NO141925B - PROCEDURE FOR MANUFACTURING A SFAEROID, DOUBLE WALL LARGE CONTAINER - Google Patents
PROCEDURE FOR MANUFACTURING A SFAEROID, DOUBLE WALL LARGE CONTAINER Download PDFInfo
- Publication number
- NO141925B NO141925B NO741837A NO741837A NO141925B NO 141925 B NO141925 B NO 141925B NO 741837 A NO741837 A NO 741837A NO 741837 A NO741837 A NO 741837A NO 141925 B NO141925 B NO 141925B
- Authority
- NO
- Norway
- Prior art keywords
- tank
- shell
- large container
- procedure
- inner shell
- Prior art date
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 10
- 238000000034 method Methods 0.000 title description 9
- 239000011152 fibreglass Substances 0.000 claims description 7
- 238000003475 lamination Methods 0.000 claims description 7
- 239000011347 resin Substances 0.000 claims description 6
- 229920005989 resin Polymers 0.000 claims description 6
- 238000005507 spraying Methods 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims 1
- 239000010410 layer Substances 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 239000000446 fuel Substances 0.000 description 4
- 230000003068 static effect Effects 0.000 description 4
- 239000002650 laminated plastic Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 239000003673 groundwater Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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
- 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
- B65D90/505—Arrangements of indicating or measuring devices of leakage-indicating devices comprising porous spaces or porous layers in walls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/06—Fibrous reinforcements only
- B29C70/08—Fibrous reinforcements only comprising combinations of different forms of fibrous reinforcements incorporated in matrix material, forming one or more layers, and with or without non-reinforced layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/302—Details of the edges of fibre composites, e.g. edge finishing or means to avoid delamination
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D22/00—Producing hollow articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D22/00—Producing hollow articles
- B29D22/003—Containers for packaging, storing or transporting, e.g. bottles, jars, cans, barrels, tanks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Moulding By Coating Moulds (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Cultivation Receptacles Or Flower-Pots, Or Pots For Seedlings (AREA)
- Table Devices Or Equipment (AREA)
Description
Den foreliggende oppfinnelse vedrører en framgangsmåte The present invention relates to a method
av den art som er angitt i innledningen til patentkravet, for framstilling av en sfæroid, dobbelvegget storbeholder av glassfiberforsterket plastlaminat. Slike beholdere kan brukes som tank for flytende brennstoff eller drivstoff eller som silo for forskjellige masser. of the type specified in the introduction to the patent claim, for the production of a spheroid, double-walled large container of glass fiber reinforced plastic laminate. Such containers can be used as a tank for liquid fuel or fuel or as a silo for different masses.
For lagringen av flytende brenn- og drivstoff, og likeledes For the storage of liquid fuel and fuel, and likewise
av kjemikalier av tilsvarende art, er det av hensyn til grunnvann-beskyttelsen . ønskelig med strengere sikkerhetsforholdsregler og slike er også blitt foreskrevet. Således er det allerede flere steder nødvendig å benytte dobbelttanker og en lekkasjevarsler som er utformet etter offentlige forskrifter. For eksempel kan vanlige ståltanker i enkelte soner bare godkjennes i betongkar med lekkasjevarsler. Det er også kjent å forsyneN ståltanker med en fullstendig glassfiberforsterket plastkappe. Denne forholds-regel utgjør imidlertid bare en delløsning av problemet, fordi det er vanskelig å oppnå en ensartet forbindelse mellom lamineringen og ståloverflaten i tanken. I områder hvor forbindelsen ikke er fast, kan det danne seg lokale korrosjoner, delvis forsterket av korroderende midler i plastlaminatet, som ikke er fullstendig utherdet. Dessuten er plastlamineringen vanligvis ikke slik statisk dimensjonert, at den alene kan oppta hele fulltrykket, hvorved en lekkasje i ståltanken ikke kan lokaliseres. of chemicals of a similar nature, it is for reasons of groundwater protection. stricter safety precautions are desirable and such have also been prescribed. Thus, it is already necessary in several places to use double tanks and a leak detector that is designed according to public regulations. For example, ordinary steel tanks in certain zones can only be approved in concrete vessels with leak warnings. It is also known to provide N steel tanks with a complete glass fiber reinforced plastic jacket. However, this precaution constitutes only a partial solution to the problem, because it is difficult to achieve a uniform connection between the lamination and the steel surface in the tank. In areas where the connection is not firm, local corrosion can form, partly reinforced by corrosive agents in the plastic laminate, which has not fully cured. In addition, the plastic lamination is usually not statically dimensioned in such a way that it alone can absorb the entire full pressure, whereby a leak in the steel tank cannot be located.
Den vanlige konstruksjon av en glassfiberforsterket plasttank eller -silo består av en sylinderformet del, hvorpå det blir på-laminert et hvelvet tanklokk. Bortsett fra det faktum, at slike forbindelsessteder begunstiger dannelsen av lekkasje - den lave overflatespenning til fyringsolje viser for eksempel en gjennom-trengningsevne i et kapillar som er 14 ganger større enn vann - The usual construction of a fiberglass-reinforced plastic tank or silo consists of a cylindrical part, on which a domed tank lid is laminated. Apart from the fact that such junctions favor the formation of leakage - the low surface tension of fuel oil shows, for example, a permeability in a capillary that is 14 times greater than that of water -
så er omkostningene for lamineringen av disse tank- henholdsvis silobunner på en sylinder forholdsvis høye. Dessuten er det med then the costs for the lamination of these tank or silo bottoms on a cylinder are relatively high. Moreover, it is included
denne geometriske form nokså vanskelig å framstille to koaksiale, sylinderformete tanker, som hver for seg er frittstående, på en slik måte at hele det statiske trykk kan opptas på ethvert punkt. this geometric shape rather difficult to produce two coaxial, cylindrical tanks, each of which is independent, in such a way that the entire static pressure can be absorbed at any point.
Klebing av et forsterkende lag til et indre lag som er bare delvis herdet, med etterfølgende herding av hele laminatet er kjent f.eks. britisk patentskrift 1.205968. Bonding of a reinforcing layer to an inner layer which is only partially hardened, with subsequent hardening of the entire laminate is known, e.g. British patent document 1.205968.
Oppfinneren har allerede foreslått en framgangsmåte for framstilling av en eggformet storbeholder ( sveitsisk patentskrift nr. 542.050). Tilsvarende kan denne framgangsmåte benyttes for framstilling av hvilket som helst sfæroid hullegeme. Den valgte eggform har i statisk henseende visse fordeler og utgjør en særlig interess-ant konstruksjon med hensyn til beholderens overflate i forhold til dens volum. Dessuten blir transportproblemene redusert ved store eggformete beholdere. The inventor has already proposed a method for producing an egg-shaped large container (Swiss patent document no. 542,050). Correspondingly, this procedure can be used for the production of any spheroid hollow body. The chosen egg shape has certain advantages from a static point of view and constitutes a particularly interesting construction with respect to the container's surface in relation to its volume. In addition, transport problems are reduced with large egg-shaped containers.
Den foreliggende oppfinnelse har til formål å skaffe en framgangsmåte for framstilling av en sfæroid, dobbeltvegget storbeholder som ikke er beheftet med de ulemper som kjente beholdere av denne art har. The purpose of the present invention is to provide a method for producing a spheroid, double-walled large container which is not affected by the disadvantages that known containers of this type have.
Ifølge oppfinnelsen er framgangsmåten for fram-s&i-lling av-en slik stor-beholider, idet denne omfatter et indre skall og et ytre skall som omslutter dette, kjennetegnet ved de trekk som er angitt i patentkravet. According to the invention, the method for producing such a large container, as this comprises an inner shell and an outer shell which encloses this, is characterized by the features specified in the patent claim.
Utførelsesformen av framgangsmåte ifølge oppfinnelsen er neden-for beskrevet nærmere under henvisning til tegningen, hvor: Fig. 1 viser en fyringsoljetank som er framstilt ved framgangsmåten ifølge oppfinnelsen, og The embodiment of the method according to the invention is described in more detail below with reference to the drawing, where: Fig. 1 shows a fuel oil tank produced by the method according to the invention, and
fig. 2 viser et snitt gjennom påfyllingsåpningen til tanken som er vist i fig. 1, i større målestokk. fig. 2 shows a section through the filling opening of the tank shown in fig. 1, on a larger scale.
Den foreliggende oppfinnelse går ut fra den erkjennelse, at be-nyttelsen av en dobbeltank av glassfiberlaminert plast med to fullstendig innbyrdes adskilte skall og en mellomliggende, innebygget varsler utgjør den ideelle løsning, idet hvert tankskall skal være istand til å oppta den fullstendige statiske påkjenning. Med en slik konstruksjon sikres ontimal sikkerhet. Hvis det opptrer en lekkasje i tankens indre, så blir denne straks angitt av 1ekkasjevarsleren. Det ytre tankeskall vil oppta lekkasjen uten at det kan oppstå skade i grunnvannet og lekkasjevarsleren gjør tankbesitteren opp-merksom på, at han før eller senere må reparere skaden som er opp-stått. The present invention is based on the recognition that the use of a double tank made of fiberglass laminated plastic with two completely mutually separated shells and an intermediate, built-in warning constitutes the ideal solution, as each tank shell must be able to absorb the complete static stress. With such a construction, optimum safety is ensured. If a leak occurs in the interior of the tank, this is immediately indicated by the 1excavation detector. The outer tank shell will absorb the leak without causing damage to the groundwater and the leak detector alerts the tank owner that sooner or later he must repair the damage that has occurred.
Framgangsmåten består i at en metall- eller glassfiberlaminert plastflens 10 blir'anbragt på en dreibart opplagret aksel ifølge et eldre forslag fra oppfinneren. Denne akselen tjener til opptak av en formgivende sekk. som ved siden av eggeformen kan ha enhver annen form. Denne sekk blir blåst opp ved hjelp av trykkluft. Sekken, som ved hjelp av et anslag på akselen blir holdt fast i lengderetning, blir nå satt i en langsom dreiebevegelse. For dette formål blir akselen drevet av en motor ved hjelp av kjente overføringsorganer. Et fler-komponentsprøyteanlegg av kjent type sprøyter først et gel-harpiks-belegg på overflaten av sekken som blir rotert med konstant hastighet. Deretter blir det påsprøytet en blanding av glassfiber og kunst-harpiks, idet sprøyteanordningen under lamineringen blir beveget fram og tilbake med i det minste tilnærmet konstant hastighet. Når de første laminatsjikt er herdet, så kan luften slippes ut av sekken, hvorpå sekken blir trukket ut av skallet og benyttet for framstilling av et ytterligere skall. The method consists in a metal or glass fiber laminated plastic flange 10 being placed on a rotatably supported shaft according to an older proposal from the inventor. This shaft is used to receive a shaping bag. which besides the egg shape can have any other shape. This bag is inflated using compressed air. The bag, which is held in place longitudinally by means of a stop on the axle, is now set in a slow turning movement. For this purpose, the shaft is driven by a motor by means of known transmission means. A multi-component spraying plant of a known type first sprays a gel-resin coating on the surface of the bag which is rotated at a constant speed. A mixture of glass fiber and artificial resin is then sprayed on, the spraying device being moved back and forth during the lamination at at least an approximately constant speed. When the first laminate layers have hardened, the air can be released from the bag, after which the bag is pulled out of the shell and used for the production of a further shell.
En slik framgangsmåte er altså foreslått i sveitsisk patentskrift nr. 542.050. Den skal derfor ikke beskrives nærmere her. Such a procedure is therefore proposed in Swiss patent document no. 542,050. It should therefore not be described in more detail here.
De nye framgangsmåtetrinn blir så gjennomført. The new procedural steps are then carried out.
Etter framstillingen av den ønskede laminatsjikt-tykkelse på After the production of the desired laminate layer thickness of
den indre tank 11, plasserer man ved enkel pålegning en harpiksbestandig, porøs matte 12 med en tykkelse på minst 3 mm hensikts-messig 5 mm over hele ytterflaten til den første tank før overflate-sjiktet er fullstendig herdet. Deretter kan så denne tank settes i en konstant dreiebevegelse ved hjelp av den allerede innlaminerte, sylinderformete skalldel med plast- eller stålflens. Deretter blir ved sprøyting en andre glassfiberarmert plasttank 13 påført den porøse matte 12 med ønsket laminattykkelse og tilsvarende laminatoppbygging (gel-harpiksovertrekk), egentlig lamineringsharpiks med glassfiber-armering, såvel som et ytre gel-sjikt. Forut for gjennomføringen av lamineringsarbeidet for det andre, ytre tanklegeme, blir en nålesonde 14 for tankens lekkasjevarsler 15 innledet direkte i den porøse matte-konstruksjon 12, som ved dannelsen av en lekkasje i den indre tank blir gjennomfuktet med fyllvæske, hvorved lekkasjevarsleren 15 utløser alarm. I et slikt tilfelle blir imidlertid tetningsfunksjonen fullstendig overtatt av den ytre tanken, slik at hendelsen ikke kan føre til katastrofe. I fig. 1 og 2 er det dessuten inntegnet et i prin-sippet kjent utluftingsrør 16. the inner tank 11, a resin-resistant, porous mat 12 with a thickness of at least 3 mm, preferably 5 mm is placed by simple application over the entire outer surface of the first tank before the surface layer has completely hardened. This tank can then be set in a constant turning movement using the already laminated, cylinder-shaped shell part with a plastic or steel flange. Then, by spraying, a second fiberglass-reinforced plastic tank 13 is applied to the porous mat 12 with the desired laminate thickness and corresponding laminate build-up (gel-resin coating), actually lamination resin with fiberglass reinforcement, as well as an outer gel layer. Prior to the completion of the lamination work for the second, outer tank body, a needle probe 14 for the tank's leak detector 15 is introduced directly into the porous mat construction 12, which, upon the formation of a leak in the inner tank, is soaked with filling liquid, whereby the leak detector 15 triggers an alarm . In such a case, however, the sealing function is completely taken over by the external tank, so that the event cannot lead to disaster. In fig. 1 and 2, a ventilation pipe 16 known in principle is also drawn.
Laminatsjikttykkelsen til veggen til den ytre tank utgjør ca. 8-10 mm, mens den porøse matte som utfyller hulrommet mellom de to tanker har en tykkelse på 3-5 mm. The laminate layer thickness of the wall of the outer tank amounts to approx. 8-10 mm, while the porous mat that fills the cavity between the two tanks has a thickness of 3-5 mm.
Ved hjelp av framgangsmåten ifølge oppfinnelsen kan det framstilles sfæroide tanker og siloer med ønsket geometrisk form på rasjonell måte, idet framgangsmåten ifølge oppfinnelsen også gir bestemte økonomiske fordeler. By means of the method according to the invention, spheroid tanks and silos with the desired geometric shape can be produced in a rational manner, as the method according to the invention also provides certain economic advantages.
Enkelte av de tanker som er blitt serieframstilt hittil, er blitt fyllt med vann og undersøkt med et overtrykk på 5 atm. Some of the tanks that have been serially produced to date have been filled with water and tested with an overpressure of 5 atm.
Den ferdige tank oppviser en rekke fordeler. Dobbeltvegget ut-førelse med overvåket mellomrom, gir stor sikkerhet med hensyn på miljøforurensning. Den har forholdsvis stor statisk styrke sammenlignet med kjente utførelser. Videre kan den framstilles fugeløs, slik at påklebingen av bunnen og mannhull faller faller bort. Den er uømfindlig med hensyn til ville elektriske strømmer og krever minimalt vedlikeholdsarbeide. The finished tank exhibits a number of advantages. Double-walled design with monitored space, provides great security with regard to environmental pollution. It has relatively high static strength compared to known designs. Furthermore, it can be produced without joints, so that the gluing of the bottom and manholes falls away. It is insensitive to wild electrical currents and requires minimal maintenance work.
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH815273A CH551859A (en) | 1973-06-05 | 1973-06-05 | PROCESS FOR MANUFACTURING A SPHAEROID, DOUBLE-WALLED LARGE CONTAINER MADE FROM GLASS FIBER REINFORCED PLASTIC LAMINATE. |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| NO741837L NO741837L (en) | 1974-12-06 |
| NO141925B true NO141925B (en) | 1980-02-25 |
| NO141925C NO141925C (en) | 1980-06-04 |
Family
ID=4335960
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO741837A NO141925C (en) | 1973-06-05 | 1974-05-21 | PROCEDURE FOR MANUFACTURING A SFAEROID, DOUBLE WALL LARGE CONTAINER. |
Country Status (12)
| Country | Link |
|---|---|
| JP (1) | JPS5022877A (en) |
| AT (1) | AT339589B (en) |
| BE (1) | BE815859A (en) |
| CH (1) | CH551859A (en) |
| DE (2) | DE7418687U (en) |
| FR (1) | FR2232443B1 (en) |
| GB (1) | GB1462699A (en) |
| IT (1) | IT1014782B (en) |
| LU (1) | LU70219A1 (en) |
| NL (1) | NL7407158A (en) |
| NO (1) | NO141925C (en) |
| SE (1) | SE405227B (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2558737C3 (en) * | 1975-12-24 | 1984-04-05 | Haase, Harry, 2350 Neumünster | Double-walled underground storage container for liquids that are hazardous to groundwater such as heating oil |
| DE2910173A1 (en) * | 1979-03-15 | 1980-09-25 | Burkhart Dipl Ing Grob | Sandwiches of polyurethane between reinforced polyester outer layers - for coachwork details sprayed in sequence in moulds |
| WO1989002404A1 (en) * | 1987-09-17 | 1989-03-23 | William Rodgers | Improvements in tanks for liquids |
| DE8811913U1 (en) * | 1988-09-20 | 1988-12-15 | Feldbinder & Beckmann Fahrzeugbau Ohg, 21423 Winsen | Tank or silo containers for holding pressurized goods |
| WO1992006905A1 (en) * | 1990-10-12 | 1992-04-30 | Owens-Corning Fiberglas Corporation | Storage tank having secondary containment |
| DE4039231A1 (en) * | 1990-12-08 | 1992-06-11 | Dornier Luftfahrt | Unitary irregular hollow fibre reinforced resin parts prodn. - using flexible positive mould inflated to predetermined shape for lay=up, re-inflated for curing in rigid negative mould for accurate thickness |
| DK0504708T3 (en) * | 1991-03-18 | 1995-11-27 | Parabeam Ind & Handels Bv | Fiber reinforced plastic hollow body |
| US5534318A (en) * | 1991-03-18 | 1996-07-09 | Parabeam Industrie-En Handelsonderneming B.V. | Hollow fiber-reinforced plastic body |
| BE1009553A3 (en) * | 1995-08-25 | 1997-05-06 | Eternit Nv | Double tank. |
| ES2116909B1 (en) * | 1996-04-29 | 1999-07-01 | Recubrimiento Del Poliester S | NEW SURROUND COATING SURFACE, APPLICABLE IN TANKS AND SIMILAR. |
| CN114572575B (en) * | 2022-01-24 | 2024-03-12 | 昆明中天达玻璃钢开发有限公司 | Storage tank processing device and processing method of double-layer storage tank |
-
1973
- 1973-06-05 CH CH815273A patent/CH551859A/en not_active IP Right Cessation
-
1974
- 1974-05-20 AT AT414974A patent/AT339589B/en not_active IP Right Cessation
- 1974-05-21 NO NO741837A patent/NO141925C/en unknown
- 1974-05-27 JP JP49059584A patent/JPS5022877A/ja active Pending
- 1974-05-29 NL NL7407158A patent/NL7407158A/xx not_active Application Discontinuation
- 1974-05-30 DE DE19747418687U patent/DE7418687U/en not_active Expired
- 1974-05-30 DE DE19742426095 patent/DE2426095A1/en not_active Ceased
- 1974-05-30 SE SE7407199A patent/SE405227B/en unknown
- 1974-05-31 FR FR7420227A patent/FR2232443B1/fr not_active Expired
- 1974-06-03 GB GB2443674A patent/GB1462699A/en not_active Expired
- 1974-06-04 BE BE2053660A patent/BE815859A/en unknown
- 1974-06-04 LU LU70219A patent/LU70219A1/xx unknown
- 1974-06-05 IT IT23622/74A patent/IT1014782B/en active
Also Published As
| Publication number | Publication date |
|---|---|
| ATA414974A (en) | 1977-02-15 |
| GB1462699A (en) | 1977-01-26 |
| SE7407199L (en) | 1974-12-06 |
| NO141925C (en) | 1980-06-04 |
| NL7407158A (en) | 1974-12-09 |
| FR2232443B1 (en) | 1978-06-02 |
| AT339589B (en) | 1977-10-25 |
| JPS5022877A (en) | 1975-03-11 |
| DE2426095A1 (en) | 1975-01-02 |
| BE815859A (en) | 1974-09-30 |
| LU70219A1 (en) | 1974-10-17 |
| CH551859A (en) | 1974-07-31 |
| DE7418687U (en) | 1979-10-25 |
| IT1014782B (en) | 1977-04-30 |
| SE405227B (en) | 1978-11-27 |
| FR2232443A1 (en) | 1975-01-03 |
| NO741837L (en) | 1974-12-06 |
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