In-service pipeline combined load simulation test method and system

Abstract

The invention provides an in-service pipeline combined load simulation test method and system and relates to the technical field of pipeline systems. The method comprises the following steps of: firstly fixing a pipeline on an external load system; after water injection and exhausting, pressurizing by adopting a booster pump, then applying a bending load and an axial load by virtue of an external load system, and testing the loading capacity and failure mode of the pipeline when a steel tube is under the combined action of the internal pressure, the bending load and the axial load. The in-service pipeline combined load simulation test system provided by the invention has the function of simulating the condition that the pipeline bears three loads, namely the internal pressure, the bending load and the axial load, and is capable of testing the failure of a defect-containing pipeline or a repaired pipeline under the action of a single load or a combined load.

Description

technical field [0001] The invention relates to a composite load simulation test method and system for in-service pipelines, and relates to the technical field of oil and gas pipeline systems. Background technique [0002] In the research of residual strength evaluation method for pipelines with defects such as corrosion, spiral weld defects, girth weld defects, and sags, it is necessary to carry out failure simulation tests of defective pipelines under composite loads to verify the evaluation results and carry out the evaluation model. fix. At the same time, after the defect repair is completed, it is also necessary to evaluate and verify the repair effect. [0003] CN102023118A discloses a method for performing a composite load test on a solid expansion pipe, CN2709972Y discloses a linear load simulation test method, and GB2458293A discloses a method and device for testing the strength and pressure of a pipe component, but none of them discloses that the test pipeline is ...

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Problems solved by technology

[0003] CN102023118A discloses a method for performing a composite load test on a solid expansion pipe, CN2709972Y discloses a linear load simulation test method, and GB2458293A discloses a method and device for testing the strength and pressure of a pipe component, but none of them discloses the test pipeline in The pressure bearing capacity and failure mode of the pipeline under the combined action of internal pressure, bending load and axial load

[0004] The current steel pipe hydrostatic blasting test system can only complete the failure verification test of the pipeline under the action of internal pressure, and does not have the ability to carry out the failure verification test under the joint action of internal pressure, bending load and axial load

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