DE858615C - Multi-layer pipe for high pressures at high temperatures - Google Patents
Multi-layer pipe for high pressures at high temperaturesInfo
- Publication number
- DE858615C DE858615C DEW4557A DEW0004557A DE858615C DE 858615 C DE858615 C DE 858615C DE W4557 A DEW4557 A DE W4557A DE W0004557 A DEW0004557 A DE W0004557A DE 858615 C DE858615 C DE 858615C
- Authority
- DE
- Germany
- Prior art keywords
- layer pipe
- high temperatures
- pressures
- high pressures
- layers
- 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
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/02—Rigid pipes of metal
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Description
Die neuzeitliche Verfahrenstechnik benötigt dringend Rohre, Behälter oder ähnliche Hohlkörper, die höchste Drücke bei erhöhten Temperaturen aufnehmen können. Dieser Forderung konnte bisher nur so weit entsprochen werden, wie die verfügbaren Stähle mit optimalen Warmfestigkeitseigenschaften noch Wanddicken ergaben, die herstellbar waren und trotz der großen Wanddicken eine noch ausreichende Sicherheit erwarten ließen. Zusätzliche Maßnahmen durch z. B. Bandagieren, Aufschrumpfen, Autofrettage u. ä. vergrößerten den Beanspruchungsbereich.Modern process engineering urgently needs pipes and containers or similar hollow bodies that absorb the highest pressures at elevated temperatures can. So far, this requirement could only be met as far as the available ones Steels with optimal heat resistance properties still resulted in wall thicknesses that could be manufactured and expect sufficient security despite the great wall thickness let. Additional measures by z. B. bandaging, shrinking, autofrettage and the like increased the stress area.
Gemäß der Erfindung sind Stahlrohre, die für hohe Drücke bei hohen Temperaturen bestimmt sind, besonders geeignet, wenn sie aus zwei oder mehreren Lagen von Stählen bestehen, die von innen nach außen einen abnehmenden Wärmeausdehnungskoeffizienten besitzen. Durch entsprechende Bemessung der Stärke dieser Lagen wird erreicht, daß die innere Lage oder die inneren Lagen mit zunehmender Temperatur eine erhebliche Druckspannung erhalten, und zwar dadurch, daß die Außenlage oder die äußeren Lagen mit niedrigem Ausdehnungskoeffizienten eine automatische und mit der Temperatur zunehmende Bandagenwirkung ausüben. Infolgedessen kann das Rohr an der höchst beanspruchten Innenfaser um soviel höhere Spannungen ertragen, wie der gekennzeichneten Vorspannung entspricht. Wenngleich es ohne grundsätzliche Bedeutung ist, wie die Plattierung der Rohre vorgenommen wurde, z. B. passend Ineinanderschieben, Aufeinanderziehen, Löten, Plattieren, ist dem Schweißplattieren der Vorzug zu geben.According to the invention, steel pipes are designed for high pressures at high Temperatures are determined, especially when they are made up of two or more Layers of steels consist of a decreasing coefficient of thermal expansion from the inside out own. By appropriately dimensioning the thickness of these layers it is achieved that the inner layer or layers increase significantly with increasing temperature Preserved compressive stress by the fact that the outer layer or the outer layers with low coefficient of expansion an automatic and with temperature exert increasing bandage effect. As a result, the pipe can be extremely stressed Inner fibers can withstand much higher tensions than the marked pre-tension is equivalent to. Although it is of no fundamental importance, like the plating the pipes was made, e.g. B. fitting into one another, pulling apart, Soldering, cladding, weld cladding is preferred.
Als Ausführungsbeispiel wird ein schweißplattiertes Doppelrohr genannt, dessen äußerer Mantel drei Fünftel der Gesamtwanddicke aus einem Cr-MO-Stahl mit einem Ausdehnungskoeffizienten von 13,9 X io-6 und dessen Innenrohr mit zwei Fünftel der Wanddicke aus austenitischen Cr-Ni-Stahl mit einem Ausdehnungskoeffizienten von 18 X io-6 zwischen 2o und 5oo°@ C besteht.A weld-clad double pipe is mentioned as an exemplary embodiment, the outer jacket of which is three fifths of the total wall thickness made of a Cr-MO steel a coefficient of expansion of 13.9 X io-6 and its inner tube with two fifths the wall thickness of austenitic Cr-Ni steel with an expansion coefficient of 18 X io-6 between 2o and 5oo ° @ C.
In der Zeichnung ist ein Rohr gemäß der Erfindung im Querschnitt dargestellt, das aus dem Außenrohr i und dem Innenrohr 2 besteht.In the drawing, a pipe according to the invention is shown in cross section, which consists of the outer tube i and the inner tube 2.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEW4557A DE858615C (en) | 1950-11-17 | 1950-11-17 | Multi-layer pipe for high pressures at high temperatures |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEW4557A DE858615C (en) | 1950-11-17 | 1950-11-17 | Multi-layer pipe for high pressures at high temperatures |
Publications (1)
Publication Number | Publication Date |
---|---|
DE858615C true DE858615C (en) | 1952-12-08 |
Family
ID=7592353
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEW4557A Expired DE858615C (en) | 1950-11-17 | 1950-11-17 | Multi-layer pipe for high pressures at high temperatures |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE858615C (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1099284B (en) * | 1958-08-04 | 1961-02-09 | Mannesmann Ag | Thin-walled tube with a small diameter, especially for reactor construction |
DE1110962B (en) * | 1955-09-29 | 1961-07-13 | Phoenix Rheinrohr Ag | Hollow winding body with thin-walled core tube |
FR2059714A1 (en) * | 1969-08-28 | 1971-06-04 | Maschf Augsburg Nuernberg Ag | |
FR2517578A1 (en) * | 1981-12-08 | 1983-06-10 | Esser Werke Gmbh | METHOD FOR MANUFACTURING A DOUBLE WALL TUBE FOR TRANSPORTING SOLID MATERIALS, AND TUBE OBTAINED BY THIS PROCESS |
US5892887A (en) * | 1997-07-17 | 1999-04-06 | Venturi Technologies, Inc. | Electric water heater with a pair of interconnected heating chambers having concentric copper tube structures |
-
1950
- 1950-11-17 DE DEW4557A patent/DE858615C/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1110962B (en) * | 1955-09-29 | 1961-07-13 | Phoenix Rheinrohr Ag | Hollow winding body with thin-walled core tube |
DE1099284B (en) * | 1958-08-04 | 1961-02-09 | Mannesmann Ag | Thin-walled tube with a small diameter, especially for reactor construction |
FR2059714A1 (en) * | 1969-08-28 | 1971-06-04 | Maschf Augsburg Nuernberg Ag | |
FR2517578A1 (en) * | 1981-12-08 | 1983-06-10 | Esser Werke Gmbh | METHOD FOR MANUFACTURING A DOUBLE WALL TUBE FOR TRANSPORTING SOLID MATERIALS, AND TUBE OBTAINED BY THIS PROCESS |
US5892887A (en) * | 1997-07-17 | 1999-04-06 | Venturi Technologies, Inc. | Electric water heater with a pair of interconnected heating chambers having concentric copper tube structures |
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