RU2046244C1 - Pipe joint - Google Patents

Abstract

FIELD: pipe line engineering. SUBSTANCE: hollow step insert connects the pipes of different diameter. The pipes are mounted one inside the other. The insert is interposed in the space between the pipes. The female pipe abuts against the projection of the insert and is coupled with pipes by welds without penetration in the pipe. The thickness of the wall of the junction is half outer diameter of the female pipe and inner diameter of the male pipe. EFFECT: enhanced reliability. 2 dwg

Description

 The invention relates to the connection of pipes by welding, in particular their end sections.

 It is known to weld a flat flange with a pipe with a seam placed inside the flange, while the inner surface of the flange is made with a protrusion.

 The disadvantage of the connection is its inner seam, requiring a short length of one of the parts to be joined.

 Closest to the invention, the technical solution is one-piece connection of pipes of different diameters with a hollow stepped insert connecting these pipes.

 The objective of the invention is to expand technological capabilities and increase the reliability of the connection.

 This is achieved by the fact that the pipe connection contains pipes of different diameters one to another, between which a hollow step insert is installed, placed in the gap between them with the stop of the enclosing pipe in its protrusion and the formation of a minimum thickness of the joint wall equal to half the difference in the outer diameter of the enclosing pipe and the inner diameter of the covered pipe, while the liner is connected to the pipes by external seams without penetrating them into the pipe.

 Figure 1 shows the connection of the pipes with the outer protrusion of the liner; figure 2 connection of pipes with the outer and inner protrusions of the liner.

 The pipe connection comprises an enclosing pipe 1, a male pipe 2 and a liner 3 connected to each other by external seams 4. The liner 3 is made with an external protrusion 5 for stopping the pipe 1, the larger diameter of which is equal to the outer diameter of the pipe 1, and the inner diameter of the liner 3 is the outer diameter of the pipe 2. The liner 3 can be made with an inner protrusion 6 for stopping the pipe 2. The protrusion 5 is made with a bevel, and the protrusion 6 with a bevel or without it. Pipes 1 and 2, liner 3 form a minimum joint wall thickness equal to half the difference between the outer diameter of the female pipe and the internal diameter of the male pipe.

 The pipe connection is as follows.

 The liner 3 is made on the inner diameter of the female pipe 1 and the outer diameter of the male pipe 2 with a protrusion 5 on the external diameter of the female pipe 1 with a bevel and inserted into the gap between the pipes 1 and 2 entering one another with the overlapping of their joints. At the same time, for stopping the male pipe 2 when entering the female pipe 1, an inner protrusion 6 with or without a bevel is made on the liner 3. After entering the components into each other, the liner 3 is welded with external seams 4 to the pipes 1 and 2.

Claims (1)

 PIPE JOINT, containing pipes of different diameters and a hollow stepped liner connecting them, characterized in that the pipes are installed one on the other, and the hollow liner is placed in the gap between them with the stop of the covering pipe in its protrusion and connected to the pipes by external joints without penetrating them inside pipe, while the wall thickness of the connection is equal to half the difference between the outer diameter of the female pipe and the inner diameter of the male pipe.

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