Method and device for testing mechanical parameters of thin-walled pipe fitting

Abstract

The invention discloses a method and device for testing mechanical parameters of a thin-walled pipe fitting. The method is characterized by comprising the following steps: slowly filling high-pressure liquid into the thin-walled pipe fitting of which an outer wall is attached with a strain gage by utilizing a high-pressure pump, and recording the axial and peripheral strain of the outer wall of the thin-walled pipe fitting in the loading and unloading processes by adopting a strain meter; performing linear fitting on the test data by using a least square method, and accurately obtaining the yield strength, the elasticity modulus, the Poisson's ratio, the internal pressure-resistant yield strength and the internal pressure-resistant burst strength of the thin-walled pipe fitting based on a mechanics principle for testing the mechanical parameters of the thin-walled pipe fitting as well as an internal pressure-axial strain curve and an internal pressure-peripheral strain curve obtained through fitting. The device is simple in structure and low in manufacturing cost and is suitable for testing and researching the mechanical parameters of the thin-walled pipe fitting.

Description

technical field [0001] The invention relates to the field of testing the mechanical parameters of thin-walled pipe fittings, in particular to a method and device for testing the mechanical parameters of thin-walled pipe fittings. Background technique [0002] With the continuous deepening of oil and gas exploration and development in my country, the environment faced by oil and gas exploitation is getting worse and worse, especially the successive emergence of highly acidic oil and gas fields, making various thin-walled pipe fittings widely used in the field of oil and natural gas, such as transportation belts Oil, gas, water and other liquid chemical flat bimetallic composite pipes (a new type of anti-corrosion pipe fittings, whose inner pipe is thin-walled stainless steel pipe) with different pressures, the performance of which directly affects the safety of pipeline transportation and the overall delivery capacity. Of course, in order to ensure safety under different worki...

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to provide a method and device for testing the mechanical parameters of thin-walled pipe fittings, so as to solve the problem that the prior art methods cannot accurately measure the mechanical parameters of thin-walled pipe fittings, and to simplify the complexity of the testing process while achieving the above-mentioned purpose. Reduce test system cost

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