Rupture, disk Reverse buckling

Figure 7-8G. Reverse buckling disk, showing top holder with knife blades (underside) that cut the disk at time of rupture. By permission, B.S. B. Safety Systems, Inc.

Runaway reactions, 405 Runaway reactions, DIERS, 521-523 Rupture, disk, 401, 418, 435, 455 Burst pressure, 456 Calculations, non-explosive, 455, 459 Code pressure levels, 410 Effects of temperature, 458 Graphite, 418-420, 424 Installation, 422, 423 Liquids, 462 Low pressure, 418, 421 Manufacturing range, 434, 456 Metal, 411 Non-fire, 465 Quick opening, 414, 415 Reverse buckling, 413 Selection features, 434... 

Reverse-domed rupture disks are domed against the direction of applied rupturing pressure, as shown in Fig. 8-17, and are designed to rupture by buckling under pressure. 

The other type of safety device commonly used on the inner vessel is a safety head or rupture disk. In case the relief valve malfunctions, these disks are set to burst at approximately 1.2 times the working pressure. Typical bursting disks are of the simple dome type, which burst due to tensile stresses. Recently, reverse buckling disks, which have the dome oriented toward the pressure, have proven themselves to be a highly cost-effective alternative. An advantage of the reverse buckling disks, in contrast to conventional disks, is that they are ruptured as a result of compressive load and thus are not subject to creep failure. 

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