RU116953U1 - PIPE CUTTING WELDING TEE - Google Patents

Abstract

Split die-welded tee for pipelines, consisting of a lower coupling half, characterized in that the upper coupling half is made by stamping with a branch pipe and an elliptical bottom welded to it, and the lower coupling half is butt welded to the upper coupling half, then the structure is welded to the pipe being repaired annular on both sides fillet seams.

Description

The utility model relates to repair systems for oil pipelines and oil product pipelines, and specifically to split tees for pipelines.

Known split tee, designed for the repair of pipes, holes and unauthorized taps. Split tees with pipe diameters from 325 to 720 mm are used to repair pipelines without stopping product pumping. A split tee consists of an upper and lower coupling half and a nozzle (see Classification of defects and methods for repairing defects and defective sections of existing oil pipelines. RD - 23.040.00-KON-090-07. M: Transneft Publishing House, 2007 p. 79)

This device is closest to the proposed technical solution and is taken as a prototype. However, the following disadvantages were identified:

defects in the weld appear in the weld, leading to a violation of the tightness and destruction of the welded joint.

when assembling a design with split tees for pipelines, a large amount of fire (welding) work is performed;

the complexity of the work during the assembly of the structure in the conditions of the route is quite high.

The problem the utility model aims to solve is to ensure the tightness of the tees, reduce the amount of welding work and reduce the complexity of repairing trunk pipelines and oil pipelines.

The technical result that can be obtained by implementing the utility model is achieved by reducing the amount of welding work and the time needed to repair the main pipelines and oil pipelines.

At the same time, the split die-welded tee for pipelines consists of a lower coupling half, and the upper coupling half is made using stamping with a pipe welded to it and an elliptical bottom.

A split die-welded tee for pipelines consisting of a lower coupling half, according to a useful model, the upper coupling coupling is made by stamping with a pipe welded to it and an elliptical bottom, the lower coupling coupling being butt welded to the upper coupling coupling, then the ring welds are welded from both sides to the pipe being repaired by ring .

The utility model is illustrated in the drawing, which shows the scheme of "tee split die-welded for pipelines."

In the drawing, the following notation:

1. Lower coupling half.

2. The upper coupling half.

3. Pipe

4. Branch pipe

5. The bottom (plug).

Dtr is the outer diameter of the pipe, mm.

Dвн - inner diameter of the pipe, mm.

L - half the length of the coupling half, mm.

S - wall thickness rather than 2 and lower 1 half couplings, mm.

h - flanging height, mm

Lп - pipe length, mm

R is the radius of the flanging, mm

S ₁ - wall thickness of the pipe 4, mm

dotv - pipe diameter, mm

The proposed design is used for pipes 3 with a diameter Dtr from 377 to 1220 mm.

The device consists of two parts lower and upper. The lower part is a coupling half 1, which is welded with a butt weld to the upper coupling half 2 and fillet welds to the pipe being repaired 3. The lower coupling half 1 is made for pipes with a diameter corresponding to the outer diameter of the pipe. The radius of the lower coupling half 1 is equal to half the outer diameter Dtr.

The upper part of the structure consists of an upper coupling half 2 and a pipe 4 welded to it and a bottom (plug) 5.

The elliptical bottom (plug) 5 is made by stamping.

The upper coupling half 2 differs from the prototype in that it is made using stamping, which makes it possible to manufacture the upper part of the structure in the factory, and not on the track. The proposed design by 50% reduces the amount of repair work when installing the developed device.

The radius of the flanging R at the upper coupling half 2 is at least two wall thicknesses of the sheet along the line from which the upper coupling coupling 2 is made. The wall thickness S of the upper coupling 2 and the lower half coupling 1 is 11-32 mm. The length of the nozzle Lp is 295-305 mm, and its diameter d from 159-720 mm. The thickness of the pipe 4 corresponds to the thickness of the upper coupling half 2.

The operation of the device. In the field, install the upper and lower coupling halves and weld the upper and lower parts of the structure with a longitudinal butt weld to the defective pipe section (through hole, nozzles, non-standardized structures, plungers, skipping indicators for cleaning and diagnostic tools, etc.). After performing a longitudinal seam, the structure is welded on two sides to the repair pipe with fillet welds. Welding of the elliptical bottom and pipe to the upper coupling half is carried out in the factory.

Application of the proposed design provides a 50% reduction in the volume of welding work and time for repair of trunk pipelines and oil products pipelines.

Claims (1)

A split die-welded tee for pipelines, consisting of a lower coupling half, characterized in that the upper coupling coupling is made by stamping with a pipe welded to it and an elliptical bottom, the lower coupling coupling being butt welded to the upper coupling coupling, then the rings are welded on both sides to the pipe being repaired fillet welds.