EP1388705A2 - Behälter aus Metal für Flüssiggas unter Druck - Google Patents

Behälter aus Metal für Flüssiggas unter Druck Download PDF

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Publication number
EP1388705A2
EP1388705A2 EP03360095A EP03360095A EP1388705A2 EP 1388705 A2 EP1388705 A2 EP 1388705A2 EP 03360095 A EP03360095 A EP 03360095A EP 03360095 A EP03360095 A EP 03360095A EP 1388705 A2 EP1388705 A2 EP 1388705A2
Authority
EP
European Patent Office
Prior art keywords
wall
tank
spacers
liquefied gas
spacer
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.)
Withdrawn
Application number
EP03360095A
Other languages
English (en)
French (fr)
Other versions
EP1388705A3 (de
Inventor
Robert Ghougassian
Jean Wendling
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.)
Suder SA
Original Assignee
Suder SA
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 Suder SA filed Critical Suder SA
Publication of EP1388705A2 publication Critical patent/EP1388705A2/de
Publication of EP1388705A3 publication Critical patent/EP1388705A3/de
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
    • F17C1/14—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge constructed of aluminium; constructed of non-magnetic steel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C3/00—Vessels not under pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01—Shape
    • F17C2201/0147—Shape complex
    • F17C2201/0157—Polygonal
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/01—Reinforcing or suspension means
    • F17C2203/011—Reinforcing means
    • F17C2203/013—Reinforcing means in the vessel, e.g. columns
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0602—Wall structures; Special features thereof
    • F17C2203/0607—Coatings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0634—Materials for walls or layers thereof
    • F17C2203/0636—Metals
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/032—Hydrocarbons
    • F17C2221/035—Propane butane, e.g. LPG, GPL
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0146—Two-phase
    • F17C2223/0153—Liquefied gas, e.g. LPG, GPL
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
    • F17C2223/033—Small pressure, e.g. for liquefied gas

Definitions

  • the invention relates to a metal tank for liquefied gas under pressure.
  • the present invention relates to the field of the manufacture of metal tanks intended to contain a liquefied gas under pressure, such a tank being, more particularly, of the type transportable and for domestic use.
  • tanks of the bottle type, borrow, in a way usual, a substantially cylindrical shape and have a ferrule closed at its ends by elements forming semi-elliptical cover.
  • These bottles are likely to be stored vertically through a base, generally of annular shape, welded on the part of elliptical shape forming the bottom of such a bottle.
  • a threaded mouth for the receipt of a pressure reducing valve or a valve, itself or itself capable of being protected through a tubular sleeve likely to be screwed onto said bottle.
  • a handle articulated generally equips this sleeve.
  • a first solution consists to be formed on the upper part, of elliptical shape, of these tanks, one or more handles offset from the axis of the bottle. It follows that by coming to seize this last through such a handle the bottle comes to swing around the latter, so that its center of gravity comes to be placed in its vertical alignment. Here again under the effect of this tilting the bottle may strike the user's leg and injuring him. It will also be noted that a such arrangement of the handles does not make it possible to respond to the initial problem, namely bringing the line closer to the weight of the bottle relative to the body line.
  • the present invention aims to propose a new type metal tank intended to contain a liquefied gas under pressure, such a reservoir being obtained through setting work of a manufacturing process, again, object of the present invention.
  • the invention relates to a method for manufacturing a metal tank for pressurized liquefied gas, reservoir adopting a general parallelepiped shape and consisting of two half shells each having a extended wall, at the periphery, by a curved rim, this process characterized by the fact that, on the one hand, has spacers inside the tank to extend between the two walls of these two half shells, that, on the other hand, these spacers are made integral with these two walls by welding and that, on the other hand, we weld the two half shells at their curved peripheral edges.
  • Another additional feature is that, when a spacer is made integral with the wall of a half shell, we proceed to weld such a spacer against the internal face of this wall, this from the outside of this tank and through this wall.
  • the invention also relates to a metal gas tank liquefied under pressure in a general form parallelepiped and made up of the assembly of two half shells each having an extended wall, in periphery, by a curved edge at the level of which is made an assembly of these two half shells by welding, characterized by the fact that this tank has stiffeners arranged to provide, after having submitted this reservoir at test pressure, volume deformation permanent to this tank at most equal to 1%.
  • the stiffeners are, at least in part, consisting of spacers extending internally to said tank and between the walls of the two half shells, these spacers being, moreover, made integral with these walls by welding.
  • the wall of at least a half shell has through openings, each, by a spacer and that the latter is made integral with this wall by welding, this at the level of the external face of this wall and from the outside of the tank.
  • Yet another characteristic relates to the fact that a spacer is secured to the wall by at least a half shell by being welded against the internal face of such wall, this through a weld made from the outside of the reservoir and through this wall.
  • the tank adopts a parallelepiped shape and has two substantially parallel walls which makes it possible to constitute a tank having a significantly reduced width compared to existing tank type tanks, for the same gas capacity. It follows that transport, by a person from a gas tank according to the invention turns out well easier.
  • the particular shape of such a tank advantageously optimizes storage and transport of several of these tanks.
  • stiffeners give such a tank an excellent resistance to the pressure of the liquefied gas which is exerted, in particular, on the walls of this tank.
  • a tank according to the invention has a significantly lower weight than a type tank cylindrical.
  • the present invention relates to the field of tanks metallic, particularly transportable and for use domestic gas intended to contain a liquefied gas under pressure.
  • Such a tank 1 adopts a generally parallelepiped shape and consists of the assembly of two half shells 2, 3 resulting from one or more stamping passes of a sheet chosen from a steel capable of meeting the constraints in the field.
  • this steel will be chosen so that, under the effect of a test pressure corresponding to 1.5 times the operating pressure, tank 1 has deformation permanent volume at most equal to 1%.
  • a tank 1 designed in such steel should be able to support, before burst, a pressure that is three times greater than this operating pressure and an equal volume increase or greater than 6%.
  • each half-shell 2, 3 is defined at least in part by a wall 4, 5 designed so that, after assembly of these two half shells 2, 3 and within said tank 1, one 4 of these walls constitutes a front wall 4 of this tank 1 while the other wall 5 constitutes a wall rear 5 of this tank 1, said front wall 4 and rear 5 being substantially parallel.
  • such a wall 4; 5 is extended, at the periphery, by a curved rim 6; 7 designed so that the curved edge 6 of a half shell 2 can cooperate with the curved edge 7 of the other half-shell 3 during the assembly of these two half shells 2, 3 for define a reservoir 1.
  • this assembly is, more particularly, produced by welding, for example a perimeter type welding.
  • this tank 1 comprises stiffeners arranged to provide permanent volume deformation to this tank 1 at most equal to 1%, this after having submitted this tank 1 at a corresponding test pressure, plus in particular, at 1.5 times the operating pressure.
  • Such stiffeners are, at least in part, constituted by spacers 8 extending internally to said tank 1 and between the walls 4, 5 of the two half shells 2, 3, these spacers 8 being, moreover, made integral with these walls 4, 5 by welding.
  • spacers 8 occupy an area between 0.5 and 9% (preferably between between 1 and 6%) of the surface of a wall 4; 5.
  • Such a mode of achieves good resistance results from the tank 1 at the pressure of the liquefied gases contained therein.
  • the spacers 8 are arranged, at a wall 4, 5, of aligned in at least two rows 11, 11 ', 11' parallel.
  • the spacers 8 of two rows adjacent 11, 11 ' are arranged so as to respect a regular matrix.
  • Such a matrix can be of the type rectangular (figure 5), rectangular, square (figure 3), triangular or whatever.
  • a spacer 8 is defined by a rod 12 or a tube section between 2 and 10mm, preferably around 5mm.
  • the spacers 8 adopting such a shape are preferably arranged in a square matrix and define two sets of rows 11, 11 '...; 13, 13 '... the one 11 perpendicular to the other 13.
  • spacers 8 are located at a distance between 20 and 50mm, preferably of the order of 35mm, from each other.
  • rows 11; 13 of spacers 8 are located one distance between 20 and 50mm, preferably of the order of 35mm, from each other.
  • FIGS. 4 and 5 Another embodiment has been represented in FIGS. 4 and 5. of the invention in which a spacer 8 is defined by a blade 14 whose width is between 15 and 35mm, of preferably of the order of 25mm, and whose thickness is included between 0.5 and 1.5mm, preferably between 0.8 and 1.2mm.
  • said blades 14 are oriented in the same direction which corresponds to a mode preferred embodiment knowing that another embodiment (not shown) can be envisaged in which the blades 14 can be arranged in at least two sets of rows angularly offset between them, said blades 14 being then oriented in the direction of such a row.
  • the spacers 8 adopting the form of such a blade 14 are located within the same row 11, at a distance between 15 and 35mm, from preferably around 25mm from each other.
  • the rows 11 of blades 14 are located at a distance between 20 and 40mm, preferably of the order of 30mm, the each other.
  • the stiffeners are arranged to obtain, after having subjected the reservoir 1 to a pressure test, a permanent volume deformation at this tank 1 at most equal to 1%.
  • these stiffeners are arranged to not provide no permanent volume deformation at tank 1 (zero permanent volume deformation).
  • these stiffeners are constituted by spacers 8 (of the type mentioned above) occupying at least 1.5% of the surface of the wall 4, 5 of a half shell 2, 3.
  • spacers 8 of the type mentioned above
  • spacers 8 it will be observed that good results are obtained for spacers 8 occupying between 1.5 and 3% of such an area.
  • the walls 4, 5 of the two half shells 2, 3 adopt, in such a case, a substantially planar shape.
  • FIG. 6 Another embodiment illustrated in FIG. 6 consists of that the stiffeners, arranged to provide a deformation permanent volume at most equal to 1%, consist of a part, by spacers 8 (of the aforementioned type) occupying at plus 1.5% of the surface of the wall 4, 5 of a half shell 2, 3 and, on the other hand, by folds 16 which have the two half shells 2, 3. Such folds 16 are provided at level of the walls 4, 5 of these half shells 2, 3 and are between the spacers 8.
  • these folds 16 are preferably oriented towards the volume inside the tank 1.
  • the spacers 8 are made integral with the walls 4, 5 of the two half shells 2, 3 by welding.
  • At least one of these walls 4, 5 has openings 9 crossed, each by a spacer 8 and made by drilling or (and preferably) by punching. It is, more particularly, at the level of these openings 9 that such a spacer 8 is made integral with such a wall 4, 5, more particularly by welding at the face external of said wall 4, 5 and on the external side of the tank 1.
  • the front wall 4 and the rear wall 5 of this tank 1 each have openings 9 crossed by spacers 8.
  • such a spacer 8 can be installation at reservoir 1, after assembly of the two half shells 2, 3, and realizing the engagement of this spacer 8 through an opening 9 that the wall has front 4 (respectively rear 5) until this spacer 8 opens out through an opening in correspondence at the rear wall 5 (respectively before 4).
  • Another embodiment consists in ensuring a commitment of such a spacer 8 through an opening 9 that has one of the walls (front 4 or rear 5) before making this spacer 8 secured to this wall (in particular by welding) to then ensure, during the assembly of the two half shells 2, 3, the engagement of such a spacer 8 at through an opening in the other flat wall (rear 5 or front 4).
  • the spacers 8 are made integral, by welding, with the internal face 10 of at least one of the walls 4; 5 of the two half shells 2, 3.
  • Such spacers 8 then extend, from this wall 4; 5, substantially perpendicular to the plane of the latter 4; 5 and towards the other wall 5; 4.
  • such spacers 8 can be welded against the internal face 10 of the wall 4 of a first half-shell 2. Such welding is preferably carried out from the outside. from this tank 1 and through the wall 4 of this first half shell 2.
  • such spacers 8 can be arranged to pass through openings 9 made through the wall 5 of the second half-shell 3. That is, more particularly, at the level of these openings 9 that such a spacer 8 is made integral with this second half-shell 3 by welding.
  • the spacers 8 are made integral, by welding, of the internal face 10 of the wall 4; 5 of the two half shells 2, 3. Such a welding is ensured, either of successively (welding the spacers 8 against a wall 4, then welding against the other wall 5), either so simultaneously.
  • a weld is, preferably performed from outside the tank 1 and at through walls 4, 5 of these two half shells 2, 3.
  • a spacer 8 may or may not be provided of folds 16 constituting stiffeners.
  • the tank 1 receives, at the internal face 10 of the wall 4 of at least half a shell 2, means arranged for define a support for at least one spacer 8.
  • Such spacer support means 8 are arranged to ensure positioning of such a spacer 8 relative to a such wall 4, this while awaiting welding (against this last 4 or through it 4) of such a spacer 8.
  • a preferred embodiment of the invention consists in that these spacer support means are defined by a template located on the internal face 10 of said wall 4.
  • a such a template is designed to receive at least a portion (or even all) of the spacers 8 intended to be located inside said tank 1.
  • such a template is designed so as to allow welding a spacer 8 against the internal face 10 of the wall 4 of at least half a shell 2, this preferably by the exterior of this tank 1 and through said wall 4.
  • Another feature of this template is that it is, at least in part, defined in a plastic material.
  • At least a half shell 2, 3 is provided with an orifice 15 intended to be fitted with a pressure reducing valve or a valve allowing filling and emptying of the tank 1.
  • Such a metal tank 1 can still receive, externally, a protective envelope, preferably made of synthetic material, in particular capable of protecting it against shocks.
  • a protective envelope is, moreover, likely to define, in the lower part of said tank 1, a base through which it can rest stably on the ground.
  • a gripping member for example a handle
  • a gripping member directly on the upper part of tank 1, in particular to at least one of the two half shells 2, 3 or the protective cover above.
  • the invention also relates to a method for manufacturing of a metal tank 1 of the aforementioned type.
  • This process consists in that, on the one hand, we have, internally to the reservoir 1, spacers 8 intended for extend between the two walls 4, 5 of the two half shells 2, 3, that, on the other hand, these spacers 8 are made integral these two walls 4, 5 by welding and that, on the other hand, the two half shells 2, 3 are assembled by welding at the level of their curved peripheral edges 6,7.
  • the wall 4; 5 from at least one of the half shells 2; 3 comprises openings 9 intended to be crossed by the spacers 8.
  • the latter 8 are then welded to the wall 4; 5 corresponding to the level of the external face of this wall 4; 5, this from outside the tank 1.
  • the spacers 8 are intended to be welded against the internal face 10 of the wall 4; 5 of at least one of the half shells 2; 3. These spacers 8 are then welded to such a wall 4; 5 per the exterior of the reservoir 1 and through said wall 4; 5.
  • the preferred embodiments of the invention consist either of spacers 8 passing through the wall 4, 5 of the two half shells 2, 3, either in spacers 8 made integral with the internal face 10 of the wall 4, 5 of the two half shells 2.3.
  • the spacer support means 8 are located on the internal face 10 of a wall 4, 5 before placing the spacers 8 to inside the tank 1.
  • the means support are, first of all, located at the level of the wall 4; 5 before associating with these support means at least one spacer 8 (in particular by engagement within these means support).
  • Another embodiment consists in making a assembly constituted by spacers 8 associated with the means support before installing this assembly at the face internal 10 of the wall 4, 5 (simultaneous implantation of spacers 8 and support means).
  • the walls 4, 5 of two half shells 2, 3 adopt a substantially planar shape, this in the case of a sufficient concentration of spacers 8 (at least 1.5% of the surface) so that, under pressure tank 1 shows no deformation permed.
  • another characteristic of the method according to the invention consists in proceeding, at the level of the wall 4, 5 at least minus half a shell 2, 3 (preferably two half shells 2, 3) and between two spacers 8, when making folds 16 in order to ensure stiffening of said wall 4, 5.
  • Such folds 16 are preferably made before assembling the two half shells 2, 3, or even before placing in place spacers 8 and / or support means, or even still (and preferably) in the stamping phase of such half shell 2, 3.
  • such folds 16 are, of preferably oriented towards the interior of the tank 1 and are produced by deformation of said wall 4, 5, in particular by stamping a sheet, more particularly at from a substantially planar half-shell wall 2, 3.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
EP03360095A 2002-08-09 2003-08-11 Behälter aus Metal für Flüssiggas unter Druck Withdrawn EP1388705A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0210165A FR2843441B1 (fr) 2002-08-09 2002-08-09 Reservoir metallique pour gaz liquefie sous pression
FR0210165 2002-08-09

Publications (2)

Publication Number Publication Date
EP1388705A2 true EP1388705A2 (de) 2004-02-11
EP1388705A3 EP1388705A3 (de) 2005-06-29

Family

ID=30129731

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03360095A Withdrawn EP1388705A3 (de) 2002-08-09 2003-08-11 Behälter aus Metal für Flüssiggas unter Druck

Country Status (2)

Country Link
EP (1) EP1388705A3 (de)
FR (1) FR2843441B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109073150A (zh) * 2016-02-26 2018-12-21 株式会社格子技术 曲面组合式方形压力罐

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE711117C (de) * 1937-01-13 1941-09-26 Ambi Budd Presswerk G M B H Tragbarer Druckbehaelter
NL8402065A (nl) * 1984-06-28 1986-01-16 Nagron Steel & Aluminium Drukvat.
FR2823288A1 (fr) * 2001-04-09 2002-10-11 Gli Internat Recipient pour fluide sous pression et son procede de fabrication

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109073150A (zh) * 2016-02-26 2018-12-21 株式会社格子技术 曲面组合式方形压力罐
EP3421863A4 (de) * 2016-02-26 2019-11-06 Latticetechnology Co.,ltd Kurvenkombinierter quadratischer drucktank
US10543745B2 (en) 2016-02-26 2020-01-28 Lattice Technology Co., Ltd. Curve-combined square pressure tank
US11338667B2 (en) 2016-02-26 2022-05-24 Latticetechnology Co., Ltd. Curve-combined square pressure tank
US11731505B2 (en) 2016-02-26 2023-08-22 Latticetechnology Co., Ltd. Curve-combined square pressure tank

Also Published As

Publication number Publication date
FR2843441B1 (fr) 2004-11-19
FR2843441A1 (fr) 2004-02-13
EP1388705A3 (de) 2005-06-29

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