St. Eustatius CALM
Scope of Work
SOFEC designed, constructed, and installed a CALM system for crude oil import and product export as part of a trans-ship-ment terminal facility. St. Eustatius is in the Leeward Islands in the Netherland Antilles approximately 190 miles ESE of Puerto Rico.
General Description
| Client Name: | Chicago Bridge & Iron (CBI) / Statia Terminals |
| Contract Award: | October 1993 |
| Installation Date: | September 1994 |
| Application: | Crude Oil Import / Product Export Trans-shipment Facility |
Project Specifications
| Water Depth: | 65m (212ft) |
| Tanker Size: | 520,000 dwt |
| Dimension: | 12.5mØ x 5.8m |
| Floating Hose: | 2 x 24-in., 1 x 20-in. |
| Underbuoy Hose: | 2 x 24-in., 1 x 20-in. Lazy S |
| Hawser System: | 15-in. Dual grommet |
| Anchor Leg System: | 6 x 3.4375-in. ORQ stud link chain |
| Anchor System: | 6 x 20mt Stevshark anchors |
Design Environmental Criteria
Operational
| Significant Wave Height: | 3m (9.8ft) |
| Wind Velocity: | 7.6m/s (14.7 knots) |
| Surface Current: | 0.5m/s (0.97 knots) |
Survival
| Significant Wave Height: | 11.5m (37.8ft) |
| Wind Velocity: | 58.2m/s (113 knots) |
| Surface Current: | 0.9m/s (1.75 knots) |
Comments
As a partnering arrangement with Chicago Bridge and Iron (CBI), the parent of Statia Terminals, and Brown and Root, SOFEC designed, constructed and installed a dual product CALM system in 65m water depth. The system is designed to survive hurricane conditions and moor tankers up to 520,000 dwt in the operational conditions. It is equipped with a sophisticated SCADA system for remote load monitoring, valve control, leak detection, operating pressure monitoring and battery status. The crude is shipped through a 48-in. subsea pipeline to a temporary storage at a Statia tank farm, from where it is then re-loaded onto smaller tankers for delivery to Gulf of Mexico refineries.