Hull

The FLNG hull structure is the foundation supporting all component systems including the External Turret, Topsides infrastructure and LQ (including helideck and TEMPSC). Datum point for the FLNG facility refers to the aft centerline point of the vessel bottom. The hull structure is a double bottomed, double sided design that meets Class and the COMPANY requirements in accordance with the Basis of Design [3.3]. The FLNG facility is dual CLASS rated, in accordance with requirements of both Biro Klasifikasi Indonesia (BKI) and American Bureau of Shipping (ABS) [2.1]. The main hull is longitudinally framed with the exception of at the hull ends that are transversely framed to better suit hull construction. The shell and deck plates are gradually tapered in thickness from the midship portion to the ends in accordance with Class requirements. The hull provides a buoyant watertight structure supporting the topside structure, whilst resisting the loads from normal operation, extreme environmental conditions and accidental events for its stipulated design life of 30 years without overstressing the structure. Additional reinforcement for a design load of 70 MT/m2 is provided at designated areas along the periphery of the hull to account for tug pushing. In addition, the hull structure is also reinforced with fenders to protect the FLNG from inadvertent minor collisions of up to 4531kN during side-by-side mooring [10.1].

The hull structure is constructed of mild steel unless otherwise specified. Higher tensile steel is applied to but not limited to the following areas [10.1]:

  1. Deck plating and attached longitudinal stiffeners in cargo hold areas;
  2. Keel plating and attached longitudinal stiffeners in cargo hold areas;
  3. Bottom plating and attached longitudinal stiffeners in cargo hold areas;
  4. Bilge plating and attached longitudinal stiffeners (if any) in cargo hold areas;
  5. Inner bottom and attached longitudinal stiffeners in cargo hold areas;
  6. Double bottom girder and attached longitudinal stiffeners;
  7. Sheer strake and attached longitudinal stiffeners in cargo hold areas;
  8. Inner longitudinal bulkhead plating and attached longitudinal stiffeners for last strake connecting with upper deck;
  9. Lower strake plate and attached longitudinal stiffeners in hopper section in cargo hold areas;
  10. Supports and reinforcement of Topsides modules, flare tower, crane and turret, etc.;
  11. Supports for the LNG tanks;