Methodology for assessing tightness of the pipeline fitting valves based on results of the rough surfaces simulation

The paper considers an approach to assessing tightness of the rough metal surfaces of the pipeline fitting valves. The technical idea is based on using a profilogram of the sealing surface and the experimentally obtained roughness and waviness parameters to create a roughness model reflecting statistical properties of the machined surfaces. An original approach is proposed to simulate the rough surfaces based on generation of the high-frequency oscillations, and to simulate waviness – the low-frequency oscillations with an amplitude higher than the roughness amplitude. The law of probability distribution, autocorrelation functions and spectral densities are used to prove statistical similarity in the resulting random field and the microgeometric parameters. The paper shows that it becomes possible having the sealing surfaces profilograms and without using a full-scale experiment to assess tightness of the pipeline fitting valve assemblies.
EDN: SFBMMJ, https://elibrary/sfbmmj

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