Abstract
Rupture discs, also called bursting discs, are widely used in pressure vessels, pressure equipment, and pressure piping in process industries, such as nuclear power, fire protection, and petrochemical industries. To explore the relationship between the burst pressure of reverse-acting rupture discs and their production, two common manufacturing methods, air pressure moulding and hydraulic moulding, were compared in this study. Reverse-acting rupture discs that complied with the form recommended by API 520-2014 were prepared with four release diameters, and burst pressure tests were carried out. These results showed an obvious negative correlation between the forming pressure of rupture discs and their actual burst pressure for all experimental samples. Further study showed that the main reason for this correlation was a reduction in thickness at the top of the rupture disc caused by large plastic deformation during compression moulding. To explore the relationship between the thickness reduction effect and moulding method, this study defined the “relative ratio of thickness reduction” and concluded that the effect of decreasing the thickness of the rupture disc was more obvious for rupture disc substrates with less flexural rigidity. The above conclusions have important significance for guiding the control of the burst pressure of rupture discs.
Highlights
Rupture discs are important protective devices used to safeguard pressure vessels and fluid pipelines from overpressure hazards; they have been widely used in major industrial systems and production facilities [1,2,3,4]
Rupture discs and pressure relief valves (PRV) are both overpressure relief devices applied to high-pressure equipment, but the application scenarios of the two are different
According to the above experimental methods, these burst pressure tests were all performed on batches of rupture discs, the test data were classified according to the shape, forming pressure and material type of the rupture discs, and the specific experimental data analysis was performed
Summary
Rupture discs are important protective devices used to safeguard pressure vessels and fluid pipelines from overpressure hazards; they have been widely used in major industrial systems and production facilities [1,2,3,4]. To facilitate practical applications of rupture discs, the typical industrial standard [9,10] emphasizes the pressure limitation of the entire pressure relief system, and most researchers and engineers propose specific indicators of the discharge effect of rupture discs under such rated conditions. With the application of the finite element numerical simulation method in design engineering, great progress has been made to develop calculation models of the burst pressure of rupture discs [23,24]. Few studies have been performed on the effect of production conditions on the burst pressure of rupture discs. There have been few systematic studies on the relationship between the burst pressure of rupture discs or the rupture effects and the production process parameters. Forward-looking guidance and opinions are given about the influence of the actual production mode of rupture discs on their service performance
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