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Gas pipe-line composite reinforcement construction and construction method thereof

A technology for gas pipelines and reinforcing structures, applied in the direction of pipe components, adhesive types, pipes/pipe joints/fittings, etc., can solve hidden dangers and safety problems of open flames, and achieve long service life, slow down corrosion rate, and improve efficiency. high intensity effect

Inactive Publication Date: 2005-06-29
BAOSTEEL DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the damage is often accompanied by pipeline perforation and gas leakage, open flames during welding pose a safety hazard; at the same time, the welded thick steel plate brings a large additional load to the bracket supporting the pipeline; Changes in thermal stress and metallographic structure will accelerate the corrosion of pipelines

Method used

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  • Gas pipe-line composite reinforcement construction and construction method thereof
  • Gas pipe-line composite reinforcement construction and construction method thereof
  • Gas pipe-line composite reinforcement construction and construction method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1: Straight pipe section reinforcement structure (see figure 1 )

[0030] When repairing the straight pipe section of the gas pipeline, the main reinforcing piece A is used in conjunction with the reinforcing keel belt 6. The main reinforcing piece A is coated on the outside of the gas pipeline to be repaired, and is composed of a protective layer 5 , a working layer 4 , a reinforcing layer 3 , and a primer layer 2 . The reinforcing keel belt is composed of a corrosion-resistant stainless steel belt 6a and a special locking buckle 6b, which is directly tightened on the pipeline body 1, and together with the main reinforcing piece A, reinforces the mechanical structure of the original pipeline. The outermost layer of the main reinforcement A is the protective layer 5, which is made of a composite material that is resistant to atmospheric aging, has excellent water resistance, and can reduce the degradation effect of ultraviolet rays on adhesives; the middle i...

Embodiment 2

[0032] Embodiment 2: bend section reinforcement structure (see figure 2 ).

[0033] For the repair of the bent pipe section, the 8 welding seams of the bent pipe shall be specially treated first, and then the main reinforcement A shall be used to repair the bent pipe section. That is, at the welding seam 8 of the curved pipe body, an inner reinforcement layer 9 made of glass fiber and structural adhesive is added, and the outermost protective layer 5 is spliced ​​by prefabricated parts cut out according to the shape of the pipe. to ensure effective protection of the working layer 4.

Embodiment 3

[0034] Embodiment 3: Reinforcing structure of the supporting part of the pipe bracket (see image 3 )

[0035] The overhead pipeline is supported by brackets 12 at intervals. Due to thermal expansion and contraction, the pipeline 1 will slip at the bracket support, so the reinforcements at the bracket support have special requirements for wear resistance. When repairing this part, the main reinforcing piece A is used in conjunction with the special reinforcing piece. The main reinforcement A used is similar to the main reinforcement of the straight pipe section, and the special reinforcement is composed of wear-resistant steel plate 10 and composite glue layer 11 .

[0036] During repairing, wear-resistant steel plate 10 is pasted on the gas pipeline body 1 above support bracket 12 with composite adhesive layer 11 earlier, then is fastened with corrosion-resistant stainless steel reinforcement keel belt 6 again. The composite adhesive layer 11 plays the role of sealing and c...

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Abstract

A gas pipeline composite reinforcement structure and a construction method thereof. The reinforcement structure is wrapped around the gas pipeline to be repaired, including the main reinforcement and auxiliary parts. The primer layer bonded to the gas pipeline is composed of additives with effective corrosion inhibition effect added to the primer layer; the auxiliary parts include reinforcing keel belts and / or special reinforcing parts that meet the special requirements of the pipeline. The construction steps are: measure the thickness of the main body of the repaired pipeline, and perform surface treatment and plugging treatment; process special parts of the pipeline or fix special reinforcements for special parts of the pipeline; apply stainless steel keel belts; coat the primer layer, Lay the working layer and reinforcement layer; bond the protective layer. The reinforced structure of the invention is light in weight, high in specific strength, low in cost, convenient in construction, has corrosion inhibition effect and excellent anticorrosion performance. There is no open flame, no high temperature, and no impact on the pipeline.

Description

technical field [0001] The invention relates to an on-line maintenance technology for overhead gas pipelines in service, and specifically refers to a reinforcement structure for on-line maintenance of corroded overhead gas pipelines. Background technique [0002] Due to the long-term erosion and erosion of various corrosive substances in the gas pipeline, serious corrosion will occur, which will bring hidden dangers to safe production. However, because the main gas pipelines are generally not equipped with pipelines, and its importance does not allow shutdown or gas shutdown, nor can the internal maintenance of the pipeline be adopted, it is required to carry out maintenance under the condition of temperature and pressure without stopping. The current maintenance method is to weld 6mm steel plates to the bottom 1 / 3 of the damaged pipeline for reinforcement. Since the damage is often accompanied by pipeline perforation and gas leakage, open flames during welding pose a safet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J163/00F16L55/168
Inventor 张宝龙张孝林张子瑾施健王林
Owner BAOSTEEL DEV CO LTD
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