position for transportation and installation.
  • the ribs of the container may have tips shaped to form a flat surface 43 diametrally opposite the hatch or may even be shaped to form support feet which ensure a stable attitude of the container supported on a surface.
  • the tips of the various ribs are spaced by recesses which facilitate the slinging of the system on metal cables passing through the recesses in order to lift it, to load it on transportation means and to install it in a suitable position.
  • the support feet thus formed may also constitute eyes for anchoring to a ballast plate outside the secondary containment disposed in the pit for the underground installation of the system.
  • anchorage to ballast plates may take place by means of binding cables or belts which surround the secondary container externally.
  • the two plastics half-shells which form the secondary container are preferably coupled, as already stated, by thermoplastic welding of the open ends of the half-shells.
  • each of the two half-shells 9, 10 has a flat annular flange 46, 47 turned inwardly at its open end, that is, extending towards the interior of the cylindrical walls of the two half-shells, whether these be of the type with annular ribs or of the type with projections extending inwardly relative to the half shells.
  • the flanges 46, 47 are juxtaposed, preferably but not necessarily in contact with one another, and their free edges bear against the outer surface of the tank 1, possibly with the interposition of a ring segment 48 of plastics material extending around the tank 1 and as far as the hatch.
  • the tank 1, with any interposed segment 48, provides a bearing surface for the edges of the flanges 46, 47 for the application of an external radial force exerted by thermoplastic welding devices operating with heating by contact with the supply plastics welding material.
  • the plastics welding material 49 supplied fills the space present between the flanges, welding them together.
  • Any plastics segment 48 contributes to the welding by partial fusion and, at the same time, forms a thermally insulating barrier with respect to the tank 1.
  • Figure 10 is a section of a detail showing a further improvement of the secondary container which enables a shaft 6 to be formed for access to the hatch 4, the shaft being isolated from the surrounding soil at the bottom and impervious to infiltrations of liquid and being formed by a ring 7 of plastics material welded to the secondary container.
  • the half-shells both in the case of a secondary container formed by half-shells 9, 10 with annular ribs and in the case of a secondary container with projections extending inwardly, the half-shells, one of which 9 is shown partially in Figure 10, form, near the half collar 15 (and 16, Figure 1) or the semitoroidal seating (34, Figure 6) for connection with the hatch 4, a semi-annular rib or collar 50 for supporting the half shell on the external surface of the tank 1.
  • a similar semi-annular collar 52 outside and concentric with the first is formed near the first and provides a fairly wide contact and bearing region, shown by the broken line 53, between the secondary container and the tank 1.
  • An annular space 54 is formed between the collars 50, 52 of the half-shell 9 and the corresponding collars of the half-shell 10 and communicates with the space formed between the two half-shells 9, 10 and the tank 1 by means of suitable recesses of the type shown in Figure 3, formed in the collar 52.
  • the collar 52 extends outside the half-shell 9 to form a semicylindrical rib 57 coaxial with the hatch.
  • a ring 7 of plastics material of suitable thickness, for example 15 mm, is engaged inside the rib 57 and bounds the space in the access shaft 6 to the hatch 4 peripherally.
  • the ring 7 is coupled with the rib 57 by thermoplastic welding with the supply of plastics welding material 55.
  • An access shaft impervious to the surrounding soil and to ground water is thus advantageously produced.
  • At least one connector 56 is formed in the half-shell 9 in the space 54 and is accessible from the shaft for the fixing of safety devices such as a manometer or pressure gauge 58 for indicating changes in pressure in the space which may advantageously be set at a pressure lower than the surrounding atmosphere.
  • safety devices such as a manometer or pressure gauge 58 for indicating changes in pressure in the space which may advantageously be set at a pressure lower than the surrounding atmosphere.
  • Figure 11 shows the open end of the half-shell 9 in the region which surrounds the hatch, sectioned on the line III-III of Figure 10.
  • the connecting flange 46 between the two half-shells which, in this case, is internal, extends up to the space 54 where it is interrupted ensuring the continuity of the space and then starts again from the collar 50 up to the collar 15 (or to the seating 34 of Figure 6).
  • the two half-shells are welded with the supply of thermoplastic material 59 to the external surfaces of the collar 15, of the rib 57 and of the half-shells 9, 10.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Joints Allowing Movement (AREA)
EP95830383A 1995-09-20 1995-09-20 Äussere Schutzvorrichtung und sekundäres Rückhaltesystem für unterirdischen, metallischen Behälter für flüssige Kohlenwasserstoffe und strukturelles Element dafür Expired - Lifetime EP0764596B1 (de)

Priority Applications (7)

Application Number Priority Date Filing Date Title
SI9530236T SI0764596T1 (en) 1995-09-20 1995-09-20 An outer protection and secondary containment system for an underground metal tank for liquid hydrocarbons and a structural element thereof
DE69509384T DE69509384T2 (de) 1995-09-20 1995-09-20 Äussere Schutzvorrichtung und sekundäres Rückhaltesystem für unterirdischen, metallischen Behälter für flüssige Kohlenwasserstoffe und strukturelles Element dafür
ES95830383T ES2132587T3 (es) 1995-09-20 1995-09-20 Un sistema de contencion secundaria y de proteccion externa para un tanque metalico subterraneo para hidrocarburos liquidos y un elemento estructural del mismo.
EP95830383A EP0764596B1 (de) 1995-09-20 1995-09-20 Äussere Schutzvorrichtung und sekundäres Rückhaltesystem für unterirdischen, metallischen Behälter für flüssige Kohlenwasserstoffe und strukturelles Element dafür
AT95830383T ATE179382T1 (de) 1995-09-20 1995-09-20 Äussere schutzvorrichtung und sekundäres rückhaltesystem für unterirdischen, metallischen behälter für flüssige kohlenwasserstoffe und strukturelles element dafür
DK95830383T DK0764596T3 (da) 1995-09-20 1995-09-20 Ydre beskyttelses- og sekundært indeslutningssystem til en underjordisk metaltank til væskeformige carbonhydrider og strukt
GR990401534T GR3030461T3 (en) 1995-09-20 1999-06-09 An outer protection and secondary containment system for an underground metal tank for liquid hydrocarbons and a structural element thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP95830383A EP0764596B1 (de) 1995-09-20 1995-09-20 Äussere Schutzvorrichtung und sekundäres Rückhaltesystem für unterirdischen, metallischen Behälter für flüssige Kohlenwasserstoffe und strukturelles Element dafür

Publications (2)

Publication Number Publication Date
EP0764596A1 true EP0764596A1 (de) 1997-03-26
EP0764596B1 EP0764596B1 (de) 1999-04-28

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP95830383A Expired - Lifetime EP0764596B1 (de) 1995-09-20 1995-09-20 Äussere Schutzvorrichtung und sekundäres Rückhaltesystem für unterirdischen, metallischen Behälter für flüssige Kohlenwasserstoffe und strukturelles Element dafür

Country Status (7)

Country Link
EP (1) EP0764596B1 (de)
AT (1) ATE179382T1 (de)
DE (1) DE69509384T2 (de)
DK (1) DK0764596T3 (de)
ES (1) ES2132587T3 (de)
GR (1) GR3030461T3 (de)
SI (1) SI0764596T1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007104699A1 (de) * 2006-03-13 2007-09-20 Richter Guenter Doppelwandiger behälter
FR2912386A1 (fr) * 2007-02-14 2008-08-15 Atuser Sarl Installation souterraine de stockage d'huile alimentaire
DE102010051374A1 (de) * 2010-10-20 2012-04-26 Holzner Druckbehälter GmbH Druckbehälter
CN107060449A (zh) * 2017-05-16 2017-08-18 佛山科学技术学院 一种混凝土筒中筒结构储油罐
JP2017203349A (ja) * 2016-05-13 2017-11-16 玉田工業株式会社 地下埋設型液体タンクの埋設方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009056516A1 (de) * 2009-12-02 2011-06-09 Ucon Ag Containersysteme Kg Doppelwand-Vakuumcontainer
DE102020117470A1 (de) * 2020-07-02 2022-01-05 ENREGIS GmbH Einrichtung zum Speichern eines Fluids

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1752912A1 (de) * 1968-08-03 1971-11-04 Hans Hautmann Verfahren zur Herstellung eines Innenbehaelters in einem Fluessigkeitstank
US4672366A (en) 1981-01-09 1987-06-09 Total Containment International, Inc. Subterranean tank leak containment and detection system
US4676093A (en) 1985-05-28 1987-06-30 Owens-Corning Fiberglas Corporation Double-wall underground tank
US4739659A (en) 1983-10-21 1988-04-26 Sharp Bruce R Double wall ribbed storage tanks
US5033638A (en) * 1990-09-28 1991-07-23 Ecovault Corporation Above ground hazardous liquid storage apparatus
US5115936A (en) * 1991-01-23 1992-05-26 Owens-Corning Fiberglas Corporation Double wall underground storage tank
US5335815A (en) * 1993-04-09 1994-08-09 The Reinforced Earth Company Storage tank in a precast, protective shell

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1752912A1 (de) * 1968-08-03 1971-11-04 Hans Hautmann Verfahren zur Herstellung eines Innenbehaelters in einem Fluessigkeitstank
US4672366A (en) 1981-01-09 1987-06-09 Total Containment International, Inc. Subterranean tank leak containment and detection system
US4739659A (en) 1983-10-21 1988-04-26 Sharp Bruce R Double wall ribbed storage tanks
US4676093A (en) 1985-05-28 1987-06-30 Owens-Corning Fiberglas Corporation Double-wall underground tank
US5033638A (en) * 1990-09-28 1991-07-23 Ecovault Corporation Above ground hazardous liquid storage apparatus
US5115936A (en) * 1991-01-23 1992-05-26 Owens-Corning Fiberglas Corporation Double wall underground storage tank
US5335815A (en) * 1993-04-09 1994-08-09 The Reinforced Earth Company Storage tank in a precast, protective shell

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007104699A1 (de) * 2006-03-13 2007-09-20 Richter Guenter Doppelwandiger behälter
FR2912386A1 (fr) * 2007-02-14 2008-08-15 Atuser Sarl Installation souterraine de stockage d'huile alimentaire
WO2008116988A1 (fr) * 2007-02-14 2008-10-02 Atuser Installation souterraine de stockage d'huile alimentaire
DE102010051374A1 (de) * 2010-10-20 2012-04-26 Holzner Druckbehälter GmbH Druckbehälter
DE102010051374B4 (de) * 2010-10-20 2012-12-06 Holzner Druckbehälter GmbH Druckbehälter
JP2017203349A (ja) * 2016-05-13 2017-11-16 玉田工業株式会社 地下埋設型液体タンクの埋設方法
CN107060449A (zh) * 2017-05-16 2017-08-18 佛山科学技术学院 一种混凝土筒中筒结构储油罐

Also Published As

Publication number Publication date
DK0764596T3 (da) 1999-11-08
DE69509384T2 (de) 1999-08-26
EP0764596B1 (de) 1999-04-28
SI0764596T1 (en) 1999-08-31
ES2132587T3 (es) 1999-08-16
GR3030461T3 (en) 1999-10-29
ATE179382T1 (de) 1999-05-15
DE69509384D1 (de) 1999-06-02

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