A method for testing the local bending pressure bearing performance of pipelines
A test method and pipeline technology, applied in the testing of mechanical parts, the use of stable bending force to test the strength of materials, the testing of machine/structural parts, etc. Long and other problems, to achieve the effect of easy testing process
Active Publication Date: 2018-03-02
BC P INC CHINA NAT PETROLEUM CORP +2
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Problems solved by technology
[0003] In the prior art, it is difficult to test the pressure-bearing performance of a thick-walled pipe with a large diameter under the joint action of bending moment and hydrostatic pressure in the pressure chamber, specifically, it is difficult to apply a huge bending moment to the pipe, and the pressure of the pressure chamber The size determines that the size of the thick-walled pipe specimen with large diameter cannot be too long
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[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0031] An embodiment of the present invention provides a method for testing the local bending pressure bearing performance of a pipeline, such as figure 1 As shown, the method includes:
[0032] Step 101: According to the size of the pipeline, determine the local defect required for the equivalent bending moment of the pipeline bending deformatio...
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The invention relates to the technical field of pressure chamber testing, especially to a testing method for a pressure-bearing performance of local bending of a pipeline. The method comprises: according to a dimension of a pipeline, local defect needed by an equivalent bending moment of pipeline bending deformation during a deep water pavement process is determined, wherein the local defect is rectangular slot; according to the local defect, defect processing is carried out on a pipeline test piece; the pipeline test piece is placed in a deepwater pressure chamber to carry out pressure bearing testing, strain data of the pipeline test piece are collected by simulating a combined effect, exerted on the pipeline, of a hydrostatic pressure and a bending load during the deep water pavement process, and a bending moment facing the inside the pipeline test piece is generated at one side, with the rectangular slot, of the pipeline test piece during the pressure bearing experiment; and on the basis of the strain data, pressure bearing strength data of the pipeline are obtained. According to the invention, the bending moment effect exerted on the pipeline in a bending state is simulated by setting the local defect on the pipeline test piece; a problem of limited pressure chamber space is solved by using the equivalent bending moment way; and testing of the pressure bearing performance in a pipeline bending state is realized.
Description
technical field [0001] The invention relates to the technical field of pressure chamber testing, in particular to a method for testing the local bending pressure bearing performance of pipelines. Background technique [0002] During the laying of deepwater pipelines, due to the joint action of bending moment, hydrostatic pressure and tension on the vertical bend section, the bending moment and hydrostatic pressure are the control loads, and the pipeline is prone to damage under its action. The safety of marine pipeline laying can be verified by conducting physical tests through pressure chambers. [0003] In the prior art, it is difficult to test the pressure-bearing performance of a thick-walled pipe with a large diameter under the joint action of bending moment and hydrostatic pressure in the pressure chamber, specifically, it is difficult to apply a huge bending moment to the pipe, and the pressure of the pressure chamber The size determines that the size of the thick-wa...
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IPC IPC(8): G01M13/00G01N3/20G01N1/32
CPCG01M13/00G01N1/32G01N3/20
Inventor 徐爽曹先凡姚志广赵开龙刘振纹赵静
Owner BC P INC CHINA NAT PETROLEUM CORP