Qatar Gas intends to develop production of North field and awarded the “NORTH FIELD PRODUCTION SUSTAINABILITY (NFPS) PROJECT INVESTMENT 1 PROJECT 1” EPC Contract to M/s McDermott. In project scope, installation of Nitrogen Cylinder Racks for WHP10N & WHP11N platform is included. M/s McDermott, invited the vendors and awarded the Sub-Contract for installation of Nitrogen Cylinder Racks for WHP10N & WHP11N platform to M/s Tyco Qatar Fire and Security. Structural design and stability analysis of the Nitrogen Cylinder Rack skid has been performed by Elixir Engineering for Tyco Qatar Fire and Security.
Execution Methodology:
- Review of P&ID and Preliminary GA drawing
- Review of Tie-in Schedule and Material Specifications
- Review of Piping material specification and Structural material specification
- Definition of weight for all parts inside the Nitrogen Cylinder racks.
- Definition of Support type and support details
- Cylinder loads and other components load values are provided to Structural team to check integrity of Structural arrangements.
- Modelling of Structural members as per provided GA drawing in Software.
- Definition of Piping loads (Axial, Vertical & Friction loads) in all support locations.
- Definition of other components load on the specified structural locations.
- Definition of External load conditions (Wind load, Seismic parameters) as per project design specification and API RP 2A Ed 22& API RP 2EQ, Ed 1.
- Definition of number of Anchor points and its location.
- Performing structural analysis and check the results for deflection, torsion and other induced stress values.
- Based on the results, additional recommendation to stabilize the structural arrangement for its design life performance. (i.e., Member modification, Wear plate and additional bracing, etc.)
- Performing the analysis for In place condition, lifting condition, Road Transportation condition and Sea/Barge Transportation condition as per acceleration values provided by Client or Project design specification.
- Preforming Lifting lug design and analysis
- Performing Anchor bolt design and analysis
- Performing analysis for Shackle and sling arrangements. Providing the recommendation for suitable lifting plan.
- Preparation of complete report with Results summary and Software results for Structural analysis of Nitrogen Cylinder racks.
- Submission of GA drawing based on the study recommendations.
Deliverables:
- Detailed Structural Design Calculation Report
- Skid GA drawing
