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| Vulcan: The Offshore Experience
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Below are listed the center axial centers of gravity for Vulcan
Offshore Hammers.
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| HAMMER SIZE |
CENTER OF GRAVITY
Inches |
| 020 |
73.0 |
| 030 |
84.0 |
| 340 |
93.0 |
| 530 |
99.0 |
| 360 |
94.0 |
| 540 |
108.0 |
| 3100 |
118.0 |
| 560 |
109.0 |
| 5100 |
131.0 |
| 5150 |
124.0 |
| 4250 |
129.0 |
| 6300 |
140.0 |
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| Note: Tip dated 1 August 1980. Some Vulcan sales
people also carried the chart below. Keep in mind that the weights for the pipe cap
are probably before the "Light Weight High Strength" pipe caps begun in the
early 1980's. The hammer distance from the top and the leader weights are also
probably conditioned by the Vulcan leader design before the "Light Weight Pipe
Construction" leaders started in the early 1980's. The chart below was intended
to be more informative to those who were doing calculations for the "pipe
stickup" requirements of API RP2A, which was the main purpose of the center of
gravity data in the first place.
Click here for details on the Internal Pile Hammer, which would have both reduced the assembly weight and the centre of gravity.
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- W1 = Weight of hammer, striking parts, and typical pile
cap (lbs.)
- D1 = Distance from top of pile to center of gravity of
hammer (ft.)
- W2 = Weight of leaders or guide cages (lbs.)
- D2 = Distance from bottom of bell to center of gravity
of leaders (ft.)
| Hammer |
W1 |
D1 |
W2 |
D2 |
| 016 Steam |
42940 |
5.1 |
16850 |
20.0 |
| 020 Steam |
53785 |
6.7 |
16850 |
20.0 |
| 030 Steam |
65410 |
8.4 |
16850 |
20.0 |
| 340 Steam |
129440 |
8.0 |
30000 |
24.1 |
| 530 Steam (54" Jaws) |
67860 |
8.5 |
16850 |
20.0 |
| 530 Steam (80" Jaws) |
89680 |
6.7 |
29700 |
24.1 |
| 360 Steam |
167430 |
8.7 |
64750 |
25.8 |
| 540 Steam |
135780 |
8.0 |
33700 |
24.1 |
| 560 Steam |
179960 |
8.8 |
68000 |
25.8 |
| 5100 Steam |
288500 |
11.1 |
110000 |
31.5 |
| 5150 Steam |
351380 |
11.6 |
110000 |
31.5 |
| 5250 Steam |
558000 |
9.8 |
137000 |
35.0 |
| 6300 Steam |
712000 |
13.0 |
137000 |
35.0 |
| 200C Steam |
52315 |
7.8 |
15500 |
20.0 |
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This entire site Copyright© 1997-2008 Don C. Warrington. All rights reserved.
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