Pipe lining material for use for at least two predefined pipeline nominal widths
AssigneeKarl Otto Braun KG
InventorMichael Lill
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Abstract
The invention relates to a pipeline lining material for use for at least two, preferably three, predefined pipeline nominal widths, comprising an elastic round knitted material, which is knitted under pretension so as to contract to an untensioned diameter of +/−10% of the smallest predefined pipeline nominal width after being knitted, and comprising an elastically flexible film tube arranged around the round knitted material. The pipe lining material can be expanded by at least 50% in the transverse direction under a pressure of maximally 0.7 bar, at which the untensioned round knitted material maximally has a diameter that is reduced by 55% compared to the round knitted material under pretension.
Claims20
A pipeline-lining material for use for at least two, predefined nominal pipeline widths comprising
- an elastic circular-knit material knitted under pre-tension such that, after knitting, it contracts to a relaxed diameter of +/−10% of the smallest predefined nominal pipeline width, and
- an elastically extensible film tube arranged about the elastic circular-knit material, wherein the pipe-lining material is at least 50% widenable in the transverse direction at a pressure of not more than 0.7 bar, and wherein the relaxed circular-knit material at most displays a 55% smaller diameter than the pre-tensioned circular-knit material.
Dependencies are inferred from the claim text.