Page 453 - APPLIED PROCESS DESIGN FOR CHEMICAL AND PETROCHEMICAL PLANTS, Volume 1, 3rd Edition
P. 453
Process Safety and Pressure-Relieving Devices 419
Figure 7-9C. Armored graphite disk. Note steel ring bonded to cir-
cumference of disk to increase safety in toxic or flammable services
and improve reliability by preventing unequal piping stresses from
reaching the pressure membrane. Teflon® coatings or linings are
available on the entire disk. By permission, Zook Enterprises. Rupture disc installation
Vent side (lower pressure side)
Product side (higher pressure side)
Figure 7-9D. Protection against two different pressures from opposite directions using graphite disks, such as in closed storage tanks. Par-
ticularly APl-type to guard against failure of primary breathers, conservation vents, etc. These require a differential of at least 10 psig between
the two burst ratings, depending on diameters of disks. By permission, Continental Disc Corporation.
