DE572506C - Process for covering pipes, in particular centrifugally cast pipes, with bituminous substances - Google Patents

Process for covering pipes, in particular centrifugally cast pipes, with bituminous substances

Info

Publication number
DE572506C
DE572506C DEV27071D DEV0027071D DE572506C DE 572506 C DE572506 C DE 572506C DE V27071 D DEV27071 D DE V27071D DE V0027071 D DEV0027071 D DE V0027071D DE 572506 C DE572506 C DE 572506C
Authority
DE
Germany
Prior art keywords
pipes
bituminous substances
centrifugally cast
covering
coating
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
DEV27071D
Other languages
German (de)
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.)
Vereinigte Stahlwerke AG
Original Assignee
Vereinigte Stahlwerke 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 Vereinigte Stahlwerke AG filed Critical Vereinigte Stahlwerke AG
Priority to DEV27071D priority Critical patent/DE572506C/en
Application granted granted Critical
Publication of DE572506C publication Critical patent/DE572506C/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
    • B05D7/146—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies to metallic pipes or tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
    • B05D3/0218—Pretreatment, e.g. heating the substrate

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)

Description

Verfahren zum Überziehen von Rohren, insbesondere Schleudergußrohren, mit bituminösen Stoffen Es ist bekannt, daß die gleichmäßige Erwärmung von eisernen Gegenständen mit großen Schwierigkeiten verbunden, aber für das Haften und die gleichmäßige Dicke von bituminösen Überzugsstoffen von größter Wichtigkeit ist. Man hat daher vorgeschlagen;; die Stücke, z. B. Rohre, vor dem Überziehen vollständig in ein heißes Bad einer Klebmasse, z. B. Pechklebmasse, einzutauchen und dann erst den eigentlichen Überzug aus Teer oder einer sonstigen Rostschutzmasse in heißem Zustande durch Schleudern oder Aufspritzen mittels einer Spritzvorrichtung aufzubringen. Nach diesem Vorschlage ist aber ein wirtschaftliches Arbeiten nicht möglich, weil zu geringe Leistungen erzielt werden und sehr hohe Kosten entstehen durch die zeitraubende Erwärmung der Rohre in der Klebmasse.Process for coating pipes, in particular centrifugally cast pipes, with bituminous substances It is known that the uniform heating of iron Objects associated with great difficulty, but for adherence and uniformity The thickness of bituminous coatings is of the utmost importance. One therefore has suggested ;; the pieces, e.g. B. Pipes, completely in a hot before coating Bath of an adhesive, e.g. B. pitch glue to dip and only then the actual Coating of tar or some other anti-rust compound in a hot state by centrifuging or to be applied by spraying by means of a spraying device. According to this suggestion but it is not possible to work economically because the performance is too low can be achieved and very high costs arise from the time-consuming heating of the Pipes in the adhesive.

Nach der Erfindung lassen sich dagegen Rohre einfach und billig in üblicher Weise erhitzen und überziehen, wobei eine gleichmäßige Erwärmung derselben dadurch erzielt wird, daß die Rohre nach dem Erhitzen, aber vor dem Aufbringen der überzugsmasse temperiert werden, z. B. durch Eintauchen in ein Wasser- oder Metallbad mit geringem Schmelzpunkt (Blei-Wismut-, Legierung). Das Metall kann bekanntlich nur an Rohren haften, die metallisch blank sind.According to the invention, however, pipes can be easily and cheaply in Usually heat and coat, with an even heating of the same is achieved in that the tubes after heating, but before the application of the coating mass are tempered, for. B. by immersion in a water or metal bath with low melting point (lead-bismuth, alloy). As is well known, the metal can only adhere to pipes that are bare metal.

Die Erfindung paßt für alle Arten der Erhitzung der Rohre und alle Herstellungsarten von Rohren, eignet sich aber besonders für Schleudergußrohre, weil diese in Massen hergestellt werden und von ihrer Verarbeitung her bei Kokillenguß in der Regel noch so erhebliche Wärme mitbringen, daß für das Warmhalten des Bades keine besondere Wärmezufuhr nötig ist.The invention is suitable for all types of heating of the tubes and all Types of production of pipes, but is particularly suitable for centrifugally cast pipes, because these are mass-produced and the way they are processed in permanent mold casting usually bring enough heat with you to keep the bath warm no special heat supply is necessary.

Das Bad entzieht z. B. der Muffe, die größere Wärmemengen- enthält, weil sie größere Masse besitzt, mehr Wärme und gleicht somit die Temperaturen von Schaft und Muffe aus.The bath removes z. B. the sleeve that contains larger amounts of heat, because it has greater mass, more heat and thus equals the temperatures of Shaft and sleeve made.

Mit Bitumen sind schmelzbare Stoffe harzigen Aussehens gemeint, wie sie natürlich vorkommen oder aus kohligen oder öligen Substanzen gewonnen werden, z. B. Teer, Asphalt, Pech u. dgl., und zum Überziehen von Gußeisen im erwärmten Zustande üblich sind.Bitumen means fusible substances with a resinous appearance, such as they occur naturally or are obtained from carbonaceous or oily substances, z. B. tar, asphalt, pitch and the like., And for coating cast iron in the heated Conditions are common.

Claims (1)

PATENTANSPRUCH: Verfahren zum Überziehen von Rohren, insbesondere Schleudergußrohren, die z. B. an den Muffen eine größere Wandstärke als in der Mitte haben, mit bituminöser Stoffen, dadurch gekennzeichnet, daß die Rohre zunächst erhitzt und nach dem Erhitzen, aber vor dem Überziehen zwecks Ausgleichs etwa vorhandener Temperaturunterschiede auf Temperaturausgleich behandelt, d. h. z. B. in ein Wasserbad oder ein Metallbad von geeignet niedrigem Schmelzpunkt getaucht werden.PATENT CLAIM: Process for coating pipes, in particular Centrifugal cast pipes z. B. at the sleeves a greater wall thickness than in the middle have, with bituminous substances, characterized in that the pipes are first heated and after heating, but before coating, to compensate for any Treated temperature differences for temperature equalization, d. H. z. B. in a water bath or immersed in a metal bath of suitably low melting point.
DEV27071D 1931-07-14 1931-07-14 Process for covering pipes, in particular centrifugally cast pipes, with bituminous substances Expired DE572506C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEV27071D DE572506C (en) 1931-07-14 1931-07-14 Process for covering pipes, in particular centrifugally cast pipes, with bituminous substances

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEV27071D DE572506C (en) 1931-07-14 1931-07-14 Process for covering pipes, in particular centrifugally cast pipes, with bituminous substances

Publications (1)

Publication Number Publication Date
DE572506C true DE572506C (en) 1933-03-17

Family

ID=7583128

Family Applications (1)

Application Number Title Priority Date Filing Date
DEV27071D Expired DE572506C (en) 1931-07-14 1931-07-14 Process for covering pipes, in particular centrifugally cast pipes, with bituminous substances

Country Status (1)

Country Link
DE (1) DE572506C (en)

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