Benefits of
High Precision Rupture Discs
Elfab rupture discs allow you to work the process to higher
pressures at a given disc set pressure. Direct benefits include:
- Shorter process times and tighter safety margins.
- Possible consolidation of different rupture discs type
onsite for better inventory management.
Example - The following are typical parameters for a 100
psig rupture disc:
| Rupture Disc Specification |
Elfab |
Zero MDR |
5% MDR |
10% MDR |
| Lowest Possible
Marked Burst Pressure psig1 |
100 |
100 |
95 |
90 |
| Burst Pressure
tolerance +/-2 |
3% |
5% |
5% |
5% |
| Minimum Burst
Pressure psig |
97 |
95 |
90 |
85 |
| Operating Ratio
%3 |
92 |
90 |
90 |
90 |
| Maximum Working
Pressure psig |
92 |
90 |
85.5 |
81 |
1
Marked Burst- With Zero Manufacturing Design Range,
the Marked Burst is the same as the Ordered burst. With
10% Manufacturing Design Range, the Marked Burst is the
actual test burst average. This average must lie between
the specified limits:
-
With Zero MDR, a rupture disc ordered
at 100 psig +/- 5% @68F will have a Marked Burst on disc
tag of 100psig +/- 5%@ 68F.
-
With 10% MDR, a rupture disc ordered
at 100 psig +/-5%@ 68F. could have a Marked Burst on
disc tag of 90 to 110 psig +/- 5% @68F.
2
This is the limit of the burst pressure of the rupture disc,
normally stated as a plus or minus percentage. Refer to ASME
VIII Division 1 Section UG127.
3
This is the maximum recommended pressure that the rupture
disc should be subjected to in service. Above this figure
the disc will fatigue and give a reduced service life. (Shown
as a percentage of the Marked Burst)
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