Method for judging aging degree of in-service pipeline material
By obtaining the standard and sample elastic modulus of in-service pipelines, changing the pressure inside the pipe using a natural gas pressure regulation system, and combining the stress-strain relationship, the average elastic modulus E is calculated. This solves the problem of poor applicability of the in-service polyethylene gas pipeline life prediction method and achieves a more accurate assessment of aging degree.
CN121207720APending Publication Date: 2025-12-26HEBEI INST OF SPECIAL EQUIP SUPERVISION & INSPECTION
Patent Information
- Application Number
- CN202511436653.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-09
- Publication Date
- 2025-12-26
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Figure CN121207720A_ABST
Abstract
The embodiment of the invention relates to the technical field of pipe detection, and provides an in-service pipeline material aging degree judgment method which is characterized by comprising the following steps: S1, obtaining a standard elastic modulus of an in-service pipe; s2, measuring an in-service sample taken from the outer wall of the in-service pipeline to obtain a sample elastic modulus of the in-service sample; s3, testing the average elastic modulus E of the in-service pipeline; and S4, according to the E, judging the aging degree of the in-service pipeline material. By means of the technical scheme, the technical problems that in the prior art, an in-service pipeline material service life prediction method is poor in applicability, and the prediction result often has large deviation are solved. An existing natural gas pressure adjusting system is utilized, an in-service pipeline does not need to be cut off, meanwhile, the influence of factors such as material aging and stress relaxation on the elastic modulus can be comprehensively considered, and the aging degree judgment is more accurate.
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Citation Information
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