Rupture disc assembly

The process is run in a semi-batch mode, and multiple reactors are used. There are several possible causes for a loss of control such as insufficient heat removal and loss of agitation. Overpressurization leading to the bursting of rupture discs takes place several times per year, indicating both the clear need for containment but also a need to consider design and control improvements. The reference describes the autoclave rupture disc assembly, procedures for replacement of the discs, the cleaning of the containment vessels, and the routine maintenance procedures for the containment vessels. 

The best way to prevent accidents such as this is to use rupture discs, which are harder to assemble incorrectly and which can be checked for correct installation after assembly. It is possible to get discs permanently attached to their vacuum supports by the manufacturer and fitted with a projecting tag, which carries the words vent side on one side. The tag also gives the pressure rating. 

Rupture discs do not re-close, and are used therefore as the last defense. The illustration in Fig. 7.2-9 shows a rupture-disc port assembly. The holder is provided with a liner made of Inconel and internally mounted. The effective area is typically in the range of 100 -200- 10 4 m2. 

Figure 7.2-9. Rupture disc port assembly [8], 1, vessel wall 2, disc 3, Inconel liner ...

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