Page 116 - Pressure Vessel Design Manual

96 Pressure Vessel Design Manual

Formulas for Calculating Vessel Weights
Data
D, =mean vessel diameter, in.
L = vessel length, tangent to tangent, in.
T =vessel thickness, in.
A, =area of cone, in.2
d =density of material, Ib/in.3

1 .O Weight of shell For carbon steel
W = n D,tLd = 0.89 DmLt
dfl= 37.7 DmtL = 10.68 D,t
2.0 Weight of heads
hemi = 1.57 D; td = 0.445 Dk t
21 S.E. = 1.084Dktd = 0.307 Dkt
100% - 6% = 0.95 Ditd = 0.269 DG t
Cone = A,td = 0.2833 Act

Calculation of Weight of Weld Neck Flange
- -G
Data
T =thickness of flange r!
0 =flange OD
D =bolt hole diameter
H =hub height
G =hub thickness at small end
W = width of hub
B = ID of flange
v =volume, in.3
d =density of material, Ib/in.3
N = number of bolts/holes
Formulas

1. [$-TIT=(+)

0
A
2. (6 + G}nGH = (+)
3. 0.5{(B + 2G + W)nWH} = (+)

5. V=l+2+3-4=
6. weight = V x d =