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A carbon fiber reinforcement process for corrosion and protection of petrochemical equipment

A petrochemical and carbon fiber technology, which is applied in the field of petrochemical pressure device repair, can solve the problems of reducing the tensile stress at the defect, reducing the stress of the pipe wall, and easy to fall off, so as to reduce the tensile stress, prevent galvanic corrosion, and process steps simplified effect

Inactive Publication Date: 2017-10-20
北京天诚宇新材料技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The purpose of the present invention is to solve the problems in the prior art that the repair material is easy to fall off, delaminate, hollow and crack during repeated use, and at the same time avoid the galvanic corrosion of the interlayer glue in the repair material during use , through the repair process described in the present invention, it is ensured that the repair material plays the role of transmitting the pressure of the pipe wall, and at the same time, the repair layer formed by the carbon fiber composite material on the outer wall of the pipe after the epoxy resin is cured shares the internal pressure of the pipe and limits the expansion and deformation of the pipe, reducing the pressure of the pipe. The stress of the wall and limit the stress concentration at the defect of the pipeline, reduce the tensile stress at the defect, and then realize the reinforcement and repair of the defect of the pipeline

Method used

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  • A carbon fiber reinforcement process for corrosion and protection of petrochemical equipment
  • A carbon fiber reinforcement process for corrosion and protection of petrochemical equipment
  • A carbon fiber reinforcement process for corrosion and protection of petrochemical equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] Step 1: Pre-treat the inner surface of the defect of the pressure vessel 110. The surface of the substrate should be fully polished without any attachments. If there are sharp edges and corners on the pasting part, it needs to be rounded. The minimum inner diameter is 20mm. The original anti-corrosion layer on the surface of the pipeline within 150mm in the two axial directions shall be completely removed by mechanical derusting. St2.5 level and above as stipulated in the "Assessment", at the same time, the depth of the defect is measured to be 6.5mm, the axial length of the defect is 78mm, the circumferential length of the defect is 15mm, and the wall thickness reduction is 36%. According to the ASME PCC-2-2011 standard The number of reinforcement layers of carbon fiber composite materials required in the calculation is 4 layers;

[0069] The second step is to use the special repair agent 120 (bottom epoxy resin glue) to fill and level the defect, and the special repai...

Embodiment 2

[0085]Step 1: Pre-treat the inner surface of the defect of the pressure vessel 110. The surface of the substrate should be fully polished without any attachments. If there are sharp edges and corners on the pasting part, it needs to be rounded. The minimum inner diameter is 20mm. The original anti-corrosion layer on the surface of the pipeline within 150mm in the two axial directions shall be completely removed by mechanical derusting. St2.5 level and above as stipulated in the "Assessment", at the same time, the depth of the defect is measured to be 8.6mm, the axial length of the defect is 93mm, the circumferential length of the defect is 55mm, and the degree of wall thickness reduction is 42%. According to the ASME PCC-2-2011 standard The number of reinforcement layers of carbon fiber composite materials required in the calculation is 6 layers;

[0086] The second step is to use the special repair agent 120 (bottom epoxy resin glue) to fill and level the defect, and the spec...

Embodiment 3

[0102] Step 1: Pre-treat the inner surface of the defect of the pressure vessel 110. The surface of the substrate should be fully polished without any attachments. If there are sharp edges and corners on the pasting part, it needs to be rounded. The minimum inner diameter is 20mm. The original anti-corrosion layer on the surface of the pipeline within 150mm in the two axial directions shall be completely removed by mechanical derusting. St2.5 level and above as stipulated in the "Assessment", at the same time, the depth of the defect is measured to be 7.9mm, the axial length of the defect is 56mm, the circumferential length of the defect is 23mm, and the wall thickness reduction is 37%. According to the ASME PCC-2-2011 standard The number of reinforcement layers of carbon fiber composite materials required in the calculation is 4 layers;

[0103] The second step is to use the special repair agent 120 (bottom epoxy resin glue) to fill and level the defect, and the special repai...

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Abstract

The invention discloses a carbon fiber reinforcement technology for corrosion and protection of a petrochemical device. The carbon fiber reinforcement technology comprises the following steps of step one, pretreating the inner surface of a pipe wall defect, and polishing the surface of a substrate until no attachment exists; secondly, performing filling and leveling treatment on the defect part by using a repairing agent; thirdly, fully filling a part where the repairing agent is fully filled and the surface of periphery pipe body with epoxy resin glue; fourthly, winding carbon fiber composite material cloth at a part where the epoxy resin glue is fully filled. The carbon fiber reinforcement technology disclosed by the invention has the characteristics of good sticking property, no layering and no hollowing and cracking in the process that a repairing material is repeatedly used for a long time; in addition, the galvanic corrosion resistance between the repairing material and the pipeline can be guaranteed by the reinforcement technology disclosed by the invention; meanwhile, the carbon fiber reinforcement technology also has the characteristics that technical steps are simple, the repairing material is good in curing effect and the like.

Description

technical field [0001] The invention relates to the field of petrochemical pressure device repair, in particular to a petrochemical device corrosion and protection carbon fiber reinforcement process. Background technique [0002] The main purpose of carbon fiber is to compound with resin, metal, ceramics and other substrates to make structural materials. Carbon fiber reinforced epoxy resin composite materials have the highest specific strength and specific modulus among existing structural materials. In areas with strict requirements such as rigidity, weight, and fatigue characteristics, carbon fiber composite materials have advantages in the occasions that require high temperature and high chemical stability. Carbon fiber can be processed into fabrics, felts, mats, belts, paper and other materials. In addition to being used as thermal insulation materials, carbon fiber is generally not used alone. It is mostly added to resin, metal, ceramics, concrete and other materials as...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J201/00C09J163/02C09J175/04C09J11/04C09J11/06F16J12/00F16L55/17B32B37/12B32B38/00
CPCB32B37/1284B32B38/0012B32B2038/0016B32B2038/002C08K3/04C08K3/22C08K5/544C08K2003/2227C08L2205/025C08L2205/035C09J11/04C09J11/06C09J163/00C09J201/00F16J12/00F16L55/17C08L63/00C08L75/04C08K13/02C08K3/36C08K2003/0856C08K2003/2241
Inventor 梁欣
Owner 北京天诚宇新材料技术有限公司
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