Method and system for predicting uniform corrosion residual life of refining device pressure pipeline

Abstract

The invention discloses a method and system for predicting the residual life of uniform corrosion of a pressure pipeline of a refining device, and relates to the technical field of equipment management. The method comprises the steps that firstly, the pressure design wall thickness is calculated according to a strength formula; then, the calculated wall thickness is obtained based on the pressuredesign wall thickness, the corrosion allowance and the pipeline wall thickness negative deviation; a corresponding Sch number and a wall thickness value are selected upwards according to SH / T 3405 toobtain an original design thickness; and finally, the residual life of the pressure pipeline is calculated on the basis of the data. According to the scheme, the method for calculating the corrosion residual life of the uniform corrosion pressure pipeline under the condition of complete lack of data is created for the condition of incomplete basic data or incomplete thickness measurement management of some refinery enterprises, and based on different data integrity degrees of different refinery enterprises, the prediction calculation of the residual life of the uniform corrosion of the pressure pipeline under different data conditions is realized, the dependence of the prior art on data is greatly simplified, and the practical application is more convenient.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of equipment management, and specifically relate to a method and system for predicting the remaining service life of uniform corrosion of a pressure pipeline of a refining and chemical device. Background technique [0002] In recent years, with the diversification and inferiority of crude oil processed by refining and chemical enterprises, the corrosion problem of refining and chemical equipment and pipelines has become increasingly prominent. Through the evaluation, countermeasures were taken to upgrade the material of the equipment and pipelines that are not suitable for the deteriorated crude oil, so as to achieve better corrosion prevention effect. In the prior art, the selection of equipment and pipeline materials is generally based on the high-sulfur and high-acid material selection guidelines, as well as the API 581 standard, which is uniform for high-temperature sulfur corro...

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Problems solved by technology

[0006] On the one hand, the present invention provides a method for predicting the remaining life of uniform corrosion of pressure pipes in refining and chemical equipment, which is mainly aimed at enterprises with incomplete basic data or imperfect thickness measurement management, and solves the problem that the remaining life of uniform corrosion cannot be predicted due to lack of data. Said method comprises the following steps:

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