Description
A spherical cap has a curved center and a shallower rise than a hemispherical head, making it useful for compact tank ends and covers. spherical tank heads can be produced from carbon steel, stainless steel, SA516 Gr70, or SA516 Gr60. The forming route depends on diameter, thickness, cap depth, material condition, and quantity. After shaping, the rim is trimmed and the flange is checked before edge preparation. Openings, reinforcement parts, direction marks, pickling, passivation, polishing, or coating preparation may be completed after the final curvature has been measured. The listed mass values are useful when a buyer is planning manual handling, lifting points, or a shared shipping frame.
Main Applications
Compact tank ends, vessel covers, and process equipment with limited external depth.
Storage units where the curved cover must remain lower than an elliptical or hemispherical form.
Fabrication packages that need tabled area, capacity, and mass values for lifting or finishing work.
Equipment using spherical tank heads with drawing-controlled flange height and opening positions.
Product Parameters
|
No. |
Nominal Diameter DN/mm |
Nominal Thickness δn/mm |
Total Depth H/mm |
Internal Surface Area A/m² |
Capacity V/m³ |
Mass W/kg |
|
1 |
300 |
2 |
40 |
0.0747 |
0.0014 |
1.1803 |
|
2 |
300 |
3 |
39 |
0.0741 |
0.0014 |
1.7637 |
|
3 |
300 |
4 |
39 |
0.0736 |
0.0014 |
2.3425 |
|
4 |
300 |
5 |
39 |
0.0731 |
0.0014 |
2.9169 |
|
5 |
300 |
6 |
38 |
0.0725 |
0.0013 |
3.4868 |
|
6 |
350 |
2 |
46 |
0.1019 |
0.0023 |
1.6083 |
|
7 |
350 |
3 |
46 |
0.1012 |
0.0022 |
2.4045 |
|
8 |
350 |
4 |
46 |
0.1006 |
0.0022 |
3.1955 |
|
9 |
350 |
5 |
45 |
0.1000 |
0.0022 |
3.9812 |
|
10 |
350 |
6 |
45 |
0.0994 |
0.0021 |
4.7616 |
|
11 |
400 |
2 |
53 |
0.1332 |
0.0034 |
2.1024 |
|
12 |
400 |
3 |
53 |
0.1325 |
0.0033 |
3.1445 |
|
13 |
400 |
4 |
52 |
0.1318 |
0.0033 |
4.1806 |
|
14 |
400 |
5 |
52 |
0.1311 |
0.0033 |
5.2106 |
|
15 |
400 |
6 |
52 |
0.1304 |
0.0032 |
6.2347 |
|
16 |
400 |
8 |
51 |
0.1290 |
0.0032 |
8.2650 |
|
17 |
450 |
3 |
59 |
0.1680 |
0.0048 |
3.9836 |
|
18 |
450 |
4 |
59 |
0.1672 |
0.0047 |
5.2978 |
|
19 |
450 |
5 |
59 |
0.1664 |
0.0047 |
6.6053 |
|
20 |
450 |
6 |
59 |
0.1656 |
0.0046 |
7.9060 |
|
21 |
450 |
8 |
58 |
0.1640 |
0.0046 |
10.4873 |
|
22 |
500 |
3 |
66 |
0.2077 |
0.0066 |
4.9218 |
|
23 |
500 |
4 |
66 |
0.2068 |
0.0065 |
6.5472 |
|
24 |
500 |
5 |
66 |
0.2059 |
0.0065 |
8.1652 |
|
25 |
500 |
6 |
65 |
0.2050 |
0.0064 |
9.7756 |
|
26 |
500 |
8 |
65 |
0.2033 |
0.0063 |
12.9739 |
|
27 |
500 |
10 |
64 |
0.2015 |
0.0062 |
16.1425 |
|
28 |
550 |
3 |
73 |
0.2517 |
0.0088 |
5.9591 |
|
29 |
550 |
4 |
73 |
0.2507 |
0.0087 |
7.9288 |
|
30 |
550 |
5 |
72 |
0.2497 |
0.0086 |
9.8902 |
|
31 |
550 |
6 |
72 |
0.2487 |
0.0086 |
11.8434 |
|
32 |
550 |
8 |
71 |
0.2467 |
0.0084 |
15.7249 |
|
33 |
550 |
10 |
71 |
0.2448 |
0.0083 |
19.5736 |
|
34 |
600 |
3 |
80 |
0.2998 |
0.0114 |
7.0956 |
|
35 |
600 |
4 |
79 |
0.2987 |
0.0113 |
9.4426 |
|
36 |
600 |
5 |
79 |
0.2976 |
0.0112 |
11.7805 |
|
37 |
600 |
6 |
79 |
0.2966 |
0.0112 |
14.1094 |
|
38 |
600 |
8 |
78 |
0.2944 |
0.0110 |
18.7402 |
|
39 |
600 |
10 |
78 |
0.2923 |
0.0108 |
23.3351 |
|
40 |
650 |
3 |
86 |
0.3521 |
0.0145 |
8.3311 |
|
41 |
650 |
4 |
86 |
0.3510 |
0.0144 |
11.0885 |
|
42 |
650 |
5 |
86 |
0.3498 |
0.0143 |
13.8360 |
|
43 |
650 |
6 |
85 |
0.3486 |
0.0142 |
16.5737 |
|
44 |
650 |
8 |
85 |
0.3463 |
0.0140 |
22.0198 |
|
45 |
650 |
10 |
84 |
0.3440 |
0.0139 |
27.4269 |
|
46 |
700 |
3 |
93 |
0.4087 |
0.0181 |
9.6658 |
|
47 |
700 |
4 |
93 |
0.4074 |
0.0180 |
12.8665 |
|
48 |
700 |
5 |
92 |
0.4062 |
0.0179 |
16.0566 |
|
49 |
700 |
6 |
92 |
0.4049 |
0.0178 |
19.2362 |
|
50 |
700 |
8 |
91 |
0.4024 |
0.0176 |
25.5637 |
|
51 |
700 |
10 |
91 |
0.3999 |
0.0174 |
31.8492 |
|
52 |
750 |
4 |
99 |
0.4681 |
0.0222 |
14.7768 |
|
53 |
750 |
5 |
99 |
0.4667 |
0.0221 |
18.4425 |
|
54 |
750 |
6 |
99 |
0.4654 |
0.0220 |
22.0969 |
|
55 |
750 |
8 |
98 |
0.4627 |
0.0217 |
29.3719 |
|
56 |
750 |
10 |
98 |
0.4600 |
0.0215 |
36.6019 |
|
57 |
800 |
4 |
106 |
0.5330 |
0.0270 |
16.8191 |
|
58 |
800 |
5 |
106 |
0.5315 |
0.0269 |
20.9936 |
|
59 |
800 |
6 |
105 |
0.5301 |
0.0267 |
25.1559 |
|
60 |
800 |
8 |
105 |
0.5272 |
0.0264 |
33.4445 |
|
61 |
800 |
10 |
104 |
0.5244 |
0.0262 |
41.6850 |
|
62 |
800 |
12 |
104 |
0.5215 |
0.0259 |
49.8775 |
|
63 |
800 |
14 |
103 |
0.5187 |
0.0256 |
58.0224 |
|
64 |
800 |
16 |
103 |
0.5158 |
0.0253 |
66.1198 |
Product Advantages
A shallow cap can reduce the added length at the end of a vessel.
Multiple thickness rows allow mass and capacity to be checked against the actual plate selection.
The table supports early lifting, surface-treatment, and internal-volume estimates.
Pressing and spinning can be matched to diameter, thickness, and order quantity without changing the specified geometry. The finished cap can also be marked for top, bottom, or nozzle orientation.
The listed mass values also help receiving teams select a suitable lifting method before the cap is unpacked.
Frequently Asked Questions (FAQ)
Q: Is a spherical cap the same as a hemispherical head?
A: No. The cap is shallower, and the depth, volume, mass, and design calculation differ.
Q: Can larger diameters be manufactured?
A: Yes. The final range depends on the drawing, material, thickness, forming route, and available handling equipment.
Q: What details are needed for spherical tank heads?
A: Send diameter, thickness, required depth, material, flange height, openings, edge preparation, quantity, standard, and inspection scope.
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