If you are in an industrial plant, you should always remember things about rupture discs. Even if you already have a basic knowledge about rupture discs, it wouldn’t hurt spending some time reviewing. In the end, this can mean the difference between protecting pipelines and vessels from damage and costly system downtime.
Here are the things to remember about rupture disc:
It is a type of pressure-relief device
Rupture discs are considered a non-reclosing type of pressure-relief device. Ultimately, it is designed to protect the vessels, piping and other pressure-containing modules from the vacuum and/or excessive pressure.
As soon as the rupture disc is burst out, the entire system or vessel pressure will be released. In this way, the system or vessel will continue its function. With this, it is important to be mindful of replacing burst out rupture discs.
It has many advantages
Rupture discs have many advantages to include the following:
- Rupture discs are designed to react immediately to relieve the spikes of pressure.
- To protect the vessels, the rupture discs are installed with multiple or single relief devices.
- Rupture discs are simple, reliable and responsive because it has no moving parts.
- Rupture discs are preferred more than other pressure-relieving devices because of its lightweight property.
- More importantly, rupture discs are used for both liquid and gas handling.
- There is no maintenance cost associated with rupture discs.
It has also disadvantages
You must be aware of its disadvantages so you will know what to expect. The disadvantages of rupture discs include the following:
- It was mentioned earlier that it is important to be mindful of replacing bust out rupture discs. This means that once the rupture disc bursts out, you need to buy a replacement immediately.
- Speaking of replacing a rupture disc, it is a must to shut down the system during the entire process. This means downtime.
- When installing a replacement, care is required because a small scratch can damage the disc leading to malfunction. Aside from care, you should also take into consideration the bolt torque as it can affect the pressure.
Temperature affects its success
You should keep in mind that the burst pressure varies according to the temperature. If the operating liquid’s temperature increases, the disc temperature also increases. This change will decrease the burst pressure, which will cause premature rupture disc failure.
There are different types of rupture discs
Rupture discs come in different types. Types include the following:
- Forward-acting: the rupture disc dome is designed to face away from the process.
- Reverse-acting: the rupture disc dome is designed to face the process thereby enabling high operating pressures and ratio.
- Compact: this is typically very small of forward-acting or reverse-acting rupture disc. A compact rupture disc is bonded adhesively or soldered to the holder or housing.
There are different rupture disc accessories
For different applications, you can consider various rupture disc accessories like alarm monitors (raises an alarm when the rupture disc leaks or opens), heat shields (reduces the temperature act), and baffle plates (deflect process discharge away).