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Production of tubular body comprising two or more layers of helically bended strips

A tubular body and tubular technology, applied in the direction of pipes, rigid pipes, pipes/pipe joints/fittings, etc., to save material weight and reduce stress corrosion

Inactive Publication Date: 2010-03-17
SHELL INT RES MAATSCHAPPIJ BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Prebending results in a helical shape

Method used

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  • Production of tubular body comprising two or more layers of helically bended strips
  • Production of tubular body comprising two or more layers of helically bended strips
  • Production of tubular body comprising two or more layers of helically bended strips

Examples

Experimental program
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Embodiment Construction

[0050] refer to figure 1 , 2 and 3, show a tubular body 1 comprising two superimposed elongated metal strips 2 and 3 helically wound around an inner sleeve 4 which surrounds Hollow core 5. Each layer consists of a metal strip. The overlap between the strips in these two layers is 50%. Strips 2 and 3 are made of high strength steel. The strip 3 is helically wound around the inner sleeve 4 . Strip 2 is helically wound around strip 3 in a pattern overlapping by 50%. There is a thin layer of adhesive between the inner sleeve 4 and the strip 2 and between the strip 3 and the strip 2 . Around the outer metal strip 2 there is a thin layer of protective cladding. Figure 4 An elongated metal strip 3 is shown. In the method according to the invention, the strip is helically bent around a line perpendicular to line l (for example l', l" and l'"). It is evident that during bending the wire around which the metal strip is bent will move continuously in the direction of bending. ...

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PUM

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Abstract

Process for the manufacture of an elongated, multilayered tubular body (1) comprising an elongated, tubular inner hollow core (5), optionally an elongated, tubular inner casing (4) and an elongated, tubular outer casing, the inner casing, when present, surrounding the hollow core, the outer casing surrounding the inner casing, when present, or otherwise the hollow core, the outer casing comprising at least two layers (2, 3), each layer consisting of one or more longitudinally preformed, flat elongated metal strips, the preforming of the strips such that the strips have been bent helically in such a way that the consecutive windings of the helix or helices touch or almost touch to each other, each strip in one layer overlapping with other strips in other layers, the layers in the outer casing being bound to each other by an adhesive.

Description

technical field [0001] The invention relates to a method for manufacturing a tubular body. More particularly, the present invention relates to the manufacture of an elongated multilayer tubular body comprising an elongated inner hollow core, an elongated inner sleeve and an elongated outer sleeve, the inner sleeve surrounding A hollow core, an outer sleeve surrounds an inner sleeve, the outer sleeve comprises at least two layers of flat metal strip preformed in the longitudinal direction. The preforming of the metal strips involves bending the metal strips in particular so that each metal strip becomes a helix by plastic deformation. The preformed metal strip can be made, for example, of high-strength steel, in particular steel whose material has a large proportion in the martensitic phase. The inner sleeve may eg be made of a corrosion resistant material. Such a tubular body has the advantage that a tube with a smaller wall thickness can withstand a high internal pressure ...

Claims

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Application Information

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IPC IPC(8): F16L9/04F16L9/128B21C37/12
CPCF16L9/042F16L9/128B21C37/123
Inventor R·N·伯克R·范沙尔克维克R·J·A·史密斯N·J·维内罗
Owner SHELL INT RES MAATSCHAPPIJ BV
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