Dangote CALM Buoys SPM-C1 & SPM-C2
Scope of Work
SOFEC was responsible for the engineering, procurement and construction of five (5) CALM Buoys and associated anchor chain legs, PLEMs, piles, hoses, mooring hawsers, and all ancillaries in accordance with Oil Companies International Maine Forum (OCIMF) Guidelines. The project was executed primarily by SOFEC’s Singapore team with support from the Houston office.
The two (2) Crude Oil buoys are capable of transferring up to 80,000 Barrels Per Hour (BPH) of Crude oil to a calling tanker of up to 320,000 DWT. They are used to import feed stock to the refinery.
The Multi-Product buoys are capable of transferring up to 25,000 BPH of segregated refined products to calling tankers of up to 160,000 DWT. These buoys are used to export ethanol, gasoline, diesel, jet fuel and kerosene. Each of the export product lines on these multi-product buoys shall be dedicated to a single type of product.
The buoys are classed by American Bureau of Shipping and were constructed in SE Asia.
General Description
| Client Name: | Dangote Petroleum |
| Contract Award: | August 2016 |
| Installation Date: | July 2020 |
| Application: | Import Crude Oil |
| Flow Capacity: | 80,000 BPH |
Project Specifications
| Water Depth: | SPM-C1: 36m (118ft) SPM-C2: 40m (131ft) |
| Tanker Size: | 320,000 DWT |
| Buoy Dimension | 12.5mØ x 5.3m |
| Fluid Swivel Type: | Inline Swivel |
| Hose System: | Dual 24-in. Double Carcass |
| Hawser System: | Dual Single Leg (non-grommet) 55m long, braided nylon |
| Anchor Leg System: | 6 x 1 configuration, 76mmØ, Studless Gr. R3, 312m long |
| Anchor System: | Driven anchor piles |
Design Environmental Criteria
Operational
| Significant Wave Height: | 2.8m (9ft) |
| Wind Velocity: | 10.1m/s (19.6 knots) |
| Surface Current: | 0.67m/s (1.3 knots) |
Survival
| Significant Wave Height: | 3.9m (12.8ft) |
| Wind Velocity: | 12.8m/s (24.8 knots) |
| Surface Current: | 1.0m/s (1.9 knots) |