A comprehensive monitoring and evaluation method for the safety of in-service metal pipelines and pressure-bearing parts

Abstract

The invention discloses a safety comprehensive monitoring and evaluation method for an in-service metal pipeline and a pressure-containing part. An integrated detection method which combines an ultrasonic thickness measurement method, an electrochemical corrosion detection method and a metal magnetic recording detection method is adopted, safety monitoring accuracy for the in-service metal pipeline and the pressure-containing part is improved, safety state comprehensive evaluation for the in-service metal pipeline and the pressure-containing part is realized, and a safety state development trend for the in-service metal pipeline and the pressure-containing part is predicted. Further, a wireless data transmission technology is adopted, remote monitoring on safety states such as corrosion of the in-service metal pipeline and the pressure-containing part, wall thickness and stress concentration are realized, data storage, analysis and management are realized, and the safety evaluation efficiency for the in-service pipeline is greatly improved.

Description

technical field [0001] The invention relates to a non-destructive testing method, in particular to a comprehensive safety monitoring and evaluation method for in-service metal pipelines and pressure-bearing parts. Background technique [0002] Pipeline transportation is the main mode of transportation for modern oil and natural gas. Because oil and gas pipelines are buried underground and the external environment is harsh, coupled with the influence of medium erosion and medium corrosion inside the pipeline, corrosion, thinning and stress of the pipeline wall occur. Concentration, leading to pipeline rupture and leakage accidents, resulting in significant waste of resources and environmental pollution. Therefore, it is of great practical significance to monitor pipeline corrosion, wall thickness thinning, and stress concentration, and timely discover corrosion points, wall thickness thinning points, and stress concentration points that may cause pipeline rupture and leakage,...

AI Technical Summary

Problems solved by technology

In addition, metal pressure-bearing parts are also prone to corrosion, wear, and stress concentration fatigue damage during service.

At present, the ultrasonic thickness measurement method is usually used to detect the wall thickness, the electrochemical method is used to detect the corrosion, and the metal magnetic memory method is used to detect the stress concentration state, and it is usually necessary to dig the pipeline for manual detection, which is extremely low in detection efficiency and high in cost.

In-service monitoring currently only has a single ultrasonic thickness monitoring or electrochemical corrosion monitoring, and there is no stress concentration state monitoring

The biggest problem at present is that a single detection / monitoring method cannot achieve a comprehensive evaluation of the health status of the pipeline

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