PIPE LINE MADE FROM COMPOSITE MATERIAL AND METHOD OF MANUFACTURE OF SUCH PIPE LINE Russian patent published in 2004 - IPC

FIELD: manufacture of pipe lines for transportation of various liquids and gases; mechanical engineering; aircraft manufacture; chemical industry; space engineering. SUBSTANCE: proposed pipe line includes sealing envelope made from multi-layer film plastic with flat reinforcing components made from high-strength heat-resistant polymer film, for example polyimide with smooth layers of polymer binder made from polymer possessing lower degree of heat resistance , fluoroplastic for example. Inner surface of said sealing envelope is coated with lining layer made from material similar to polymer of binder inter-layers. Wound on the outside on last layer of sealing envelope is one anti-adhesive layer of reinforcing band made from high-strength heat-resistant polymer , for example polyimide film with polymer binder made from fluoroplastic applied on one side. Layer is laid on the outside without coat. Pipe line is provided with flanged metal tips for securing the sealing envelope. Method of manufacture of such pipe line includes winding lining layer on cylindrical surface of technological mandrel; number of layers of tape shall ensure total thickness no less than three thicknesses of high-strength heat-resistant polymer film of reinforcing components made from material similar to layers of binder applied on both surfaces of reinforcing components. Rated number of layers of flat reinforcing components is wound on surface of lining layer made in form of tape from high-strength heat- resistant polymer film, for example polyimide film with thin layer of polymer binder applied on both surfaces; binder is made from material possessing lower degree of heat resistance, fluoroplastic for example. Layer of reinforcing tape made from high-strength heat-resistant polymer film, polyimide film for example with thin layer of binder applied on one of its surfaces is last to be wound. It is laid on surface not coated with polymer binder and technological layer of thermal setting material is wound on it. EFFECT: enhanced tightness; improved quality of inner surface; enhanced flexibility of pipe line; serviceability of pipe line in cryogenic temperature field. 3 cl, 2 dwg