SECTION OF TWO-LAYER HARD PIPELINE AND METHOD OF ITS MANUFACTURE (VERSIONS) Russian patent published in 2018 - IPC F16L9/133 F16L9/10 

FIELD: construction.

SUBSTANCE: pipeline section comprises an outer pressure shell 1 made of a fiberglass material based on a reactive plastic binder and an inner containment shell 2 secured to it from a plurality of flat or cylindrical elements made of electrical porcelain that cover the inner surface of the outer shell and are fastened together at the ends and with a hardened casing reactoplastic binder. In the first embodiment, a forming base is formed from the planar elements by temporarily securing it on the process mandrel with a releasable adhesive. After that, the outer shell is manufactured by impregnating the fiberglass material with a reactive plastic binder and winding it onto the forming base. After the binder solidifies, the mandrel is separated. According to the second embodiment of the method, the shaping base is made of hollow cylindrical elements by their free arrangement on a cylindrical mandrel and axial compression. The following operations are the same as in the first version of the method.

EFFECT: simplification of the pipe manufacturing technology while providing a significant level of its strength and protection against destruction.

4 cl, 6 dwg