Patent ID: 8713797

Claim:
A method of manufacturing a composite cryogenic hose that comprises a tubular hose portion having an inner diameter of at least 200 mm, a length greater than 25 m, and extending continuously between two end fittings, wherein the hose portion comprises a tubular body disposed between inner and outer gripping members and the tubular body comprises at least two layers and includes at least one sealing layer and at least one reinforcing layer, wherein the method comprises: a. winding the inner gripping member around a non-metallic hollow mandrel while the mandrel is being rotated by a drive motor operatively connected with the mandrel wherein i. the mandrel is formed from a material selected from the group consisting of (I) a material having a ratio of Young's Modulus (E) to density (ρ) E/ρ in the range 0.1 to 10 GPa·m 3 /Mg and (II) a material having a ratio of Young's Modulus (E) to density (ρ) E/ρ in the range 20 to 22 GPa·m 3 /Mg and a density in the range 1.0 to 3.0 Mg/m, and ii. the mandrel has an outer diameter of at least 200 mm b. wrapping a first of the layers of the tubular body around the inner gripping member, c. wrapping a second of the layers of the tubular body around the first layer of the tubular body, d. winding the outer gripping member around the second reinforcing layer, e. applying a respective one of the end fittings to each end of the hose portion, and f. removing the hose from the mandrel.