Page 444 - APPLIED PROCESS DESIGN FOR CHEMICAL AND PETROCHEMICAL PLANTS, Volume 1, 3rd Edition

410 Applied Process Design for Chemical and Petrochemical Plants

Vessel Typical Characteristics of a
Pressure Veuel Requirements Pressure Rupture Disk Device
Maximum allowable Maximum relieving
accumulated pressure 121 pressure for
(fire exposure only) - 120 - fire sizing
- -
- -
Maximum allowable Maximum relieving
accumulated pressure - - pressure for
for installation of a 116 process sizing
multiple rupture disk
device (other than - 115- t Multiple rupture disk device
fire exposure) - - - Single rupture disk device
- -
- -
Maximum allowable - ' ,
accumulated pressure - al' Maximum allowable burst pressure
0
for installation of a :, 110 for supplemental (fire exposure)
ca
single rupture disk .9! - j I rupture disk device
device (other than - � (see Note 6)
:,
fire exposure) -111 -
Cl) , ....,...__ Overpressure (maximum)
41
-a -
0
-c - Maximum allowable burst pressure
�
-� - (see Note 6)
-o 105
for additional rupture disk device
J
ii
-J -
0
� ii -
Maximum allowable -§ - I , Maximum allowable burst pressure
working pressure E
.i 100
or design pressure _e for single rupture disk device
-- -
(see Note 3) - (see Note 6)
0
c
- fl -
- 95-
-£ -
-
-
-
-
-
-
Maximum expected - -
operating pressure 90-
(see Notes 5 and 6) - -
- -
- -
- -
- 85-
Notes:
I. This figure conforms with the requirements of Section VIII of the 4. The allowable burst-pressure tolerance will be in accordance with
ASME Boiler and Pressure Vessel Code. the applicable code.
2. The pressure conditions shown are for rupture disk devices in- 5. The operating pressure may be higher or lower than 90 depending
stalled on a pressure vessel. on the rupture disk design.
3. The margin between the maximum allowable working pressure 6. The stamped burst pressure of the rupture disk may be any pres-
and the operating pressure must be considered in the selection of a sure at or below the maximum allowable burst pressure.
rupture disk.
Figure 7-78. Pressure level relationships for rupture disk devices. Reprinted by permission, Sizing, Selection and Installation of Pressure
Relieving Devices in Refineries, Part 1 "Sizing and Selection," API RP-520, 5th Ed., July 1990, American Petroleum Institute.