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Installation Manual
MMI- 20032352
6
Pressure relief
HPC sensors are available with a rupture disk installed on the case. Rupture disks vent
process fluid from the sensor case in the unlikely event of a flow tube breach. Some users
connect a pipeline to the rupture disk to help contain escaping process fluid. For more
information about rupture disks, contact customer service.
If the sensor has a rupture disk, keep it installed at all times as it would otherwise be
necessary to re-purge the case. If the rupture disk is activated by a tube breach, the seal in
the rupture disk will be broken, and the Coriolis meter should be removed from service.
Stay clear of the rupture disk pressure relief area. High-pressure fluid escaping from the
sensor can cause severe injury or death.
The sensor must be oriented so that personnel and equipment will not be exposed to any
discharge along the pressure relief path.
Important
If a rupture disk is used, the housing can no longer assume a secondary containment
function.
Removing the purge fitting, blind plug, or rupture disks compromises the Ex-i Safety
Certification, the Ex-tc Safety Certification, and the IP-rating of the Coriolis meter. Any
modification to the purge fitting, blind plug, or rupture disks must maintain a minimum
of IP66/IP67 Ratings.
Installation Manual
WARNING
WARNING
Pressure relief
August 2019
23
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