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Mend filling and renovation reinforced method for bearing equipment wall surface

A pressure-bearing equipment and wall technology, which is applied in the field of patch filling, filling, repairing and reinforcing of the wall of pressure-bearing equipment, can solve the problems of pipeline transmission, failure to achieve the expected effect of patch reinforcement, etc., and achieves a simple method and meets the mechanical strength requirements. Effect

Inactive Publication Date: 2008-08-20
BEIJING SAFETECH PIPELINE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is a gap between the patch and the corrosion pit or mechanical damage, and the pressure on the pipeline is often difficult to transfer from the original pipeline to the patch, and the expected effect of patch reinforcement cannot be achieved, so there is still a large risk in the operation of the pipeline

Method used

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  • Mend filling and renovation reinforced method for bearing equipment wall surface
  • Mend filling and renovation reinforced method for bearing equipment wall surface
  • Mend filling and renovation reinforced method for bearing equipment wall surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The reinforcement of embodiment 1 pipeline

[0045] Such as figure 1 As shown, the diameter of pipeline 1 to be reinforced is Φ325mm, the wall thickness is 7mm, and the material is Q235b. There is a volumetric corrosion point 2 at the 2 o'clock direction on the outer wall of the tube, with a depth of 4mm. The yield pressure of the pipeline is calculated to be about 6MPa, so reinforcement is required. The corrosion point of the pipeline is reinforced by using the method of patching and injecting filler of the present invention. The operation steps are as follows:

[0046] 1. Processing of patches

[0047] According to factors such as the outer diameter of the pipe and the shape and size of the corrosion point, the patch 3 is obtained from a pipe with a diameter of Φ325mm, a wall thickness of 7mm, and the same material as Q235b, which is finely machined by gas cutting and angle grinding. Clean the oil, paint, rust, burrs and other dirt on the inner and outer surfaces...

Embodiment 2

[0054] Full-scale blasting test of embodiment 2 reinforced pipeline

[0055] According to SY-T5992-94 "Conveying Steel Pipe Hydrostatic Pressure Blasting Test Method", simulate the same volume defect (60×40mm, depth 5.3mm) on two sections of ∮325×7 pipeline. Make the same patch (180×120mm). Reinforcing with ordinary patch (scar) and the method of filling patch of the present invention. After 24 hours, a full-scale burst test was performed. Results Two cracks appeared in ordinary welding scar pipelines at 15.8MPa, and cracks appeared at the defects of repaired pipelines; while the pipelines reinforced by patching and filling filling method of the present invention were still intact at 28MPa, indicating that the pressure bearing capacity of pipelines was obvious Improve to achieve the reinforcing effect.

Embodiment 3

[0056] Embodiment 3 Reinforcing of pressure vessel

[0057] For defects 7 caused by mechanical damage on the pressure vessel 6 (see attached Figure 5 ), we use the same steps as in Example 1 to repair and reinforce. Among them, the filler is 191 unsaturated polyester resin from Jiangxi Ganzhong Resin Company.

[0058] After reinforcement (see attached Figure 6 ), pressurize the container. When the pressure reaches 10MPa, the container and the reinforcement are intact, which proves that after reinforcement with this technology, the expected reinforcement effect is achieved.

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Abstract

The invention relates to a method used for repairing and reinforcing a wall surface of bearing equipment, in particular to a patching and material filling repairing and reinforcing method and the application of the wall surfaces of a pipeline, a pipe and a pressure vessel. The repairing and reinforcing method of the invention comprises welding patches at the positions to be repaired and reinforced on the wall surfaces of the bearing equipment, filling a filler between the patch and the wall surface, thus achieving the repairing and reinforcing operation at the positions. The repairing and reinforcing method used for the wall surfaces of the bearing equipment is suitable for temporary rush repair or long-term repairing reinforcement of various conveying pipelines, pressure vessels and subsidiary facilities, can prolong the service life of the bearing equipment and improves safety operation pressure.

Description

field of invention [0001] The present invention relates to a method for repairing and reinforcing the wall of pressure-bearing equipment and its application. Specifically, the present invention relates to a method for repairing and reinforcing various pipes, pipe fittings, pressure vessels and their auxiliary facilities by patching and injecting stuffing and its application. technical background [0002] Oil and gas pipeline transportation is one of the five major transportation industries in the national economy. At present, my country's long-distance oil and gas pipelines alone reach more than 45,000 kilometers. During the long-term service of these pipelines, due to the effects of formation pressure, soil corrosion, galvanic corrosion, and external force damage, accidents such as pipeline bursts and leakages occur, affecting the normal transportation of pipelines. [0003] Pipeline repair and reinforcement technology is an important means to ensure the integrity of the pi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L55/175
Inventor 王金友王修云郑岩刘国
Owner BEIJING SAFETECH PIPELINE