• Designing Flexible Pipes

    Our unbonded flexible pipe structure consists of carefully preformed and helically wound metallic strips and armour wires combined with concentric layers of polymer, textile, fabric tape and friction-reducing materials. The fundamental design basis for a Flexibles structure is the API 17J specification and the associated Recommended Practice API 17B, which outline the standard industry requirements for design, material selection, manufacture, testing, marking and packaging of the flexible pipe. For every specific application, we will also incorporate and address the client’s project specification to ensure full compliance and optimum operational performance.

    In designing and optimizing an unbonded flexible pipe structure designation of adequate materials, the correct balancing of pipe structural elements, geometry and interaction between layers must be considered. We ensure the long-term durability of a Flexibles pipe through a combination of only using symmetrical pressure armour profiles – which contain an absolute minimum of residual stresses after having been applied onto the flexible pipe structure – and a careful preforming of the double-layer cross-wound tensile armour comprised of multiple rectangular steel wires. 

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