Flow corrosion testing device under axial fatigue load of scaling marine pipeline

Abstract

The invention relates to a flow corrosion testing device under axial fatigue load of a scaling marine pipeline. The flow corrosion testing device comprises a water tank 1, a speed regulation water pump 2, a fluid input pipe section 3, fixed supporting flanges 5, a load test pipe fitting 6, a contrast test pipe fitting 7, a load bearing flange 9, an axial tensile-compressive load applying device 10 and a fluid output pipe section 11, wherein the fluid input pipe section 3 is capable of realizing flow diversion of fluid in the water tank 1 sucking through the speed regulation water pump 2 through a first three-way connector; the fluid output pipe section 11 is capable of realizing flow gathering of the fluid flowing into the load test pipe fitting 6 and the contrast test pipe fitting 7 through a second three-way connector; one end of the load test pipe fitting 6 is connected with the fluid input pipe section 3 through the fixed supporting flange 5, and the other end is connected with the fluid output pipe section 11 through the load bearing flange 9; the axial tensile-compressive load applying device 10 is fixedly connected with the load bearing flange 9. According to the flow corrosion testing device under the axial fatigue load of the scaling marine pipeline, disclosed by the invention, the operation environment of a marine pipeline and a vertical pipe during a service period can be simulated.

Description

technical field [0001] The invention relates to a flow corrosion test device under the tension-compression fatigue load of a scaled-scale ocean pipeline, which can realize the joint action of the internal flow field of the scale-scale pipeline test piece and the axial cyclic tension-compression load, and approximate the simulated service period The force situation of riser and submarine pipeline under the flow field in the pipe and axial tension-compression fatigue load, explore the internal corrosion mechanism and fatigue reliability of riser and submarine pipeline under axial tension-compression fatigue load and different flow field conditions, Predict fatigue and corrosion hazard points during pipeline service. Background technique [0002] As the world's demand for energy increases and land-based oil dries up, people are turning their attention to the sea. Since the laying of the first submarine pipeline in the 1940s, the exploration and development technology of offsho...

AI Technical Summary

Problems solved by technology

[0005] Most of the existing fatigue and corrosion test devices are aimed at a single stress field or flow field, and cannot study the fatigue and corrosion behavior of marine pipelines under the coupling of multiple fields

However, some flow corrosion devices under cyclic stress can apply cyclic loads to the specimens in the flow field, but only for metal specimens.

The corrosion conditions of different surfaces of the metal test piece will affect each other, so it cannot be applied to pipelines with isolated inner and outer surfaces, and its flow field conditions cannot simulate the transport medium of ocean pipelines

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