What Is a Rupture Disc?
Rupture disc safety device
Bursting disc
- Chinese name
- Bursting disc
- Foreign name
- rupture disc
- surroundings
- Pressure vessels and pipelines
- Types of
- Explosion-proof pressure relief device
- Use
- Guarantee the safety of people's lives and national property
- Rupture disc safety device
- Non-reclosed pressure relief device consisting of rupture disc (or rupture disc assembly) and holder (or support ring). Under the set burst pressure difference, when the pressure difference between the two sides of the bursting disc reaches a preset value, the bursting disc will immediately act (rupture or fall off) and release the fluid medium.
- Bursting disc It can blast under the specified temperature and pressure, releasing pressure.
- The bursting disc device is composed of two parts: a bursting disc and a holder. Bursting disc is a component that releases pressure at a specified burst pressure and temperature, and a holder is an auxiliary component for holding and holding a bursting disc at an appropriate position of a container.
- The bursting disc safety device has the advantages of simple structure, sensitivity, accuracy, no leakage, and strong discharge capacity. It can work reliably in viscous, high temperature, low temperature, and corrosive environments. It is also an ideal safety device for ultra-high pressure vessels.
- Bursting discs are important safety devices to prevent overpressure damage to pressure equipment. They are widely used in chemical, petroleum, light industry, metallurgy, nuclear power, dust removal, fire protection, aviation and other industrial sectors.
- The latest national standard: GB 567-2012 "Bursting Disc Safety Device"
- Bursting disc device is a pressure-relief device that cannot be closed repeatedly. It is started by the static pressure at the inlet and releases the pressure through the rupture of the pressure diaphragm.
- Simply put, it is a one-time pressure relief device. At a set burst temperature, when the pressure difference between the two sides of the burst disc reaches a predetermined value, the burst disc can act (rupture or fall off) and release fluid.
- (1) Suitable for slurry, viscous and corrosive process media, in which case the safety valve does not work
- (1) The working medium in the pressure vessel or pipeline is viscous or easy to crystallize and polymerize, and it is easy to stick or block the safety valve to the safety valve disc and the base;
- (2) The chemical reaction of the materials in the pressure vessel may cause the pressure in the vessel to rise sharply and instantly, and the safety valve cannot open the pressure relief place in time;
- (3) The working medium in the pressure vessel or pipeline is highly toxic gas or expensive gas, and there may be places where the safety valve is used to cause leakage and lead to environmental pollution and waste;
- (4) Places where pressure vessels and pressure pipelines are required to be fully discharged or unhindered when fully discharged;
- (5) Other places that are not suitable for safety valves but are suitable for bursting discs.
- 1. Divided by type
- (1)
- Back pressure : refers to the static pressure at the outlet of the rupture disc device when the rupture disc is blasted or released. If the pressure is lower than atmospheric pressure, it can be called vacuum pressure.
- Back pressure support : refers to the component in the bursting disc device used to prevent the failure of the bursting disc caused by the reverse pressure difference. If the system pressure is below atmospheric, it is often referred to as a vacuum support.
- Batch : Several bursting discs of the same specification are concentrated in a batch and manufactured from the same batch of material, which is called a batch.
- Bursting disc (bursting disc): A pressure relief device that cannot be closed after blasting at a set pressure. When the pressure or vacuum withstand limit is exceeded, the pressure is released to protect the safety of a single device or the entire system.
- Rupture disc assembly (bursting disc assembly): All parts mounted on the holder in order to fulfill the function required by the design
- Bursting disc device (bursting disc device): Non-recloseable pressure relief device controlled by pressure difference and with blasting and relief functions. It is not just a separate rupture disc, but also a suitable rupture disc holder and other components.
- Rupture Disc Holder (Rupture Disc Holder): A component used in a bursting disc device to hold the bursting disc and ensure its performance.
- Bursting pressure : When the system pressure difference rises to a certain value, the bursting disc will open instantly. The system pressure difference at the moment of opening is the burst pressure.
- Coating : A layer of metallic or non-metallic material (non-lined) covering parts of a bursting disc device.
- Burst temperature : The temperature of the system when the burst pressure is reached.
- Ordinary bursting disc (positive arch): When the system is pressurized to exceed the tensile strength (or tension) that the disc material can withstand, the bursting disc will open. Ordinary bursting discs are flat or arched, and the direction of the arch is consistent with the direction of the blasting pressure, that is, the blasting pressure acts on the concave surface of the positive arching rupture disc.
- Drainage: The ability to drain fluid after the rupture disc is opened.
- Blasting plate : The blasting plate is a pressure relief device. When the system is over-pressurized and is about to cause an explosion, the explosion pressure is used to prevent the explosion. When the system pressure reaches the "opening pressure" p value, the bursting plate will instantly open the relief pressure.
- Metal sheet : A metal strip or sheet used to make metal bursting discs.
- Free flow (discharge) area : The equivalent minimum flow cross-section area after excluding the influence of back pressure support and blasting residual components on the flow area.
- IP protection level : It is related to the protection level of sealing to prevent foreign objects (such as dust, moisture, etc.) from entering the electrical equipment or the system.
- Lining : additional sheet or film (non-coated) attached to a metal rupture disc or holder.
- Manufacturing range : The manufacturing range is a pressure range that is determined by the manufacturer and the user according to their needs. The average burst pressure of bursting discs in the same batch must be within this pressure range.
- Maximum operating pressure : refers to the maximum pressure of the system to make the rupture disc work normally without causing excessive wear on the rupture disc. Depending on the type of bursting disc, the maximum operating pressure is generally 50% to 100% of the rated burst pressure. Also commonly referred to as the operating ratio.
- Operating pressure (working pressure): The system pressure when the rupture disc is working normally.
- Operating temperature (operating temperature): The temperature of the system during normal operation of the bursting disc.
- Blasting tolerance : At the same blasting temperature, the actual blasting pressure will have a difference between the maximum and minimum values. Blasting tolerance is the allowable deviation between the actual bursting pressure and the nominal bursting pressure. It is usually expressed as a percentage (or psig). After determining the type, model and burst pressure of the bursting disc, the actual burst pressure must be within the tolerance range.
- Bleed Pressure : The maximum system pressure in a bleed state. (Different from burst pressure)
- Bleed Temperature : The highest system temperature in the bleed state. (Different from blasting temperature)
- Anti-arch rupture disc : The rupture disc whose arch direction is opposite to the direction of pressure, that is, the pressure acts on the convex surface of the rupture disc.
- Composite bursting discs : bursting discs with more than two layers, one of which reduces the pressure on the bursting discs through the structure of holes or gaps to control the bursting pressure. Composite bursting discs can be flat or arched.
- Design burst pressure : The pressure required by the customer or provided by the manufacturer at the same burst temperature when designing the burst disk performance requirements. Can be expressed as minimum or maximum.