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Reliability-based evaluation method and device for residual life of tank floor corrosion

A storage tank bottom plate and reliability technology, which is applied in the field of reliability-based residual life evaluation of tank bottom plate corrosion, and achieves the effects of flexible statistical characteristics and accurate prediction results.

Active Publication Date: 2022-07-08
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0004] The invention provides a reliability-based method and device for evaluating the remaining life of storage tank bottom corrosion, which is used to solve the problem of large errors between the prediction results and the actual conditions in the prior art

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  • Reliability-based evaluation method and device for residual life of tank floor corrosion
  • Reliability-based evaluation method and device for residual life of tank floor corrosion

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Embodiment Construction

[0023] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments. The following examples are intended to illustrate the present invention, but not to limit the scope of the present invention.

[0024] figure 1 Shown is a reliability-based method for evaluating the corrosion residual life of a tank bottom plate provided by an embodiment of the present invention, including:

[0025] S11. Acquire a data set of corrosion depth on the bottom plate of the target storage tank.

[0026] Regarding step S11, it should be noted that, in the embodiment of the present invention, the current storage tank bottom plate is not integrally formed, but is formed by welding a plurality of plates. In this regard, in the corrosion depth test process in this embodiment, the plate is used as the detection area, detection points are set on each detection area, and the current thickness of each detection poin...

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Abstract

An embodiment of the present invention provides a reliability-based method and device for evaluating the corrosion residual life of a tank bottom plate. The method includes: acquiring a corrosion depth data set on a target storage tank bottom plate; according to the corrosion depth data set and a preset obtain the scale parameters and position parameters corresponding to the bottom plate of the target storage tank; obtain the minimum allowable bottom plate thickness corresponding to the bottom plate of the target storage tank, the current thickness and reliability corresponding to the maximum corrosion depth in the corrosion depth data set parameters; according to the scale parameters, position parameters, minimum allowable bottom plate thickness, current thickness, reliability parameters and preset evaluation formulas, the remaining life value corresponding to the target tank bottom plate is obtained and displayed, so as to realize more flexible statistical characteristics, The prediction results are more accurate.

Description

technical field [0001] The invention relates to the technical field of petroleum storage tank safety, in particular to a reliability-based method and device for evaluating the residual life of corrosion of the bottom plate of a storage tank. Background technique [0002] Corrosion of tank floor is one of the main reasons for tank failure. According to statistics, the corrosion of the bottom plate accounts for 76.4% of the tank outage accidents caused by the leakage of crude oil storage tanks. The corrosion of tank floor includes general corrosion, regional corrosion and localized pitting corrosion. The average corrosion rate data, which is important for measuring uniform corrosion, is of little significance in the evaluation of remaining tank life because, for the tank floor, the life of the tank depends on the deepest pitting or cracking, not on the Overall thinning of wall thickness. The local corrosion of the tank floor can provide a scientific basis for the corrosion ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N17/00G01B21/08
CPCG01N17/00G01B21/08Y02E30/30
Inventor 石磊王晓霖王勇李明孙宝翔吕高峰
Owner CHINA PETROLEUM & CHEM CORP
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