How to determine the burst pressure of a rupture disc?
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I’m a new member. I’d like to ask how to determine the burst pressure of a blast disc Our factory manufactures a starch silo that operates at atmospheric pressure, using starch powder as the medium. An explosion vent needs to be added; I need to purchase a rupture disc, but the burst pressure isn’t specified. How can I determine the burst pressure? Thank you!
It’s determined by the manufacturer – the voltage tolerance per chip.
LZ can refer to the burst pressure of safety valves specified in Section 6 of \"HG/T 20570.3-95 – Installation and Selection of Safety Valves\".
Starch silo, operates at atmospheric pressure, with starch powder as the medium. An explosion vent needs to be added; I need to purchase a rupture disc. Under normal pressure, a rupture disc is not necessary because the pressure on the inside and outside is the same. If it is to function as a rupture device after installation, there must be a pressure difference in order for it to trigger rupture. Therefore, the pressure setting for the rupture disc cannot be set at atmospheric pressure – it must be set above atmospheric pressure.
The pressure setting for the burst disc can be set at 4 kPa
Thank you all. I asked the American engineers today, and they told me that their burst pressure is 1.0 psig at 72°F (=0.00689 MPa). Do you think this pressure is too low? Does the blasting referred to here mean pressure difference blasting or overheating blasting?
Set to 1.25 times the working pressure
I have no experience with LZ’s equipment, but here are two principles for selecting rupture disks for pressure vessels that might be useful: 1. When installing rupture disk devices in fixed pressure vessels, it is essential to ensure that the designed rupture pressure pb does not exceed the design pressure p of the vessel, and that the minimum designed rupture pressure pbmin is not less than 1.05 times the vessel’s maximum operating pressure pw. 2. The discharge capacity of the burst disc must be no less than the safe discharge capacity of the pressure vessel. Additionally, it is recommended to consult the manufacturers of rupture discs, as they should be able to provide relevant information. For reference! This post was last edited by clguan on 2009-2-5 20:07.]
The set pressure of the safety valve can be used as a reference
The manufacturer, Shenyang Aerospace Xinguang, also requires the blasting pressure to be provided in order to select the appropriate model – it’s really frustrating!
Just check the standards and make your choice.
Bro, what you selected for your silo isn’t a burst disc but an explosion-proof plate, a large-sized one designed to prevent dust explosions; it’s not meant for use with gases and liquids like burst discs are. The set pressure of the explosion-proof plate is very low, and the U.S. made the right choice. This pressure value represents the pressure difference; dust explosions can generate enormous explosive forces in an instant. Therefore, it is necessary to release pressure at an early stage when it is still low, otherwise severe secondary dust explosions could occur!
Since the operation is at atmospheric pressure, the detonation pressure requirement specified by the foreign party: 0.00689 MPa(g) at 22°C, should be fine.
I would like to ask if there are any specifications or documents related to explosion-proof panels on the 13th floor. A silo at normal pressure is connected to the atmosphere, right? Otherwise, what would happen if negative pressure occurred? Do devices that are connected to the atmosphere also have explosion-proof discs or plates?
15,000 pascals is generally sufficient; most rupture discs used in the dust removal industry operate at this pressure level
0.01 MPa is sufficient
To prevent dust explosions, what LZ is referring to is probably explosion-proof panels, which are available in stock. The fixed pressure is 0.01 MPa, and the rectangular dimensions vary depending on the manufacturer