Structural Calculation and Piping Stress Analysis for 9 Nos. of Deluge Skids for TYCO Fire & Security UAE LLC.

ADNOC intends to install Deluge Skids for the ongoing project of “Buhasa Firewater Network Replacement”. ADNOC awarded the project to M/s Progetti Europa & Global (PEG) &Equilibrium Engineering Consultancy. M/s Progetti Europa & Global (PEG) invited vendors and awarded the Contract for installation of 9 Deluge Skids to M/s TYCO Fire & Security UAE LLC. Structural and Piping stability analysis of the deluge skids were performed by Elixir Engineering for TYCO Fire & Security UAE LLC.

Scope of Work for Engineering Studies:

  • To perform Piping Stress Analysis
  • To perform Structural design calculation and GA drawing modification
  • To perform Fusible Loop Calculation

Execution Methodology:

  • Review of P&ID and Preliminary GA drawing
  • Performing fusible loop calculation and determining the Orifice size and Instrument gas requirement based on the deluge valve actuation
  • Review of Tie-in Schedule and Material Specifications
  • Review of Piping material specification and Structural material specification
  • Preparation of input requirement sheet to collect connecting pipe nozzle loads from Skid battery limit
  • Review and collection of data from connecting pipe isometrics up to first Anchor point
  • Pipe modelling as per provided preliminary GA drawing in CAESAR II Software
  • Definition of fluid and material properties as per project specification
  • Definition of External load conditions (Wind load and Seismic parameters) as per project design specification
  • Definition of Support type and support details
  • Performing the Stress analysis for Various load conditions (Thermal load, Sustained Load, Occasional Load and Transportation load) as per project design specification and Stress analysis basis
  • Validation of pipe load values in all support locations and node points
  • Validation of deflection and Pipe stress values within allowable limit
  • Finalizing the first anchor point, based on the connecting nozzle loads inside and outside of the Skid
  • If stress and deflection limits are exceeded, the analysis will be re-performed for suitable Pipe Support and routing arrangements
  • If all stress and load values are within the limit, the Stress summary, Restraint summary with Input Echo are extracted and submitted to client
  • The necessary changes in GA drawing with respect to piping and Pipe support arrangements will be updated
  • Piping loads and other components load values (Empty, Operating and Test) are collected from other teams to check integrity of Structural arrangements
  • Modelling of Structural members as per provided GA drawing in STAAD Pro Software.
  • Definition of new and existing 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
  • 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 Lifting lug calculation and analysis
  • Determining Shackle and lifting philosophy
  • Performing Anchor bolt design and analysis
  • Preparation of complete report with Results summary and Software results for Stress and Structural analysis
  • Submission of GA drawing based on the study recommendations.


  • Detailed Piping Stress Analysis Report
  • Detailed Structural Design Calculation Report
  • Piping Stress Isometric drawings
  • Structural and Piping GA Drawings with recommendations

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