Experimental Research on the Gasket Parameters of Flange Sealing Structure Based on Leakage Rate

doi:10.3901/JME.2020.21.168

Journal of Mechanical Engineering ›› 2020, Vol. 56 ›› Issue (21): 168-176.doi: 10.3901/JME.2020.21.168

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Experimental Research on the Gasket Parameters of Flange Sealing Structure Based on Leakage Rate

LIU Yan^1,2,3, CHEN Xuedong², FAN Zhichao², WANG Lu², XUE Jilin²

1. College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310023;
2. National Technical Research Center on Safety Engineering of Pressure Vessel, Hefei General Machinery Research Institute, Hefei 230031;
3. Engineering Research Center of Process Equipment and Remanufacturing, Ministry of Education, Zhejiang University of Technology, Hangzhou 310023

Received:2020-04-13 Revised:2020-07-02 Online:2020-11-05 Published:2020-12-19

Abstract

Abstract: In respect of the pressure vessels, yield factor y and maintenance factor m are two significant gasket parameters for flange design. The values of y and m given in the current ASME VIII code are empirical values and not related to the leakage rate. The shortages of current standard test methods for gasket parameters of flange sealing structure based on leakage rate are analyzed. The sealing performance test of graphite spiral wound gasket under different medium pressure and different loading/unloading cycles is carried out, a more reasonable and practical test method for gasket parameters y and m is proposed. By fitting the relationship between the leakage rate of different initial gasket surface pressure and gasket maintenance factor m, the values of y and m that meet the requirements of different tightness class are obtained, and the values of y and m are optimized to make it more convenient for engineering application. The new gasket parameters test method considers the correlation between y and m, which can reflect the gasket characteristics more accurately and comprehensively, providing support for the design of flange sealing structure based on leakage rate and reducing the leakage rate of petrochemical plant.

Key words: flange sealing structure, leakage rate, gasket parameters, graphite spiral wound gasket

CLC Number:

TB42

LIU Yan, CHEN Xuedong, FAN Zhichao, WANG Lu, XUE Jilin. Experimental Research on the Gasket Parameters of Flange Sealing Structure Based on Leakage Rate[J]. Journal of Mechanical Engineering, 2020, 56(21): 168-176.

References

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Experimental Research on the Gasket Parameters of Flange Sealing Structure Based on Leakage Rate

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