Butinge CALM
Scope of Work
SOFEC designed and constructed a CALM system to accommodate a 96,920 dwt tanker for operation in a cold weather environment.
General Description
| Client Name: | Butinge Nafta |
| Contract Award: | November 1997 |
| Installation Date: | November 1998 |
| Application: | Crude Oil, Gas Product, Kerosene Import/Export |
Project Specifications
| Water Depth: | 20m (66ft) |
| Tanker Size: | 35,000 - 96,920 dwt |
| Dimension: | 12.5mØ x 5.3m |
| Floating Hose: | 2 x 16-in. |
| Underbuoy Hose: | 2 x 16-in. Chinese Lantern |
| Hawser System: | 11-in. Single grommet |
| Anchor Leg System: | 6 x 3.5-in. ORQ |
| Anchor System: | 12mt Drag anchors |
Design Environmental Criteria
Operational
| Significant Wave Height: | 4m (13ft) |
| Wind Velocity: | 18m/s (35 knots) |
| Surface Current: | 1m/s (2 knots) |
Survival
| Significant Wave Height: | 9.2m (30.3ft) |
| Wind Velocity: | 54m/s (105 knots) |
| Surface Current: | 1.6m/s (3 knots) |
Comments
The SOFEC CALM system designed and constructed to load and lift crude oil from tankers through the Butinge Terminal. It is located approximately 7.3km offshore in the Baltic Sea near the northern border of Latvia in 20m water depth. The system features SOFEC’s 12.5m diameter, 12-compartment buoy, with special considerations for the cold weather and ice conditions. The CALM is provided with a PLEM to transition from the submarine pipeline to each of the two loading hoses. Crude transfer is through a 36-in. pipeline.