Patent ID: 11884306
Assignee: TATA STEEL NEDERLAND TECHNOLOGY B.V.
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 1:
2. A tube section, having a length L, for constructing a tube suitable for underpressure applications, with an incircle having a diameter of at least 2 m,
wherein the tube section comprises:
a plurality of longitudinal stringers,
a plurality of circumferential sections, and
a plurality of thin-walled skin sections having a radius of curvature R and wherein the curvature extends along the entire length of the thin-walled skin sections,

wherein the longitudinal stringers are connected to an inner surface of the circumferential sections;
wherein the plurality of longitudinal stringers are mounted to the circumferential sections substantially equidistantly to form a skeletal framework for attaching the thin-walled skin sections;
wherein the thin-walled skin sections have a pair of opposed long edges and a pair of opposed short edges, wherein the long edges of the thin-walled skin sections are mounted fixedly and air-tightly to the longitudinal stringers, and wherein, in use, the thin walled sections between the stringers are loaded in tension;
wherein the centre point M of the radius of curvature R of the curved thin-walled skin sections lies outside the tube section.