| 摘要 |
A subsea flexible umbilical 2 comprises a plurality of umbilical components, which can include electric cables, optical fibre cables, steel tubes or thermoplastic hoses. An umbilical component comprises a composite tube 6 having a metal liner 10 and a composite outer layer 20. The umbilical 2 achieves the benefit of the mechanical properties and the anti-permeation properties of a metal liner such as a stainless steel tube, whilst minimizing any increase in overall weight of the umbilical by maintaining the use of a composite outer layer or wrap. The composite material can comprise fibres in a polymer matrix, which can be an epoxy matrix. The fibres can be carbon fibre, glass fibre, aramid fibre, or PBO. The umbilical can be reelable and greater than 2000m in length. The umbilical can be structured so the that axial loading is wholly or substantially withstood by the metal liner, which can be steel or stainless steel, and the radial loading is shared by the metal liner and the composite outer layer. |
