Production • Processing • Handling
has increased or changed the operating pressure but did not apply the changes to the design of the existing disc. In this circumstance, the disc is doing its job
correctly, the process has exceeded the set pressure and/or temperature. Te Rembe KUB has a 98% operating ratio and has a wide range of pressures, which means the set pressure of the disc can be increased without the need to replace the existing holder for a different style of disc.
Te second myth is that it takes time to change out the disc. Tis is true, but it is not necessarily a bad thing. If you have had an excess pressure event then the worst thing you can do is rapidly replace the disc and start the process again; what about the root cause of the event? Having a fast reset valve is of no use if it takes hours or days to investigate or resolve the overpressure cause, or if you need to wait for HQ or a certifying authority approval to resume the process. By the time the investigation is completed and the repair or rectification deployed the disc will have been replaced. Proper location and ease of access built in at the design stage can also take hours off of the time needed to replace a disc; another Rembe advantage is that there are no special tools, skills or multiple pages of technical information to read to change the disc, just common sense. Rupture discs are also the fastest acting solution.
In a recent case study, an offshore operator in the field of oil & gas conducted its own analysis on a fast opening valve and found that even for a stated opening time of 300ms, system pressure will reach a maximum pressure surge by a factor of five times the maximum allowable operating pressure of the system. By implementing the same simulation using Rembe rupture discs, the customer proved that the maximum pressure seen is well below the design limits. Tis is based on the fact that the discs respond in 2 to 3ms, ensuring instantaneous pressure relief. Te choice of the operator to use a rupture disc rather than a high-speed valve was simple and straightforward. l
For more information ✔ at
www.engineerlive.com/iog Sandra Fuchs is with Rembe in Germany.
www.rembe.de For more information ✔ at
www.engineerlive.com/iog Oil_Gas_89x261_b0mm_07_14.indd 1 01.07.14 11:35
Expertise Reliability Innovation Connect2
Fig. 2. The Rembe discs the respond in 2 to 3 milliseconds, ensuring instantaneous pressure relief.
Get the right solution
Proven, reliable connectors and cable assemblies are here
www.fi scherconnectors.com
Headquarters
Fischer Connectors SA Saint-Prex - Switzerland Phone +41 21 800 95 95 mail@fi
scherconnectors.ch
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