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Reliability-based storage tank bottom plate corrosion residual life evaluation method and device

A storage tank bottom plate and reliability technology, which is applied in the field of reliability-based corrosion remaining life evaluation of storage tank bottom plate, to achieve the effect of flexible statistical characteristics and accurate prediction results

Active Publication Date: 2020-05-08
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 storage tank bottom plate corrosion residual life evaluation method and device
  • Reliability-based storage tank bottom plate corrosion residual life evaluation method and device
  • Reliability-based storage tank bottom plate corrosion residual life evaluation method and device

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Embodiment Construction

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

[0024] figure 1 It shows a reliability-based evaluation method for the remaining corrosion life of storage tank bottom plate provided by an embodiment of the present invention, including:

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

[0026] With regard to step S11, it should be noted that, in the embodiment of the present invention, the bottom plate of the current storage tank is not integrally formed, but is welded by multiple plates. In view of this, 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 thicknes...

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Abstract

The embodiment of the invention provides a reliability-based storage tank bottom plate corrosion residual life evaluation method and device. The method comprises the steps of: acquiring a corrosion depth data set on a target storage tank bottom plate; acquiring a scale parameter and a position parameter corresponding to the target storage tank bottom plate according to the corrosion depth data setand a preset parameter calculation formula; acquiring a minimum allowable bottom plate thickness corresponding to the target storage tank bottom plate, a current thickness corresponding to a maximumcorrosion depth in the corrosion depth data set and a reliability parameter; and according to the scale parameter, the position parameter, the minimum allowable bottom plate thickness, the current thickness, the reliability parameter and a preset evaluation formula, acquiring and displaying a residual life value corresponding to the target storage tank bottom plate, thereby realizing more flexiblestatistical characteristics and more accurate prediction result.

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 remaining corrosion life of a bottom plate of a storage tank. Background technique [0002] Tank floor corrosion is one of the main causes of tank failure. According to statistics, among the storage tank outage accidents caused by leakage of crude oil storage tanks, bottom plate corrosion accounts for 76.4%. The corrosion of tank bottom plate includes general corrosion, regional corrosion and localized pitting corrosion. The average corrosion rate data, which is important to measure uniform corrosion, is not very meaningful in tank remaining life assessment, because for the tank floor, the life of the tank depends on the deepest pitting or cracking, not on the deepest pitting or cracking. Overall reduction in wall thickness. The localized corrosion of the tank bottom can provide a scientific basis f...

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Application Information

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Patent Type & Authority Applications(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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