MULTILAYER STRUCTURE FOR TRANSPORTING OR STORING GAS OR FOR EXPLOITING OFFSHORE OIL DEPOSITS UNDER THE SEA
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United States of America
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Issued Date -
Mar 20, 2025
app pub date -
Dec 4, 2024
filing date -
Dec 4, 2024
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Abstract
A multilayer structure for transporting or storing gas including, from the inside to the outside, at least one sealing layer and at least one composite reinforcing layer, the innermost composite reinforcing layer being welded to the outermost adjacent sealing layer, the sealing layers being a composition predominantly including at least one semi-crystalline thermoplastic polymer P1i (i=1 to n, n being the number of sealing layers), the Tm of which is less than 280° C., and at least one of said composite reinforcing layers being a fibrous material in the form of continuous fibers impregnated with a composition predominantly including at least one thermoplastic polymer P2j, (j=1 to m, m being the number of reinforcing layers), the thermoplastic polymer P2j having a Tg greater than the maximum temperature of use of the structure (Tu), with Tg≥Tu +20° C., Tu being greater than 50° C.
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