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Method for strengthening corrosion resistance of pipeline elbow

A pipeline elbow and corrosion resistance technology, which is applied in coating, metal material coating process, etc., can solve the problems of anti-erosion and wear, achieve accurate anti-erosion enhancement, superior production environment, and reduce corrosion-resistant materials. The effect of material loss

Pending Publication Date: 2020-11-20
UNIV OF SHANGHAI FOR SCI & TECH
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  • Description
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Problems solved by technology

[0009] In order to improve the problem of anti-erosion and wear of oil and gas transportation pipeline elbows, methods such as wear-resistant coating glue, wear-resistant repair agent, and wear-resistant bushing can be used for pre-protection

Method used

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  • Method for strengthening corrosion resistance of pipeline elbow
  • Method for strengthening corrosion resistance of pipeline elbow
  • Method for strengthening corrosion resistance of pipeline elbow

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Embodiment

[0050] A method for strengthening the corrosion resistance of pipeline elbows, directly performing laser cladding on the inner wall of the elbows to enhance the erosion resistance, the method includes the following steps:

[0051] (1) Obtain the distribution data of the corrosion-prone position of the pipe elbow;

[0052] (1-1) Determine the actual size of each part of the pipe elbow, specifically including pipe diameter D = 24cm, bending radius R = 36cm, upstream and downstream length L 1 = L 2 =120cm;

[0053] (1-2) Use Pro / e 3D software to establish a 3D model of the elbow according to the actual measured data;

[0054] (1-3) Use fluent software to mesh the elbow model, use finite element software to mesh the elbow model, and find out the areas with serious erosion and wear on the inner surface of the elbow, so as to guide the laser cladding parts of the actual workpiece selection, set boundary conditions, calculate stability and convergence conditions, and finally carry...

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Abstract

The invention relates to a method for strengthening corrosion resistance of a pipeline elbow. The method includes the following steps that (1) easy-to-corrode position distribution data of the pipeline elbow are acquired; (2) the easy-to-corrode positions of the elbow are pretreated; (3) laser cladding is performed in the pretreated positions; and (4) the positions subjected to laser cladding is machined, so that the surface precision of the pipeline elbow meets the standard, and the corrosion resistance of the pipeline elbow is strengthened. Compared with the prior art, the method has the advantages that the cladding layer which is flat in surface and good in metallurgical bonding is produced and the like.

Description

technical field [0001] The invention relates to the field of pipeline elbow anticorrosion, in particular to a method for strengthening the corrosion resistance of pipeline elbows. Background technique [0002] For oil and gas chemical enterprises, the annual pipeline maintenance and replacement cost of a unit can reach millions. In the transportation system, the oil and gas pipeline elbow is the most easily damaged part. Compared with other parts of the overall pipe section, the elbow bears Erosion and pressure are more severe. At the pipe elbow, due to the change of the fluid direction, the flow velocity and pressure of the fluid will change suddenly, and the instantaneous pressure impact force will increase, which will easily cause erosion, even perforation, rupture and other accidents, which will endanger the safety of production and operation. In order to improve the reliability of equipment and ensure the safety of production and operation activities, it is more urgent...

Claims

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Application Information

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IPC IPC(8): C23C24/10C22C38/02C22C38/04C22C38/44C22C38/54
CPCC23C24/106C22C38/02C22C38/04C22C38/44C22C38/54
Inventor 孙首群滕烁焦玉格范秋鹏许平顺房磊王杰李凯峰师晓开
Owner UNIV OF SHANGHAI FOR SCI & TECH
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