DE1237963B - Formation of a welded double-walled ball container - Google Patents

Formation of a welded double-walled ball container

Info

Publication number
DE1237963B
DE1237963B DE1961M0051101 DEM0051101A DE1237963B DE 1237963 B DE1237963 B DE 1237963B DE 1961M0051101 DE1961M0051101 DE 1961M0051101 DE M0051101 A DEM0051101 A DE M0051101A DE 1237963 B DE1237963 B DE 1237963B
Authority
DE
Germany
Prior art keywords
ball
formation
walled
welded
double
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.)
Pending
Application number
DE1961M0051101
Other languages
German (de)
Inventor
Dipl-Ing Heinz Elstner
Edgar Rehm
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.)
ZWEIGNIEDERLASSUNG NUERNBERG
MAN AG
Original Assignee
ZWEIGNIEDERLASSUNG NUERNBERG
MAN Maschinenfabrik Augsburg Nuernberg AG
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 ZWEIGNIEDERLASSUNG NUERNBERG, MAN Maschinenfabrik Augsburg Nuernberg AG filed Critical ZWEIGNIEDERLASSUNG NUERNBERG
Priority to DE1961M0051101 priority Critical patent/DE1237963B/en
Publication of DE1237963B publication Critical patent/DE1237963B/en
Pending legal-status Critical Current

Links

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
    • 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
    • F17C2201/0128—Shape spherical or elliptical
    • 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
    • F17C2201/03—Orientation
    • F17C2201/032—Orientation with substantially vertical main axis
    • 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
    • F17C2201/05—Size
    • F17C2201/054—Size medium (>1 m3)
    • 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
    • F17C2203/014—Suspension means
    • 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
    • F17C2203/0612—Wall structures
    • F17C2203/0626—Multiple walls
    • F17C2203/0629—Two walls
    • 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
    • F17C2203/0639—Steels
    • 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
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/01—Mounting arrangements
    • F17C2205/0153—Details of mounting arrangements
    • F17C2205/018—Supporting feet
    • 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
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0379—Manholes or access openings for human beings
    • 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
    • F17C2209/00—Vessel construction, in particular methods of manufacturing
    • F17C2209/22—Assembling processes
    • F17C2209/221—Welding
    • 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
    • F17C2209/00—Vessel construction, in particular methods of manufacturing
    • F17C2209/23—Manufacturing of particular parts or at special locations
    • F17C2209/232—Manufacturing of particular parts or at special locations of walls
    • 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
    • F17C2223/0107—Single phase
    • F17C2223/0123—Single phase gaseous, e.g. CNG, GNC
    • 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
    • F17C2223/035—High pressure (>10 bar)
    • 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
    • F17C2260/00—Purposes of gas storage and gas handling
    • F17C2260/01—Improving mechanical properties or manufacturing
    • F17C2260/013—Reducing manufacturing time or effort

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)

Description

Ausbildung eines geschweißten doppelwandigen Kugelbehälters Kugelbehälter für Gase und Flüssigkeiten werden für normale Drücke in der Regel einwandig ausgeführt. Für höhere Drücke, z. B. 50 atü und mehr, ist es jedoch vorteilhaft, den Kugelbehälter doppelwandig auszubilden, da dadurch die Wandstärke jeder Kugel in den Grenzen gehalten werden kann, die ein Glühen der Kugelbleche nicht erfordern. Weitere Vorteile der doppelwandigen Ausführung eines geschweißten Kugelbehälters sind folgende: Bei größerer Wandstärke der Bleche läßt sich eine Tulpennaht nicht anbringen, da die gepreßten Blechschalen eine solche Nahtform nicht mit der erforderlicher- Genauigkeit herstellen lassen. Es kommt dann nur ein durch Brennschneiden hergestellter Schweißquerschnitt mit geraden Nahtflanken in Frage, der ein zwei- bis vierfaches Schweißvolumen benötigt. Für die innere Kugel kann ein teureres Material, z. B. austhenitischer Stahl, verwendet werden, das dem Angriff des Füllmediums besser widersteht. Auch kann bei hohen Temperaturen ein hochwarmfester Stahl für die innere Kugel gewählt werden. Die Streckgrenze sinkt mit der Stärke des Bleches, infolgedessen ist bei zwei Blechen verhältnismäßig geringere Stärke erforderlich. Das Materialgefüge ist bei dicken Blechen ungünstiger. Wird aber ein geschweißter Kugelbehälter doppelwandig ausgeführt, dann treten bei der Herstellung der in waagerechten Ebenen liegenden Schweißnähte der äußeren Kugel Schwierigkeiten auf, da die Innenseite dieser Schweißnähte bei Vorhandensein der inneren Kugel nicht zugänglich ist.Formation of a welded double-walled spherical container for gases and liquids are usually single-walled for normal pressures. For higher pressures, e.g. B. 50 atmospheres and more, however, it is advantageous to use the ball container double-walled, as this keeps the wall thickness of each ball within limits that do not require annealing of the spherical sheets. Other advantages of the double-walled design of a welded spherical container are as follows: For larger A tulip seam cannot be attached to the wall thickness of the sheet metal because it is pressed Sheet metal shells do not produce such a seam shape with the required accuracy permit. Then there is only a welding cross-section produced by flame cutting with straight seam flanks that require two to four times the welding volume. For the inner ball, a more expensive material, e.g. B. austenitic steel is used that is better able to withstand the attack of the filling medium. Can also be used at high temperatures a high-temperature steel can be selected for the inner ball. The yield point drops with the thickness of the sheet, as a result, with two sheets is relatively lower Strength required. The material structure is less favorable with thick sheets. Will but a welded spherical container made double-walled, then occur at the Production of the weld seams of the outer sphere lying in horizontal planes Difficulties arise because the inside of these welds in the presence of the inner sphere is not accessible.

Die Ausbildung eines geschweißten doppelwandigen Kugelbehälters nach der Erfindung vermeidet diese Schwierigkeiten. Die Erfindung besteht darin, daß die innere Kugel unten auf der äußeren Kugel um die vertikale Achse drehbar gelagert und in der Nähe der waagerechten Schweißnaht- bzw. Schweißnähte-Ebenen mit je einer etwa mannlochgroßen verschließbaren Öffnung versehen ist. Durch die drehbare Lagerung der inneren Kugel in Verbindung mit den in ihr vorgesehenen Öffnungen ist es mit einfachen Mitteln möglich, die Innenseite der in den waagerechten Ebenen liegenden Schweißnähte der äußeren Kugel zugänglich zu machen. Die fertiggestellten Schweißnähte können in derselben Weise durch Röntgenstrahlen geprüft werden. Um das Drehen der inneren Kugel zu erleichtern, ist es zweckmäßig, den Zwischenraum zwischen den beiden Kugeln während der Schweißarbeit oder der Prüfung zu etwa einem Drittel mit Wasser zu füllen. Für den Schweißer oder den Prüfer kann innerhalb der inneren Kugel ein Gerüst od. ä. angebracht werden. In der Zeichnung ist ein Ausführungsbeispiel der Erfindung in einem vertikalen Mittelschnitt durch den doppelwandigen Kugelbehälter schematisch dargestellt.The formation of a welded double-walled spherical container according to the invention avoids these difficulties. The invention consists in that the inner ball is rotatably mounted on the outer ball around the vertical axis and in the vicinity of the horizontal weld seam or weld seam planes with one each approximately manhole-sized closable opening is provided. Due to the rotatable bearing it is with the inner ball in connection with the openings provided in it simple means possible, the inside of the lying in the horizontal planes To make welds of the outer ball accessible. The finished welds can be examined by X-rays in the same way. To turn the To facilitate inner ball, it is convenient to keep the space between the two About one third of the balls with water during the welding work or the test to fill. For the welder or the inspector, one can inside the inner sphere Scaffolding or the like. In the drawing is an embodiment of the Invention in a vertical center section through the double-walled spherical container shown schematically.

Der doppelwandige Kugelbehälter ist durch eine Stahlkonstruktion 1 unterstützt, die ihrerseits auf einem Betonfundament 2 befestigt ist. Die äußere Kugel des Behälters ist mit 3 und die innere Kugel mit 4 bezeichnet. Beide Kugeln sind oben je mit einer durch einen Deckel s bzw. 6 verschließbaren Öffnung 7 bzw. 8 versehen. Die Füllung und Entleerung des Behälters erfolge durch besondere nicht dargestellte Leitungen.The double-walled spherical container is made of steel 1 supported, which in turn is attached to a concrete foundation 2. The outer The ball of the container is denoted by 3 and the inner ball is denoted by 4. Both balls are at the top each with an opening 7 or 8 provided. The filling and emptying of the container does not take place through special lines shown.

Gemäß der Erfindung ist die innere Kugel 4 unten auf der äußeren Kugel 3 um die vertikale Achse drehbar gelagert. Zur Lagerung dient ein einfach ausgeführtes, aus einem Käfig 9 mit Kugeln 10 bestehendes Kugellager 9, 10. Weiter ist die innere Kugel 4 in der Nähe der waagerechten Mittelebene mit einer etwa mannlochgroßen, durch einen Deckel 11 verschließbaren Öffnung 12 versehen.According to the invention, the inner ball 4 is rotatably mounted on the outer ball 3 about the vertical axis at the bottom. A simple ball bearing 9, 10 consisting of a cage 9 with balls 10 is used for storage. Furthermore, the inner ball 4 is provided in the vicinity of the horizontal center plane with an opening 12, about the size of a manhole, which can be closed by a cover 11.

Das Zusammenschweißen der Bleche des Kugelbehälters erfolgt bis zur Herstellung der in der waagerechten Mittelebene liegenden Schweißnaht 13 der äußeren Kugel 3 in bekannter Weise. Die Innenseite der Naht 13 wird, nachdem sie von außen geheftet wurde, durch die Öffnung 12 in der inneren Kugel 4 geschweißt. Hierzu wird für den Schweißer in der inneren Kugel ein Gerüst (nicht dargestellt) montiert. Während der Schweißarbeit wird die innere Kugel 4 gedreht. Das kann durch einen an der inneren Kugel angreifenden, durch die Öffnungen 7 und $ bei geöffneten Deckeln 5, 6 geführten Antrieb erfolgen. Es kann aber auch der Schweißer selbst die innere Kugel 4 absatzweise drehen, indem er mittels einer Stange od. dgl. durch die Öffnung 12 gegen die Innenseite der äußeren Kugel 3 drückt. Um das Drehen der inneren Kugel 4 zu erleichtern, kann es zweckmäßig sein, den Zwischenraum 14 zwischen beiden Kugeln zu etwa einem Drittel mit Wasser oder einer sonstigen geeigneten Flüssigkeit zu füllen. Hierdurch erhält die innere Kugel einen Auftrieb.The metal sheets of the spherical container are welded together in a known manner until the weld seam 13 of the outer sphere 3 located in the horizontal central plane is produced. The inside of the seam 13, after it has been tacked from the outside, is welded through the opening 12 in the inner ball 4. For this purpose, a frame (not shown) is mounted for the welder in the inner sphere. The inner ball 4 is rotated during the welding work. This can be done by a drive engaging the inner ball and guided through the openings 7 and $ when the lids 5, 6 are open. However, the welder himself can also rotate the inner ball 4 intermittently by pressing a rod or the like through the opening 12 against the inside of the outer ball 3. In order to facilitate the turning of the inner ball 4, it can be expedient to fill the space 14 between the two balls to about one third with water or another suitable liquid. This gives the inner ball a lift.

Nach Beendigung der Schweißarbeiten kann in derselben Weise von der inneren Kugel 4 aus eine Prüfung der Schweißnaht 13 durch Röntgenstrahlen erfolgen. Das Wasser in dem Zwischenraum 14 wird dann wieder abgelassen, die Öffnung 12 durch den Deckel 11 druckdicht verschlossen und das Gerüst im Inneren der Kugel 4 abmontiert. Das Kugellager 9,10 kann in dem Behälter bleiben, da es nicht hochwertig zu sein braucht und als Abstandshafter der beiden Kugeln 3, 4 dienen kann. Es können auch mehrere verschließbare Öffnungen 12 in einer waagerechten Ebene vorgesehen werden, so daß mehrere Schweißer gleichzeitig arbeiten können.After completion of the welding work, an examination of the weld seam 13 by means of X-rays can be carried out in the same way from the inner ball 4. The water in the intermediate space 14 is then drained off again, the opening 12 is closed in a pressure-tight manner by the cover 11 and the frame inside the ball 4 is dismantled. The ball bearing 9, 10 can remain in the container, since it does not need to be of high quality and can serve as a spacer for the two balls 3, 4. Several closable openings 12 can also be provided in a horizontal plane so that several welders can work at the same time.

Nach dem erfindungsgemäßen Verfahren können auch mehrwandige Kugelbehälter geschweißt werden.According to the method according to the invention, multi-walled spherical containers can also be used be welded.

Claims (1)

Patentanspruch: Ausbildung eines geschweißten doppelwandigen Kugelbehälters, d a d u r c h g e k e n n -z e i c h n e t, daß die innere Kugel (4) unten auf der äußeren Kugel (3) um die vertikale Achse drehbar gelagert und in der Nähe der waagerechten Schweißnaht bzw. Schweißnähte der äußeren Kugel (3) mit je einer etwa mannlochgroßen verschließbaren Öffnung (12) versehen ist. In Betracht gezogene Druckschriften: Deutsche Patentschrift Nr. 932 945; schweizerische Patentschrift Nr. 158 0I0.Claim: Formation of a welded double-walled spherical container, characterized in that the inner ball (4) is rotatably mounted on the outer ball (3) around the vertical axis and in the vicinity of the horizontal weld seam or weld seams of the outer ball (3) each has an approximately manhole-sized closable opening (12) . Documents considered: German Patent No. 932 945; Swiss patent specification No. 158 0I0.
DE1961M0051101 1961-12-07 1961-12-07 Formation of a welded double-walled ball container Pending DE1237963B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE1961M0051101 DE1237963B (en) 1961-12-07 1961-12-07 Formation of a welded double-walled ball container

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1961M0051101 DE1237963B (en) 1961-12-07 1961-12-07 Formation of a welded double-walled ball container

Publications (1)

Publication Number Publication Date
DE1237963B true DE1237963B (en) 1967-04-06

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Family Applications (1)

Application Number Title Priority Date Filing Date
DE1961M0051101 Pending DE1237963B (en) 1961-12-07 1961-12-07 Formation of a welded double-walled ball container

Country Status (1)

Country Link
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015153631A1 (en) * 2014-04-01 2015-10-08 Trinity Cryogenics, Llc Dual pressure-retaining manway system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH158010A (en) * 1931-08-21 1932-10-31 Sulzer Ag Process for connecting pipe ends by means of welding.
DE932945C (en) * 1953-04-28 1955-09-12 Aug Kloenne Fa Device for turning spherical containers to be welded together from individual sheets

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH158010A (en) * 1931-08-21 1932-10-31 Sulzer Ag Process for connecting pipe ends by means of welding.
DE932945C (en) * 1953-04-28 1955-09-12 Aug Kloenne Fa Device for turning spherical containers to be welded together from individual sheets

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015153631A1 (en) * 2014-04-01 2015-10-08 Trinity Cryogenics, Llc Dual pressure-retaining manway system

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