Abstract:
Es wird ein Verfahren zur Herstellung einer Kraftstoffspeicherleitung (1) und eine Kraftstoffspeicherleitung (1) mit vorgespannten Anschlussstücken (2) beschrieben. Die Anschlussstücke (2) werden entweder aufgequetscht oder durch eine zeitliche Aufweitung und/oder eine zeitliche Schrumpfung der Kraftstoffspeicherleitung (1) mit einer Vorspannung auf die Kraftstoffspeicherleitung (1) aufgebracht. Die Anschlussstücke (2) dienen zum Anschluss einer Leitung an die Kraftstoffspeicherleitung (1). Durch die Vorspannung der Anschlussstücke (2) wird ein Druck auf die Kraftstoffspeicherleitung (1) ausgeübt, die zu einer Erhöhung der Druckfestigkeit führt.
Abstract:
A steel liner (a pipe or vessel) is wrapped with a stack of sheets of glass fiber-reinforced epoxy matrix composite arranged in angle ply pattern. The stack is cured on the liner to bond the sheets together and to the liner. The wrapped liner is then internally pressurized to cause the liner to yield while the composite remains elastic. When de-pressurized, the liner has compressive residual stress and the composite has tensile residual stress. When the resulting hybrid structure is subsequently again pressurized, it is found that the elastic regime of the liner has been extended.
Abstract:
A braided hose reinforcement (14) comprises left and right turning strips (20, 22). Each of said strips comprises a number of steel wires. The steel wires (24) located at the side regions of the strips have a tensile strength which is substantially lower than the tensile strength of the steel wires of the central region.
Abstract:
Opening and closing element for an S-shaped fluid flow line, used for flowing any fluid or solid (powdery, granular) material and adaptable to any form of package or installation containing fluids, characterized in that its shape consisting of two S elbows enables to stop instantaneously the flow of fluids and to stop instantaneously the flow of fluids and this, by manual or mechanical traction, as a function of the position given to said element; the S-shape provides a very efficient tightness without the use of additional elements.
Abstract:
Method comprising the winding about a hollow body (1), according to substantially jointed turns, a flexible profiled section (2) which is fixed on said hollow body. In said method, use is made of a profiled section (1) of a material of which the yield strength is higher than that of the material of the hollow body (1) and the profiled section is wound about the hollow body with a sufficient tension so that, when the hollow body (1) is under pressure, the stresses susceptible to develop in the body and in the windings of the profiled section (2) reach their admissible maximum substantially at the same time. Utilization to reinforce pipes or containers intended to be under pressure.
Abstract:
Pressure cast lined steel pipes comprise an annular concrete or mortar liner (14) along an inside diameter, and a metal shell (12) surrounding the liner, wherein the liner (14) is in direct contact with the metal shell (12). The wall thickness of the liner can be from 10 to 50 times the thickness of the metal shell The pipe may be coated with a dielectric material A mold assembly used to form the pipe includes an annular concrete or mortar composition chamber formed between the metal shell and an inner mold member Pressurized water is used in the mold assembly to pressurize the concrete or mortar composition and exert a desired pressure force onto the metal shell while the composition cures in the mold Once a desired degree of cure is achieved, the pressure is removed causing the metal shell to exert a desired compression force onto the cured liner
Abstract:
Pressure cast lined steel pipes comprise an annular concrete or mortar liner along an inside diameter, and a metal shell surrounding the liner, wherein the liner is in direct contact with the metal shell. The wall thickness of the liner can be from 10 to 50 times the thickness of the metal shell. The pipe may be coated with a dielectric material. A mold assembly used to form the pipe includes an annular concrete or mortar composition chamber formed between the metal shell and an inner mold member. Pressurized water is used in the mold assembly to pressurize the concrete or mortar composition and exert a desired pressure force onto the metal shell while the composition cures in the mold. Once a desired degree of cure is achieved, the pressure is removed causing the metal shell to exert a desired compression force onto the cured liner.
Abstract:
A composite pipe having at least one metal end piece (2, 3) with a free end and a non-metal tubular component (10). The tubular component (10) is coupled to the at least one end piece (2, 3) opposite of the free end of the end piece (2, 3), by means of at least one peripherally extending, axially acting groove (6, 7) that the non-metallic tubular component (10) engages. The non-metallic tubular component (10) generally comprises axial fibres (11) extending down into the at least one groove (6, 7). The groove (6, 7) has a bottom (13) and a flank (14), which flank is located furthest away from the free end of the end piece (2, 3). Between the flank (14) and the axial fibres (11) there is provided an intermediate layer (15). Also described is a method of manufacturing such a composite pipe.
Abstract:
A steel liner (a pipe or vessel) is wrapped with a stack of sheets of glass fiber-reinforced epoxy matrix composite arranged in angle ply pattern. The stack is cured on the liner to bond the sheets together and to the liner. The wrapped liner is then internally pressurized to cause the liner to yield while the composite remains elastic. When de-pressurized, the liner has compressive residual stress and the composite has tensile residual stress. When the resulting hybrid structure is subsequently again pressurized, it is found that the elastic regime of the liner has been extended.