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Corrosion-resistance composite pipe and manufacturing method thereof

A composite pipe and corrosion-resistant technology, which is applied in the direction of pipes/pipe joints/fittings, pipeline protection, mechanical equipment, etc., can solve the problems of easy corrosion, poor anti-corrosion effect, and reduced service life of composite pipes, so as to reduce corrosion, Corrosion prevention and service life improvement effect

Inactive Publication Date: 2016-09-07
中石化河南油建工程有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method uses glass powder thermal spraying and cladding on the inner wall of the steel pipe. Due to the high melting temperature of the glass, which reaches 600-800°C, the volume expansion of the steel pipe matrix is ​​very large during the process, and the inner anti-corrosion layer of the glass is formed. Afterwards, the steel pipe substrate will produce a large volume deformation, resulting in a gap between the inner anti-corrosion layer of the glass and the steel pipe substrate. During the use of the composite pipe, the gap is very prone to corrosion, and the anti-corrosion effect becomes worse, thereby reducing the composite pipe. tube life

Method used

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  • Corrosion-resistance composite pipe and manufacturing method thereof

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Embodiment 1

[0030] like figure 1 As shown, the corrosion-resistant composite pipe of this embodiment includes a pipe matrix 1, which is a carbon steel pipe to ensure the requirements of strength and pressure resistance. The inner wall of the steel pipe base is attached with a lining anti-corrosion layer, and the inner liner anti-corrosion layer includes a metal anti-corrosion layer 2 and a non-metallic anti-corrosion layer 3; The inner side of the end is melted and welded, the metal anti-corrosion layer is cylindrical, and its outer wall is attached to the inner wall of the steel pipe substrate. The material is nickel-based corrosion-resistant alloy, and the nickel-based corrosion-resistant alloy is Ni-Cr-Mo alloy; the material of the non-metallic anti-corrosion layer is epoxy resin, and the epoxy resin layer 3 is sprayed and fixed on the inner wall of the steel pipe matrix, and the epoxy resin layer It includes a main body part arranged between two metal anti-corrosion layers and an ann...

Embodiment 2

[0037] The corrosion-resistant composite pipe of this embodiment includes a pipe matrix, and the pipe matrix is ​​a carbon steel pipe to ensure the requirements of strength and pressure resistance. The inner wall of the steel pipe matrix is ​​attached with a lining anti-corrosion layer. The inner anti-corrosion layer includes a metal anti-corrosion layer and a non-metallic anti-corrosion layer; The outer wall of the layer is attached to the inner wall of the steel pipe substrate, and the end face of the metal anti-corrosion layer facing the outside of the steel pipe substrate is flush with the end face of the steel pipe substrate. The material of the metal anti-corrosion layer is 316L stainless steel; the material of the non-metallic anti-corrosion layer is epoxy resin The epoxy resin layer is sprayed and fixed on the inner wall of the steel pipe base, and the epoxy resin layer includes a main part arranged between two metal anti-corrosion layers and a metal anti-corrosion laye...

Embodiment 3

[0045] The corrosion-resistant composite pipe of this embodiment includes a pipe matrix, and the pipe matrix is ​​a carbon steel pipe to ensure the requirements of strength and pressure resistance. The inner wall of the steel pipe matrix is ​​attached with a lining anti-corrosion layer. The inner anti-corrosion layer includes a metal anti-corrosion layer and a non-metallic anti-corrosion layer; It is attached to the inner wall of the steel pipe base, and the end face of the metal anti-corrosion layer facing the outside of the steel pipe base is flush with the end face of the steel pipe base. The material of the metal anti-corrosion layer is 316L stainless steel; the material of the non-metallic anti-corrosion layer is epoxy resin, epoxy The resin layer is sprayed and fixed on the inner wall of the steel pipe matrix, and the epoxy resin layer includes a main body part arranged between two metal anti-corrosion layers and an annular covering part integrally arranged on the main bo...

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Abstract

The invention relates to a corrosion-resistance composite pipe and a manufacturing method thereof and belongs to the technical field of pipeline connection. The corrosion-resistance composite pipe comprises a pipe material base body and a lining corrosion-resistance layer arranged on the inner wall of the pipe material base body. The lining corrosion-resistance layer comprises metal corrosion-resistance layers arranged on the inner walls of the two ends of the pipe material base body and a non-metal corrosion-resistance layer arranged between the metal corrosion-resistance layers. By means of the corrosion-resistance composite pipe, the lining corrosion-resistance layer composed of the metal corrosion-resistance layers and the non-metal corrosion-resistance layer is arranged on the inner wall of the steel pipe base body, high-temperature heating is not needed in the manufacturing process of the lining corrosion-resistance layer, the phenomena that the steel pipe base body expands due to heating, and a gap exists between the lining corrosion-resistance layer and the steel pipe base body due to or contraction are avoided, corrosion at the combined position of the lining corrosion-resistance layer and the steel pipe base body is relieved, and the service life of the composite pipe is prolonged.

Description

technical field [0001] The invention relates to a corrosion-resistant composite pipe and a preparation method of the corrosion-resistant composite pipe, belonging to the technical field of pipeline connection. Background technique [0002] When transporting highly corrosive oil, gas, and water media in the petrochemical industry, in addition to high requirements for the pressure resistance of the pipeline, the anti-corrosion performance of the pipeline is also very high. Stainless steel pipes, stainless steel-lined composite pipes, and stainless steel joint pipes currently on the market can meet the high-pressure performance requirements of the pipeline, and can also better solve the corrosion problem of the weld seam during pipeline welding. Among them, the stainless steel composite pipe is lined with the steel pipe matrix The inner wall is compounded with a thin stainless steel layer, and the stainless steel joint pipe is made of stainless steel joints at both ends of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L58/08F16L58/10B05D1/12B05D3/00
CPCF16L58/08B05D1/12B05D3/00F16L58/1027
Inventor 陈自振张磊李新铬陈海林
Owner 中石化河南油建工程有限公司
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