Eclipse Engineering


Eclipse Engineering

ASME Section VIII Consulting

Eclipse is very experienced with applying analytical techniques such as FEA and CFD to the ASME Section VIII, Divisions 1 & 2 Codes. Sometimes the design of a component is not explicitly covered by the Code, but still must meet the design philosophy of the Code per U-2(g) and requirements of UG-23. Thanks to our extensive experience on the shop floor as well as on the computer, fabricators have never had a problem building an Eclipse design. We provide a complete set of calculations for the Authorized Inspector (AI); of the many hundreds of calculations we've provided, none have been rejected. Our experience translates into quicker turn-arounds, attractive pricing, and fewer problems.

Some projects with challenging criteria that we have successfully dealt with include:


  • Shop handling (lifting, rigging, etc.)
  • Wind and seismic loading
  • Fatigue analysis
  • Differential thermal expansion
  • Forensic analysis
  • Weld analysis



  • Primary structural system ("non-building structure")
  • Economizers
  • Headers and header supports
  • Tube defect analysis
  • Serpentine straps (fabricated and cast)
  • D-links and alignment lugs
  • Support blocks, stools, and ladders
  • Vibration bars
  • Stringer supports
  • Thermal expansion and related tube supports

Chemical Process

  • Rectangular flanges
  • Rectangular tubesheets
  • Vessels with agitators
  • PSA vessels
  • Large openings
  • Piping interaction
  • Cyclic analysis of quick-opening closures
  • Skidded systems
  • Rectangular flat heads
  • Plate heat exchangers
  • Shell & tube heat exchangers
  • Braced & stayed surfaces
  • Vessel supports
  • Clamped closures
  • Transport tanks
  • Boiler components
  • Platforms and attachments
  • Tubesheets with asymmetric layouts
  • Tubesheets with large un-tubed areas
  • Heat exchangers with different tubesheet thicknesses
  • Transitional shapes (Cones, elbows, etc.)
  • Tangential connections
  • Flange deformation and sealing
  • Tall columns
  • Support for vessel internals

Analysis Tools Used

  • RISA
  • AutoCAD, Inventor
  • SolidWorks, Pro/ENGINEER
  • Excel
  • Mathcad
  • EKLIPSTM FEA service

Design Codes Used

  • ASME Section VIII, Divisions 1 & 2
  • BS 5500
  • PIP
  • API 579
  • TEMA