A high-pressure airtightness test method

Abstract

The invention discloses a high-pressure airtightness test method, which is used for quantitative detection of the high-pressure airtightness of a high-pressure sealing system, in which a certain amount of detection gas is charged into the high-pressure tank, and then water is continuously injected into the high-pressure tank , the gas pressure in the detection system can meet the requirements of the test, and quantitative detection of the detection gas leaked from the high-pressure sealing system under this condition can be used to know the seal leakage of the high-pressure sealing system under the corresponding test conditions. According to the quantitative detection results, not only the design leakage rate of the seal can be verified, so as to verify the rationality and safety of the seal design, but also can be used for leakage detection under variable working conditions, and then the working condition of the seal can be obtained. The corresponding relationship between conditions and leakage, so that the leakage under the working conditions of the seal can be determined, and accurate data support can be provided for the design of the seal and the connecting parts of the seal.

Description

technical field [0001] The invention relates to a high-pressure airtightness test method. Background technique [0002] In nuclear power, thermal power, energy and other industrial sectors, equipment and pipeline flanges usually need to be sealed to form a sealed pressure system. For a pressure system, leakage is absolute, while non-leakage is relative. As long as the sealing leakage of the system meets the maximum allowable leakage rate index determined by factors such as environmental protection, safety and economy, the system can be considered as non-leakage . At present, there are two ways to test the reliability of the seal, one is high-pressure water pressure test, this method can only be used for qualitative testing, and generally only visual inspection can be used to check whether there is leakage; the other method uses low-pressure gas, For example, helium, nitrogen, etc., perform quantitative detection of low-pressure leakage rate. Although this method can achie...

AI Technical Summary

Problems solved by technology

At present, there are two ways to test the reliability of the seal, one is high-pressure water pressure test, this method can only be used for qualitative testing, and generally only visual inspection can be used to check whether there is leakage; the other method uses low-pressure gas, For example, helium, nitrogen, etc., carry out quantitative detection of low-pressure leakage rate. Although this method can realize quantitative inspection, it cannot perform quantitative detection of leakage under high-pressure conditions.

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