Rupture Disk Selection

4.Trainer : Mohammadreza Behrouzi
Website: eiepd.com
You will the followings:
1.Scenario Defenition
In this part you are taught what a rupture disk is.
Overview
Rupture Disk
Rupture disk devices are non-reclosing PRDs used to protect vessels, piping, and other
pressure-containing components from excessive pressure and/or vacuum. Rupture disks are
used in single and multiple relief device installations. They are also used as redundant PRDs.
With no moving parts, rupture disks are simple, reliable, and faster acting than other PRDs.
Rupture disks react quickly enough to relieve some types of pressure spikes. Because of their
lightweight, rupture disks can be made from high alloy and corrosion resistant materials that are
not practical in PRVs.
Rupture disks can be specified for systems with vapor (gas) or liquid pressure-relief
requirements. Also, rupture disk designs are available for highly viscous fluids. The use of
rupture disk devices in liquid service should be carefully evaluated to ensure that the design of
the disk is suitable for liquid service.
2.Application of Rupture Disks
In this part you learn about different rupture disk applications and where they could be used.
Overview
Rupture disks can be used in any application requiring overpressure protection where a non-
reclosing device is suitable. This includes single, multiple, and fire applications as specified in
UG-134 of the ASME Code.
Rupture Disk Device at the Inlet of a Pressure-relief Valve
Rupture Disk Device at the Outlet of a Pressure-relief Valve
3.Types of Rupture Disks
In this minute the instructor devotes time to rupture disk type and their advantage and disadvantages.
Overview
There are three major rupture disk types
1. Forward-acting, tension-loaded
2. Reverse-acting, compression-loaded;
3. Graphite, shear-loaded.
4.Rupture Disk Selection
In this part the trainer teaches how to use diagram stated in the API to select a rupture disk.

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