Gas pipe-line composite reinforcement construction and construction method thereof

A gas pipeline and reinforcement structure technology, applied in the direction of pipe components, adhesive types, pipes/pipe joints/pipe fittings, etc., can solve problems such as hidden dangers and safety of open flames, so as to prolong service life, slow down corrosion rate, reduce Effect of additional weight load

Inactive Publication Date: 2007-06-20
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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1: Straight pipe section reinforcement structure (see Figure 1)

[0031] 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. The protective layer 5, the working layer 4, the reinforcing layer 3, and the primer layer pipeline body 1 are used together with the main reinforcing piece A to strengthen the original pipeline. The mechanical structure is reinforced. 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 is the working layer 4, which is made of high strength, corrosion-resistant It is made of composite material with long service life, which can reinforce the ori...

Embodiment 2

[0033] Embodiment 2: Reinforcement structure of bent pipe section (see Figure 2).

[0034] 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

[0035] Embodiment 3: Reinforcing structure of the supporting part of the pipe bracket (see Figure 3)

[0036] 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 .

[0037] 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 cor...

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PUM

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Abstract

Gas pipe-line composite reinforcement construction and construction method thereof. The reinforcement construction is covered outside the gas conduit needing repair, consisting of main reinforcement element and assistant element. The main reinforcement element in order consists of compound material protective barrier, compound material working layer embeded glass fiber enhancing layer and bottom glue line binding the main reinforcement layer to the gas conduit. The bottom glue line is added the additive with the effective corrosion inhibiting effect. The assistant element comprises reinforcement keel band and / or specific reinforcement element suitable for conduit requirement. The construction procedure is: measuring the thickness of the repaired conduit, surface treatment and leaking-stopping treatment; treating the special part of the conduit and fixing the specific reinforcement element at the special part of the conduit; directing stainless steel keel band; coating bottom glue line to cover working layer and enhancing layer; binding protective barrier. The inventive reinforcement construction has a low cost, high specific tenacity, a good corrosion inhibiting function and antisepsis performance.

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 Patents(China)
IPC IPC(8): F16L55/168C09J163/00
Inventor 张子瑾袁继烈杨成领施健
Owner BAOSTEEL DEV CO LTD
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