Terrenganu #2 CALM
Scope of Work
Designed, constructed and installed a replacement CALM system to accommodate 35,000 to 85,000 dwt tankers in 20m water depth. The system is linked via four 18-in. pipelines to a refinery located two miles away.
General Description
| Client Name: | Petronas Carigali |
| Contract Award: | April 1998 |
| Installation Date: | April 1999 |
| Application: | Multi Product (Crude oil, fuel oil, diesel and naphtha) Import and Export |
Project Specifications
| Water Depth: | 20m (65ft) |
| Tanker Size: | 85,000 dwt |
| Dimension: | 11.5mØ x 3.3m |
| Floating Hose: | 2 x 20-in. |
| Underbuoy Hose: | 2 x 16-in. Chinese Lantern |
| Hawser System: | 12-in. Dual hawser |
| Anchor Leg System: | 6 x 2.75-in. ORQ |
| Anchor System: | 7mt Stevfix anchors |
Design Environmental Criteria
Operational
| Significant Wave Height: | 4.5m (14.8ft) |
| Wind Velocity: | 18m/s (35 knots) |
| Surface Current: | 1.5m/s (2.9 knots) |
Survival
| Significant Wave Height: | 5.3m (17.4ft) |
| Wind Velocity: | 31.4m/s (61 knots) |
| Surface Current: | 1.9m/s (3.7 knots) |
Comments
In 1982, SOFEC designed, constructed, and installed a multi product import/ export CALM system for Petronas. SOFEC removed the existing system and installed a replacement CALM plus 55m of chain per leg. This system uses a relatively small main bearing and three heavy outboard turntable rollers running on a replaceable crane rail track.
The CALM buoy itself features six self-aligning chain stoppers, vertical pull hawse pipes, six watertight compartments, and closed centerwell. The buoy deck is equipped with a quick disconnect manifold for manual operation of the hydraulic system for control of underwater PLEM ball valves.
The Terengganu CALM is a low maintenance design with fully sealed rotating components that require minimal lubrication and can be replaced without removing the turntable. All components are designed to allow full field servicing.