Method for inspecting gas tightness of argon pipelines of molten steel tank

A technology of argon gas tube and molten steel tank, which is applied in the direction of detecting the appearance of fluid at the leak point and using liquid/vacuum degree for liquid tightness measurement, etc. High, easy to observe effect

Inactive Publication Date: 2011-07-06
WUXI JULI HEAVY IND OFF
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  • Abstract
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  • Claims
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a method for testing the airtightness of the argon pipeline of the molten steel tank. equipment cost

Method used

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  • Method for inspecting gas tightness of argon pipelines of molten steel tank
  • Method for inspecting gas tightness of argon pipelines of molten steel tank

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Experimental program
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Embodiment Construction

[0009] figure 1 Among them, 1 is the steel pipe, 2 is the fillet weld, 3 is the butt weld, and 4 is the threaded joint, among which 2, 3, and 4 are the air tightness inspection parts of the pipeline.

[0010] The following is a detailed description of the inspection process:

[0011] Air pressure test: in the part to be tested of the argon pipeline of the molten steel tank, such as figure 1 Apply clear water to 2, 3, and 4 of the test, and then apply purple litmus reagent to the area to be tested, and then inject high-pressure CO with a concentration ≥ 90% into the pipeline. 2 Gas, if the purple litmus reagent is found to turn red, it can be judged that the airtightness here is poor, which is because the high concentration of carbon dioxide gas escaping here reacts with water to produce carbonic acid, which turns the litmus red.

[0012] Hydrostatic test: in the part to be tested of the argon pipeline of the molten steel tank, such as figure 1 Apply purple litmus reagent to...

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Abstract

The invention provides a method for inspecting gas tightness of argon pipelines of a molten steel tank, which is simple, can effectively solve the problems that the existing air pressure test or hydrostatic test is not accurate and can reduce the equipment cost. The method can be realized by the following technical scheme: pressure gas or pressure water is introduced in the argon pipeline of the molten steel tank; the method is characterized in that before the pressure gas or the pressure water is introduced in the argon pipeline of the molten steel tank, purple litmus reagent is coated at a to-be-detected part of the argon pipeline of the molten steel tank, wherein the pressure gas is CO2 gas and the pressure water is acid pressure water, and if the purple litmus reagent of the detection part of the pipeline goes red, the result indicates that the gas tightness of the detection part is poor.

Description

technical field [0001] The invention relates to a method for inspecting the airtightness of communication components, more specifically, the invention relates to a method for inspecting the airtightness of an argon pipeline of a molten steel tank. Background technique [0002] The argon pipeline of the molten steel tank is one of the important components of the molten steel tank. It is mainly used to blow argon to the molten steel contained in the molten steel tank, so as to stir and protect the molten steel and create a good kinetic conditions. Therefore, the airtightness of the argon pipeline of the molten steel tank is directly related to the internal quality of the steel after smelting. [0003] The traditional air tightness test mainly includes air pressure test and water pressure test. The air pressure test is a method of manually applying soapy water to the welded joints and thread seals when the pipeline is fed with compressed air, and directly checking whether the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M3/04
Inventor 胡明华王凤良
Owner WUXI JULI HEAVY IND OFF
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