Defect quantified comprehensive safety judgment method for on-service pressure container

Abstract

The invention discloses a defect quantified comprehensive safety judgment method for an on-service pressure container. The method comprises the steps of detecting a defect of the on-service pressure container by a magnetic memory detection method, and quantifying the defect by a calculation formula; performing planar defect breakage evaluation and planar defect fatigue evaluation on the on-service pressure container according to a magnetic memory detection result; constructing a comprehensive judgment matrix by a fuzzy comprehensive judgment system, calculating a total damage rate according to the damage rate, caused by each ineffectiveness factor, on the pressure container and a weight of the influences on the safety of the pressure container, determining a relation of the influences, and making comprehensive safety judgment. The defect quantified comprehensive safety judgment method for the on-service pressure container is high in reliability and high in operability, and an evaluation result can objectively and really reflect actual situations of engineering.

Description

technical field [0001] The invention belongs to the technical field of safety evaluation of pressure vessels, and in particular relates to a quantitative and comprehensive safety evaluation method for in-service pressure vessel defects. Background technique [0002] The pressure vessel is a special pressure-bearing equipment with explosion hazard. It has the characteristics of high temperature, high pressure, flammability, explosion, and complicated process. Once an explosion or leakage occurs, the consequences will be extremely disastrous. Therefore, the safety and reliability of pressure vessels Judgment is even more important. Compared with other methods, magnetic memory testing is used to quantify defects, and then the comprehensive safety evaluation of pressure vessels has distinctive features: first, as a new non-destructive testing method, magnetic memory testing is comprehensive and meticulous, and does not Affected by whether it is in operation or not, the operatio...

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Problems solved by technology

[0004] The purpose of the embodiments of the present invention is to provide a quantitative comprehensive safety assessment method for in-service pressure vessel defects, which aims to solve the problems existing in the existing assessment methods, such as the difficulty in detecting the defects of in-service pressure vessels, the inaccurate detection results, and the inability to dynamically monitor the changing trend of disasters , The evaluation process is complicated and the evaluation results do not match the actual problems

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