Description
The crown follows a smooth elliptical curve and reaches the straight flange without a sharp break, leaving a workable edge for the circumferential joint. elliptical dished heads can be made from carbon steel, stainless steel, SA516 Gr70, or SA516 Gr60. Depending on plate condition, diameter, and thickness, we use hydraulic pressing or cold and hot spinning. The press line includes 315T, 500T, 1000T, and 1200T equipment. After forming, the rim is trimmed and the flange is corrected for shell fit-up. Bevels, openings, orientation marks, pickling, passivation, polishing, or coating preparation can be completed before dispatch.
Main Applications
Reactor and separator shells where the vessel end must remain within a defined overall length.
Heat exchangers, boilers, air receivers, and process tanks that use welded end closures.
Horizontal and vertical storage vessels where elliptical dished heads influence internal volume and nozzle clearance.
Replacement work for existing shells with fixed diameters, flange heights, or connection positions.
Product Parameters
|
No. |
Nominal Diameter DN/mm |
Total Depth H/mm |
Internal Surface Area A/m² |
Capacity V/m³ |
No. |
Nominal Diameter DN/mm |
Total Depth H/mm |
Internal Surface Area A/m² |
Capacity V/m³ |
|
1 |
300 |
100 |
0.1211 |
0.0053 |
34 |
2900 |
765 |
9.4807 |
3.4567 |
|
2 |
350 |
113 |
0.1603 |
0.0080 |
35 |
3000 |
790 |
10.1329 |
3.8170 |
|
3 |
400 |
125 |
0.2049 |
0.0115 |
36 |
3100 |
815 |
10.8067 |
4.2015 |
|
4 |
450 |
138 |
0.2548 |
0.0159 |
37 |
3200 |
840 |
11.5021 |
4.6110 |
|
5 |
500 |
150 |
0.3103 |
0.0213 |
38 |
3300 |
865 |
12.2193 |
5.0463 |
|
6 |
550 |
163 |
0.3711 |
0.0277 |
39 |
3400 |
890 |
12.9581 |
5.5080 |
|
7 |
600 |
175 |
0.4374 |
0.0353 |
40 |
3500 |
915 |
13.7186 |
5.9972 |
|
8 |
650 |
188 |
0.5090 |
0.0442 |
41 |
3600 |
940 |
14.5008 |
6.5144 |
|
9 |
700 |
200 |
0.5861 |
0.0545 |
42 |
3700 |
965 |
15.3047 |
7.0605 |
|
10 |
750 |
213 |
0.6686 |
0.0663 |
43 |
3800 |
990 |
16.1303 |
7.6364 |
|
11 |
800 |
225 |
0.7566 |
0.0796 |
44 |
3900 |
1015 |
16.9775 |
8.2427 |
|
12 |
850 |
238 |
0.8499 |
0.0946 |
45 |
4000 |
1040 |
17.8464 |
8.8802 |
|
13 |
900 |
250 |
0.9487 |
0.1113 |
46 |
4100 |
1065 |
18.7370 |
9.5498 |
|
14 |
950 |
263 |
1.0529 |
0.1300 |
47 |
4200 |
1090 |
19.6493 |
10.2523 |
|
15 |
1000 |
275 |
1.1625 |
0.1505 |
48 |
4300 |
1115 |
20.5832 |
10.9883 |
|
16 |
1100 |
300 |
1.3980 |
0.1980 |
49 |
4400 |
1140 |
21.5389 |
11.7588 |
|
17 |
1200 |
325 |
1.6552 |
0.2545 |
50 |
4500 |
1165 |
22.5162 |
12.5644 |
|
18 |
1300 |
350 |
1.9340 |
0.3208 |
51 |
4600 |
1190 |
23.5152 |
13.4060 |
|
19 |
1400 |
375 |
2.2346 |
0.3977 |
52 |
4700 |
1215 |
24.5359 |
14.2844 |
|
20 |
1500 |
400 |
2.5568 |
0.4860 |
53 |
4800 |
1240 |
25.5782 |
15.2003 |
|
21 |
1600 |
425 |
2.9007 |
0.5864 |
54 |
4900 |
1265 |
26.6422 |
16.1545 |
|
22 |
1700 |
450 |
3.2662 |
0.6999 |
55 |
5000 |
1290 |
27.7280 |
17.1479 |
|
23 |
1800 |
475 |
3.6535 |
0.8270 |
56 |
5100 |
1315 |
28.8353 |
18.1811 |
|
24 |
1900 |
500 |
4.0624 |
0.9687 |
57 |
5200 |
1340 |
29.9644 |
19.2550 |
|
25 |
2000 |
525 |
4.4930 |
1.1257 |
58 |
5300 |
1365 |
31.1152 |
20.3704 |
|
26 |
2100 |
565 |
5.0443 |
1.3508 |
59 |
5400 |
1390 |
32.2876 |
21.5281 |
|
27 |
2200 |
590 |
5.5229 |
1.5459 |
60 |
5500 |
1415 |
33.4817 |
22.7288 |
|
28 |
2300 |
615 |
6.0233 |
1.7588 |
61 |
5600 |
1440 |
34.6975 |
23.9733 |
|
29 |
2400 |
640 |
6.5453 |
1.9905 |
62 |
5700 |
1465 |
35.9350 |
25.2624 |
|
30 |
2500 |
665 |
7.0891 |
2.2417 |
63 |
5800 |
1490 |
37.1941 |
26.5969 |
|
31 |
2600 |
690 |
7.6545 |
2.5131 |
64 |
5900 |
1515 |
38.4749 |
27.9776 |
|
32 |
2700 |
715 |
8.2415 |
2.8055 |
65 |
6000 |
1540 |
39.7775 |
29.4053 |
|
33 |
2800 |
740 |
8.8503 |
3.1198 |
- |
- |
- |
- |
- |
Our Services
Material choices include carbon steel, stainless steel, SA516 Gr70, and SA516 Gr60.
Pressing is used for many regular dimensions, while spinning supports larger diameters and less common profiles.
Edge trimming, beveling, opening work, direction marking, and surface preparation can be completed in the workshop.
Material certificates, dimensional records, inspection reports, and product certificates can travel with the shipment.
Export supports and shipping marks are planned around diameter, finish, and lifting method.
Technical staff can answer fit-up and document questions after the products reach the vessel fabricator.
Frequently Asked Questions (FAQ)
Q: Can a head be matched to an existing shell?
A: Yes. The measured circumference or actual diameter can be used when the final fit-up dimension is established.
Q: Can openings be made before delivery?
A: Yes. Hole size, location, bevel, and orientation should be shown on the approved drawing.
Q: What details are needed for elliptical dished heads?
A: Please send the material grade, diameter basis, nominal thickness, minimum formed thickness, straight-flange height, edge details, quantity, standard, and inspection requirements.
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