Abrégé

Disclosed are a pre-tightening force repairing method, a repairing method involving a combination of a pre-tightening force and a clamp, and a repaired pipeline. The repairing method includes: (a) fixing part of a fiber material to a pipeline; (b) applying a pre-tightening force to the fiber material, winding multiple layers of the fiber material around the pipeline under the pre-tightening force; (c) in the state of applying the pre-tightening force, completing the curing of the multi-layer fiber composite material; and (d) mounting a clamp outside a repairing part of the fiber composite material. The magnitude of the pre-tightening force is designed to overcome the situation whereby a fiber composite material layer comes unstuck from the pipeline due to the radial shrinkage of the pipeline caused by a decrease in internal pressure and/or the axial stretching of the pipeline after the pipeline, which is under pressure, is repaired.

Classes IPC  ?

• F16L 55/168 - Dispositifs pour aveugler les fuites dans les tuyaux ou manches à partir de l'extérieur du tuyau
• F16L 55/175 - Dispositifs pour aveugler les fuites dans les tuyaux ou manches à partir de l'extérieur du tuyau en utilisant des matériaux dont on remplit un espace autour du tuyau avant leur durcissement

Abrégé

Disclosed are a pre-tightening force repairing method, a repairing method involving a combination of a pre-tightening force and a clamp, and a repaired pipeline. The repairing method involving a combination of a pre-tightening force and a clamp comprises the following steps: (a) fixing part of a fiber material to a pipeline; (b) applying a pre-tightening force to the fiber material, winding multiple layers of the fiber material around the pipeline under the action of the pre-tightening force so as to cover a part, needing to be repaired, of the pipeline, and coating or impregnating the fiber material with an infiltrative adhesive during the winding of each layer of the fiber material so as to form a multi-layer fiber composite material (3); (c) in the state of applying the pre-tightening force, completing the curing of the multi-layer fiber composite material (3); and (d) mounting a clamp outside a repairing part of the fiber composite material (3), to which the pre-tightening force has been applied, and pouring a curable polymer into a gap formed between the clamp and the pipeline. The magnitude of the pre-tightening force is designed to overcome the situation whereby a fiber composite material layer comes unstuck from the pipeline due to the radial shrinkage of the pipeline caused by a decrease in internal pressure and/or the axial stretching of the pipeline after the pipeline, which is under pressure, is repaired.

Classes IPC  ?

• F16L 55/17 - Dispositifs pour aveugler les fuites dans les tuyaux ou manches à partir de l'extérieur du tuyau au moyen de bagues, de bandes ou de manchons pressés contre la surface extérieure du tuyau ou de la manche

Abrégé

A flange is disclosed in the invention. A cooling groove (4) is provided on the sealing surface (8) of said flange. At least a cooling hole (9) is provided at the rear (6) of the flange. Said cooling hole (9) connects with the cooling groove (4) by penetrating through the flange. The flange in the invention is applied onto the antisepsis of various connectors of metal pipes with eroding medium. A pipeline with said flange and a connecting method therefor are also disclosed in the invention. The method of connecting pipelines could prevent from destroying the inner antiseptic layer of the pipeline when heat being produced due to welding, so as to ensure the integrity of said inner antiseptic layer of the pipeline to further ensure that the entire pipeline has excellent antiseptic performance.

Classes IPC  ?

• F16L 13/02 - Raccords soudés à l'autogène sans apport de métal
• F16L 53/00 - Chauffage des tuyaux ou des systèmes de tuyauxRefroidissement des tuyaux ou des systèmes de tuyaux

Abrégé

A method for repairing, reinforcing or enhancing a pipeline, especially a metallic pipeline, uses basalt fiber reinforcing material and resin basis material. The intensity, modulus of the reinforcing or enhancing material are close to those of the metallic pipeline to form an unity with the pipeline, so as to make the bearing capacity of the finally produced composite repairing layer equal to or even higher than that of the original pipeline; and the basalt material is one kind of insulating material, so it can improve the pipeline's compatibility with the cathodic protection and the anti-electrochemical corrosion ability.

Classes IPC  ?

• F16L 55/168 - Dispositifs pour aveugler les fuites dans les tuyaux ou manches à partir de l'extérieur du tuyau
• C08K 7/06 - Éléments
• C09J 163/00 - Adhésifs à base de résines époxyAdhésifs à base de dérivés des résines époxy

Abrégé

A method for repairing/strengthening and crack arrest of pipe, especially metal pipe, in which, first, to cover an insulated material on the position needing repairing/strengthening and crack arrest, then to lay a high strength fiber composite material. The modulus of elasticity of the material used in the invention is close to the metal pipe's, it can be integrated with the pipe and bear the internal pressure with the pipe, thus the final composite pipe reaches required bear capacity, such as, the original most operation pressure of pipe can be recovered; and it can take effect for crack arrest of pipes when pipes happen burst accident. Otherwise, because of the insulated material is used on the bottom layer, it prevent thoroughly from galvanic corrosion between pipe and strengthening material. The method can be implemented simply and without fire, it is advantageous to tight joint between strengthening material and pipe, and between strengthening layers, and it can be used to repair and enhance the pipeline in use.

Classes IPC  ?

• F16L 55/168 - Dispositifs pour aveugler les fuites dans les tuyaux ou manches à partir de l'extérieur du tuyau

Abrégé

A repairing, reinforcing/enhancing technique for a pressure mechanism by combining a fiber-reinforced composite material with pouring the curable polymer under the help of a clamp. The technique includes: laying one or several layers of fiber-reinforced composite materials (3) on the part needing repairing, reinforcing/enhancing; installing a clamp (4, 5) outside of the fiber-reinforced composite materials (3); pouring a curable polymer into the spacing between the clamp (4, 5) and the pressure mechanism (1) to finish the repair, reinforcement/enhancement of the part. The invention can be used in the first-aid repair or the long term enhancement of all kinds of pipelines, pipe fittings and pressure vessels to lengthen the survice life and improve the safe operating pressure.

Classes IPC  ?

• F16L 55/175 - Dispositifs pour aveugler les fuites dans les tuyaux ou manches à partir de l'extérieur du tuyau en utilisant des matériaux dont on remplit un espace autour du tuyau avant leur durcissement
• F16L 55/168 - Dispositifs pour aveugler les fuites dans les tuyaux ou manches à partir de l'extérieur du tuyau
• F16L 55/162 - Dispositifs pour aveugler les fuites dans les tuyaux ou manches à partir de l'intérieur du tuyau
• C08K 7/06 - Éléments
• C09J 163/00 - Adhésifs à base de résines époxyAdhésifs à base de dérivés des résines époxy

Abrégé

A metal composite pipe has a middle pipe and a pair of end rings (3) attached to the opposite ends of the middle pipe respectively. Said middle pipe includes an outer metal pipe (1) and an inner pipe (2). Said end rings (3) are monolayer metal rings. Said inner pipe (2) and said end rings (3) are made of the anticorrosion metal. Said metal composite pipe also has an outer pipe and an inner pipe (5). Said outer pipe includes an outer middle pipe (4) and a pair of end rings (6) attached to the opposite ends of the outer middle pipe (4) respectively. Said inner pipe (5) is an integrate pipe. Said inner pipe (5) and said end rings (6) are made of the anticorrosion metal. A method for producing a metal composite pipe and a continuous anticorrosion pipeline produced by connecting many said metal composite pipes end to end are also disclosed.

Classes IPC  ?

• F16L 13/00 - Raccords de tuyaux non démontables, p. ex. raccords soudés, collés ou matés
• F16L 39/00 - Raccords ou accessoires de raccordement pour tuyaux à double paroi ou à canaux multiples ou pour assemblages de tuyaux
• F16L 58/08 - Revêtements caractérisés par les matériaux utilisés de métal
• F16L 58/00 - Protection des tuyaux ou des accessoires pour tuyaux contre la corrosion ou l'entartrage
• F16L 9/18 - Tuyaux à double paroiTuyaux à canaux multiples ou assemblages de tuyaux
• B23P 11/00 - Assemblage ou désassemblage de pièces ou d'objets métalliques par des processus du travail du métal non prévus ailleurs
• B21D 39/04 - Utilisation de procédés permettant d'assembler des objets ou des parties d'objets, p. ex. revêtement par des tôles, autrement que par placageDispositifs de mandrinage des tubes des tubes avec des tubesUtilisation de procédés permettant d'assembler des objets ou des parties d'objets, p. ex. revêtement par des tôles, autrement que par placageDispositifs de mandrinage des tubes des tubes avec des barres