Petroleum and Chemical Storage Tanks - page 69

ASME Semi-elliptical Heads
These superior heads are designed,
engineered, and manufactured
to individual customers’ application
and specifications for pressure
conditions. Tolerances comply with
ASME requirements. These heads have
a 2:1 diameter to depth ratio and are
butt-welded to the tank shell.
Highland Storage Tank and ASME Pressure Vessel heads are of superior quality, value, and craftsmanship. Our heads are
fabricated of either A36 and SA516 Grade 70 carbon steel and 304, 304L, 316, or 316L stainless steel. Thicknesses range
from 14 gauge to 1-1/4".
Three styles of tank heads are available in diameters from 2'-0" to 14'-0":
Standard Flat-flanged Heads
These cost effective heads are
commonly used in applications
where the tank will be operated at
atmospheric pressure. The head’s
flange fits precisely inside the tank
shell to form a strong lap-welded joint.
Standard Flanged & Dished Heads
When applications require slightly
higher operating pressures, our non-
ASME flanged & dished design gives
the tank the most strength without
adding thickness. The lap-welded joint
between the inner head flange and
the outer tank shell provides superior
“ribbed” strength.
• 69
Standard Tank Head Design
Tank Head
Diameter
per ft.
per in.
Standard Dished ASME Dished Standard Dished ASME Dished
2'-0"
23.5
1.96
8
8
4.4375"
4.4375"
2'-6"
36.7
3.06
14
14
5.1875"
5.1875"
3'-0"
52.9
4.4
22
24
6"
6.625"
3'-6"
72
6
33
35
6.8125"
7.4375"
4'-0"
94
7.8
46
50
7.625"
8.1875"
4'-6"
119
9.9
63
71
8.4375"
9.625"
5'-0"
147
12.3
82
93
9.25"
10.4375"
5'-6"
178
14.8
106
119
10"
11.1875"
6'-0"
211
17.6
133
157
10.8125"
12.625"
6'-6"
248
20.7
165
193
11.625"
13.4375"
7'-0"
288
24
201
244
12.4375"
14.8125"
7'-6"
330
27.5
242
293
13.25"
15.625"
8'-0"
376
31.3
288
347
14.0625"
16.4375"
8'-6"
424
35.4
340
422
14.8125"
17.8125"
9'-0"
476
39.7
398
490
15.625"
18.625"
9'-6"
530
44.2
461
566
16.4375"
19.4375"
10'-0"
587
49
531
669
17.25"
20.8125"
10'-6"
648
54
608
761
18.0625"
21.625"
11'-0"
711
59.2
692
862
18.875"
22.4375"
11'-6"
777
64.8
783
1023
19.6875"
24.4375"
12'-0"
846
70.5
882
1145
20.4375"
25.25"
Capacity of Shell, Gal.
Capacity of Head, Gal.
Depth of Dish, Inches
1...,59,60,61,62,63,64,65,66,67,68 70,71,72
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