Corrigendum - REACH24H Consulting Group

Copyright@United Nations, 2011. All rights reserved.
C = a constant which is derived from one of the following formulae as a function of the
ratio k of specific heats:
where:
- 302 -
c
k =
c
cp is the specific heat at constant pressure; and
is the specific heat at constant volume.
cv
When k > 1:
C =
⎛ 2 ⎞
k⎜
⎟
⎝ k + 1⎠
When k = 1 or k is unknown:
1
C = =
e
k+
1
k−1
0.
607
where e is the mathematical constant 2.7183
C may also be taken from the following table:
k C k C k C
1.00 0.607 1.26 0.660 1.52 0.704
1.02 0.611 1.28 0.664 1.54 0.707
1.04 0.615 1.30 0.667 1.56 0.710
1.06 0.620 1.32 0.671 1.58 0.713
1.08 0.624 1.34 0.674 1.60 0.716
1.10 0.628 1.36 0.678 1.62 0.719
1.12 0.633 1.38 0.681 1.64 0.722
1.14 0.637 1.40 0.685 1.66 0.725
1.16 0.641 1.42 0.688 1.68 0.728
1.18 0.645 1.44 0.691 1.70 0.731
1.20 0.649 1.46 0.695 2.00 0.770
1.22 0.652 1.48 0.698 2.20 0.793
1.24 0.656 1.50 0.701
6.7.2.12.2.2 As an alternative to the formula above, shells designed for the transport of liquids may
have their relief devices sized in accordance with the table in 6.7.2.12.2.3. This table assumes an insulation
value of F = 1 and shall be adjusted accordingly when the shell is insulated. Other values used in
determining this table are:
M = 86.7 T = 394 K
L = 334.94 kJ/kg C = 0.607
Z = 1
p
v