DE3534274A1 - Method of protecting piping, fittings and the like against bursting as a result of pressure build-up during freezing - Google Patents

Method of protecting piping, fittings and the like against bursting as a result of pressure build-up during freezing

Info

Publication number
DE3534274A1
DE3534274A1 DE19853534274 DE3534274A DE3534274A1 DE 3534274 A1 DE3534274 A1 DE 3534274A1 DE 19853534274 DE19853534274 DE 19853534274 DE 3534274 A DE3534274 A DE 3534274A DE 3534274 A1 DE3534274 A1 DE 3534274A1
Authority
DE
Germany
Prior art keywords
fittings
result
pressure build
against bursting
during freezing
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Withdrawn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
DE19853534274
Other languages
German (de)
Inventor
Guenter Kleinschnittger
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.)
BASF SE
Original Assignee
BASF SE
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 BASF SE filed Critical BASF SE
Priority to DE19853534274 priority Critical patent/DE3534274A1/en
Publication of DE3534274A1 publication Critical patent/DE3534274A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E03WATER SUPPLY; SEWERAGE
    • E03BINSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
    • E03B7/00Water main or service pipe systems
    • E03B7/09Component parts or accessories
    • E03B7/10Devices preventing bursting of pipes by freezing

Abstract

Method of protecting piping, fittings and suchlike processing equipment against bursting as a result of an increase in volume of a freezing medium, for example water, characterised in that the piping interior is partly or completely lined or provided with a compressible material.

Description

Die vorliegende Erfindung betrifft ein Verfahren zur Sicherung von Leitun­ gen, Armaturen u. dgl. verfahrenstechnischen Einrichtungen gegen Bersten infolge Volumenausdehnung eines einfrierenden Mediums, beispielsweise Wasser.The present invention relates to a method for securing lines gen, fittings and. Process engineering devices against bursting due to volume expansion of a freezing medium, for example Water.

In nahezu allen Verfahren wird bei der Behandlung von chemischen oder technischen Produkten Waser benötigt. Es kann niemals ausgeschlossen werden, daß sich Wasser unerwartet an Tiefpunkten verfahrenstechnischer Systeme sammelt, wenn das zu behandelnde Produkt leichter als Wasser ist. Zum Beispiel kann bei einem Wärmetauscher für Produkte aus Kohlenwasser­ stoffen mit einem spez. Gewicht von 0,8 kg/l eine kleine Undichtigkeit an den Kühlwasserrohren eintreten. Durch diese Undichtigkeit gelangen unbe­ merkt Spuren von Wasser in das Produkt. Infolge der Unterschiede in den spez. Gewichten - Wasser mit einem spezifischen Gewicht von 1 kg/l ist schwerer - sammelt sich das Wasser an den Tiefpunkten eines Leitungs­ systems. Ein Probenahmestutzen füllt sich im Laufe der Zeit mit Wasser, wenn aus betrieblichen Gegebenheiten längere Zeit keine Proben genommen werden und daher das Wasser nicht regelmäßig entfernt wird. Bei tiefen Temperaturen kann das im Stutzen befindliche Wasser einfrieren. Dabei kommt es zu einer Volumenzunahme, die zu unzulässigen Spannungen im Rohrleitungs- bzw. Armaturenmaterial führt. Die Rohrleitung/Armatur reißt auf und Produkt wird freigesetzt. Wenn das Produkt brennbar, explosibel oder gesundheitsgefährdend ist, können erhebliche Folgeschäden eintreten.In almost all processes in the treatment of chemical or technical products what was needed. It can never be ruled out become that water unexpectedly procedurally at low points Systems collects when the product to be treated is lighter than water. For example, a heat exchanger for hydrocarbon products fabrics with a special Weight of 0.8 kg / l indicates a small leak enter the cooling water pipes. Due to this leak, notices traces of water in the product. Due to the differences in the spec. Weights - water with a specific weight of 1 kg / l heavier - the water collects at the lowest point of a pipe systems. A sampling port fills with water over time, if no samples have been taken for a long time from operational conditions and therefore the water is not removed regularly. At deep Temperatures can freeze the water in the nozzle. Here there is an increase in volume, which leads to inadmissible tensions in the Pipeline or valve material leads. The pipe / valve breaks on and product is released. If the product is flammable, explosive or is hazardous to health, considerable consequential damage can occur.

Es war daher Aufgabe der vorliegenden Erfindung, ein Verfahren anzugeben, mit dem solche unzulässigen Spannungen im Rohrleitungs-/Armaturenmaterial zuverlässig verhindert werden können.It was therefore an object of the present invention to provide a method with such impermissible tensions in the piping / valve material can be reliably prevented.

Diese Aufgabe wurde erfindungsgemäß dadurch gelöst, daß das Leitungs­ innere mit einem kompressiblen Material ganz oder teilweise ausgekleidet bzw. versehen wird. Insbesondere sind die gefährdeten Bereiche der Rohr­ leitungssysteme mit dem kompressiblen Material auszukleiden, wobei unter Umständen eine einfache Beilage des kompressiblen Materials im Rohrinneren genügt.This object was achieved in that the line Inner part fully or partially lined with a compressible material or is provided. In particular, the hazardous areas are the pipe line systems with the compressible material, whereby under Under certain circumstances, a simple insert of the compressible material inside the pipe enough.

Für die Beilage oder als Auskleidung sind alle Materialien geeignet, die "weich" oder besser stauchfähig, d. h. kompressibel sind. Solche Materia­ lien sind z. B. alle im Handel erhältlichen geschlossenporigen Schäume aus Naturkautschuk, Perbunan, Buna und dgl. All materials are suitable for the side dish or as a lining "soft" or more compressible, d. H. are compressible. Such materia lien are z. B. from all commercially available closed-cell foams Natural rubber, Perbunan, Buna and the like  

Eine Ausführungsform des erfindungsgemäßen Verfahrens ist in der Zeich­ nung (Fig. 1a, 1b) dargestellt.An embodiment of the method according to the invention is shown in the drawing ( Fig. 1a, 1b).

Ein Rohr mit einer Wandstärke S 1 kann mit diesen stauchfähigen Materia­ lien ausgekleidet werden. Die Stärke der Auskleidung betrage S 2. Im Rohr habe sich Wasser angesammelt, das bei Temperaturen unter 0°C friert. Die Volumenausdehnung des Eises führt dann zu einer Kompression des Ausklei­ dungsmaterials von S 2 nach S′ 2. Die Volumenabnahme der Auskleidung ent­ spricht der Volumenzunahme des Eises. Wegen der elastischen Eigenschaften der Auskleidung tritt dabei nur eine geringe Druckerhöhung auf, die nicht zu unzulässigen Spannungen im Rohrmaterial führt (S 1 = S′ 1).A tube with a wall thickness S 1 can be lined with these compressible materials. The thickness of the lining is S 2 . Water has collected in the pipe and freezes at temperatures below 0 ° C. The volume expansion of the ice then leads to a compression of the lining material from S 2 to S ′ 2 . The decrease in volume of the lining corresponds to the increase in volume of the ice. Because of the elastic properties of the lining, there is only a slight increase in pressure, which does not lead to inadmissible stresses in the pipe material (S 1 = S ′ 1 ).

Beispielexample

Ein Rohr DN 25 PN 40 wurde durch Anschweißen einer Stahlplatte geschlos­ sen. In das Rohr wurden 2 Moosgummistreifen 5 × 20 ×200 mm eingelegt.A pipe DN 25 PN 40 was closed by welding a steel plate sen. Two sponge rubber strips 5 × 20 × 200 mm were inserted into the tube.

Danach wurde das andere Ende des Rohres durch Verschrauben eines Blind­ deckels mit einigen an das Rohr angeschweißten Vorschweißflansch ver­ schlossen. Über eine verschraubbare Öffnung konnte das Rohr mit Wasser gefüllt werden.After that, the other end of the tube was screwed down by a blind cover with some welded flange welded to the pipe closed. The pipe could be filled with water through a screwable opening be filled.

Das Rohr wurde mit Leitungswasser gefüllt, danach verschlossen und für 24 Stunden in eine Kühltruhe mit einer Temperatur von -18°C verbracht.The pipe was filled with tap water, then closed and for Spent 24 hours in a freezer with a temperature of -18 ° C.

Der Vorgang wurde 3 × wiederholt, ohne die Moosgummieinlage zu wechseln. Vor und nach dem Einlagern wurde der Rohrdurchmesser gemessen.The process was repeated 3 times without changing the foam rubber insert. The tube diameter was measured before and after storage.

Dabei konnten keine Änderungen des Rohrdurchmessers festgestellt werden.No changes in the pipe diameter could be determined.

Spannungen, die zu einer Verformung geführt hätten, sind nicht aufgetre­ ten, weil die Volumenausdehnung des Eises vom beigelegten Moosgummi elastisch aufgenommen worden ist.Stresses that would have caused deformation have not occurred ten, because the volume expansion of the ice from the included foam rubber has been absorbed elastically.

Claims (1)

Verfahren zur Sicherung von Leitungen, Armaturen u. dgl. verfahrenstech­ nischen Einrichtungen gegen Bersten infolge Volumenausdehnung eines einfrierenden Mediums, beispielsweise Wasser, dadurch gekennzeichnet, daß das Leitungsinnere mit einem kompressiblen Material ganz oder teilweise ausgekleidet bzw. versehen wird.Process for securing lines, fittings and. Process engineering facilities against bursting due to volume expansion of a freezing medium, for example water, characterized in that the interior of the line is completely or partially lined or provided with a compressible material.
DE19853534274 1985-09-26 1985-09-26 Method of protecting piping, fittings and the like against bursting as a result of pressure build-up during freezing Withdrawn DE3534274A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19853534274 DE3534274A1 (en) 1985-09-26 1985-09-26 Method of protecting piping, fittings and the like against bursting as a result of pressure build-up during freezing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19853534274 DE3534274A1 (en) 1985-09-26 1985-09-26 Method of protecting piping, fittings and the like against bursting as a result of pressure build-up during freezing

Publications (1)

Publication Number Publication Date
DE3534274A1 true DE3534274A1 (en) 1987-04-02

Family

ID=6281964

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19853534274 Withdrawn DE3534274A1 (en) 1985-09-26 1985-09-26 Method of protecting piping, fittings and the like against bursting as a result of pressure build-up during freezing

Country Status (1)

Country Link
DE (1) DE3534274A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10035809A1 (en) * 2000-07-22 2002-01-31 Mann & Hummel Filter Method for de=icing fluid duct has an elastic insert with trapped spaces connected to a variable pressure supply
WO2015139758A1 (en) * 2014-03-20 2015-09-24 Husqvarna Ab Modular water application device with different protector configurations and corresponding method
WO2015139757A1 (en) * 2014-03-20 2015-09-24 Husqvarna Ab Water application device with critical area protectors
WO2015139759A1 (en) * 2014-03-20 2015-09-24 Husqvarna Ab Frost compensator for a water application device

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10035809A1 (en) * 2000-07-22 2002-01-31 Mann & Hummel Filter Method for de=icing fluid duct has an elastic insert with trapped spaces connected to a variable pressure supply
DE10035809B4 (en) * 2000-07-22 2010-05-12 Mann + Hummel Gmbh Device for de-icing a flow cross-section
WO2015139758A1 (en) * 2014-03-20 2015-09-24 Husqvarna Ab Modular water application device with different protector configurations and corresponding method
WO2015139757A1 (en) * 2014-03-20 2015-09-24 Husqvarna Ab Water application device with critical area protectors
WO2015139759A1 (en) * 2014-03-20 2015-09-24 Husqvarna Ab Frost compensator for a water application device
CN106103855A (en) * 2014-03-20 2016-11-09 富世华股份有限公司 Frost compensator for sprinkler
CN106102929A (en) * 2014-03-20 2016-11-09 富世华股份有限公司 Sprinkler with critical area protection
TWI641424B (en) * 2014-03-20 2018-11-21 瑞典商富世華股份有限公司 Water application device with critical area protectors

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Legal Events

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8141 Disposal/no request for examination