3. Selection process of bursting discs:
(1) Data collection:
- System maximum working pressure, design bursting pressure, temperature range.
- Medium composition, phase state, corrosiveness, cleanliness.
- Installation location space restrictions and regulatory standards (such as ASME, API, GB/T 567, etc.).
(2) Selection of bursting disc type:
- Select the type of bursting disc according to the medium and pressure (such as the reverse arch type is suitable for high-pressure impurity-containing media).
- Confirm whether additional functions are required: such as discharge volume indicator, debris capture device.
(3) Material selection of bursting disc:
| Medium characteristics | Recommended materials |
| Ordinary gas/liquid | 316L stainless steel |
| Strong acid (such as sulfuric acid, hydrochloric acid) | Hastelloy C-276, Tantalum |
| High temperature steam (＞300℃) | Inconel 625 |
(4) Verification and testing of bursting disc:
- Require the supplier to provide a bursting pressure test report (the test medium and temperature must be indicated).
- Considering batch differences, it is recommended to reserve a bursting pressure tolerance of ±5%.
4. Notes on installation and maintenance of bursting discs:
- Installation direction: The reverse arch bursting disc should be installed in the direction marked by the arrow to avoid failure due to reverse pressure.
- Clamp matching: Ensure that the clamp is compatible with the bursting disc model and the sealing surface is not damaged.
- Regular inspection: In a corrosive environment, it is recommended to check the surface condition every 6 months.
5. Common selection errors and avoidance:
Ignoring the impact of back pressure: Failure to select a back pressure resistant bursting disc leads to premature rupture.
Insufficient material compatibility: Medium corrosion shortens the life of the bursting disc.
Mislabeling of pressure parameters: Failure to consider the correction of burst pressure due to temperature (burst pressure usually decreases at high temperature).
6. Case analysis:
Case 1: Overpressure protection of reactor in chemical plant:
- Medium: Chlorine (strongly corrosive).
- Pressure: Design burst pressure 2.5MPa, working temperature 80℃.
- Selection: reverse arch bursting disc, material Hastelloy C-276, with polytetrafluoroethylene coating.
Case 2: Natural gas pipeline pressure relief:
- Medium: Natural gas containing trace amounts of hydrogen sulfide.
- Pressure: Burst pressure 10MPa, back pressure resistance required.
- Selection: Reverse arch bursting disc, material Inconel 625.
All matters needing attention in the selection of bursting disc products have been updated. If you have more different opinions or want to know more about the product news, you can contact us at any time.
