METALLOPOLYMER TUBE (VERSIONS) Russian patent published in 2003 - IPC

FIELD: manufacture of polymer tubes reinforced by solid metallic reinforcing members; transportation of aggressive liquid and gaseous media in gas, oil and chemical industries. SUBSTANCE: according to first version, metallopolymer tube includes reinforcing member located in polymer monolith and made in form of rigid metal framework consisting of layer of longitudinal spiral members fastened together by welding, for example; reinforcing member includes also flexible layer of spiral members mounted inside rigid framework without rigid coupling with it; direction of winding of layer of spiral members coincides with direction opposite to direction of winding outer rigid layer in rigid framework; it is secured on activated outer surface of inner polymer tube at preset pitch; activated outer surface includes layer of polymer tube which was machined or heat-treated beforehand or heat-treated polymer layer is applied additionally on this tube; polymer monolith includes inner polymer tube with activated outer surface and extruded layer of polymer; activated outer surface of inner polymer tube possesses adhesive properties relative to extruded layer of polymer. According to second version, metallopolymer tube includes reinforcing member located in polymer monolith and made in form of rigid metal framework consisting of layers of longitudinal spiral members fastened together by welding, for example; framework includes additional layer of spiral members mounted inside rigid framework and secured in it at preset pitch of winding; weld seams are located on side of inner surface of layer of longitudinal members; direction of winding of inner additional layer of spiral members coincides with direction of winding of outer spiral layer in rigid framework or direction is reversed. EFFECT: increased loading capacity; extended field of application; enhanced reliability. 3 cl, 2 dwg