The KEE Experience

As of January 1, 2022, ASME Section VIII, Division 1, Appendix 47 requires a Certifying Engineer to lead your design team for all pressure vessels.

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KEE Engineering provides a registered Professional Engineer (PE) for your Certifying Engineer for pressure vessel fabricators, or repair alteration.

Pressure Vessels and Heat Exchanger Design

Div 1, Appendix 49(a) says

A designer, engineer, or Certifying Engineer (see 3-2), designated by the Manufacturer, shall be in responsible charge of the design of a pressure vessel that is certified by that Manufacturer.

KEE Engineering meets the qualification a Certifying Engineer and provides all engineering and all non-manual functions for pressure vessel fabrication including design, calculations, drawings, material selection and shop documentation.

Or, per Div 1, KEE Engineering will provide a Certified PE to be in responsible charge of your design team.

Either way, your new pressure vessels will meet the requirements of ASME Section VIII, Division 1, Appendix 47.

If advanced analysis is required, KEE Engineering is qualified to perform the activities in table 47-5-1 including

  • Performance of numerical
  • Varies Fatigue assessments
  • Elastic stress analysis (see ASME Section VIII, Division 2)
  • Elastic–plastic stress analysis (see ASME Section VIII, Division 2)
  • Design due to seismic reactions
  • Linear response history procedure
  • Nonlinear response history procedure
  • Quick-actuating closures
  • Design not specifically addressed in this Division U-2(g)

KEE Engineering will participate in every step of the design process

    Pre-bid assistance
  • Review of client requirements and draft technical inquires as necessary
  • Support pre-bid and post contract award meetings as requested
  • Create preliminary drawings
  • Participate in proposal preparation
    Post Contract Award
  • Attend kickoff meeting
  • Create design calculations to ASME code with Compress software
  • Documentation with Autodesk Inventor software to company’s QA manual
  • Bill of Material (BOM) and purchase specifications
  • Incorporate Client and end user comments into calculations and drawings
    Fabrication Support
  • Design review meeting with fabrication team before release
  • Review of material quotations for technical compliance
  • Review of material test reports (MTRs) for technical compliance
  • Create fabrication tracker and fabrication documentation
  • Response to inquiries regarding drawing during fabrication
  • Evaluation and incorporation of change request during fabrication
  • Preparation of pressure test procedure and records
    Authorized Inspection
  • Conduct pre-review of documents
  • Participate in the Authorized Inspections
  • Create the U1, U5 and U2 manufacturing date forms as required

Div. 1 Appendix 47 Legacy Design

KEE Designs and Calculates to your QA manual with methods you have been using.

Your classical method could be:

  • Hand Calculations
  • Compress® from Codeware
  • PV Elite® from Hexagon
  • Or your other software tools

KEE Engineering will your classic technique or lead your design team with techniques they already use.

Once the design is certified, KEE’s Professional Engineer (PE) and meets Appendix 47requirements, KEE will sign and apply the PE stamp to calculations and drawings.

Appendix 46 allows the use of Division 2 techniques


  • Part 4 Design by rules
  • Part 5 Design by FEA analysis

These techniques can be used to meet special requirements like:

  • Fatigue analysis, or
  • Simplify nozzle connections, or
  • Non-standard designs

KEE’s Certifying Engineer will ensure the Appendix 46 design meets Appendix 47 requirements, sign and apply the PE stamp to calculations and drawings.

KEE Engineering uses state of the art software programs to document design including Compress and non-linear Finite Element Analysis for Division 2 designs.

If your fabrication facility has a Division 1 “U-Stamp” but not a Division 2 “U-2 stamp” KEE’s professional mechanical engineering and quality department can provide teams to upgrade your facility to Division 2.

Division 2 vessels will expand your market and increase your profits because Division 2 vessels are significantly lighter saving on material costs, welding costs and handling costs that far outweigh the additional non-manual costs.

Services offered by KEE Engineering for pressure vessels and heat exchanges include:

  • Division 1 and Division 2 calculations
  • Fabrication Drawings
  • Procurement specifications
  • Evaluation of proposal submittals for code compliance
  • Weld procedures, Procedure qualification and Welder qualification
  • Evaluation of Fabrication change request
  • Pressure testing procedures and documentation
  • Preparation of ASME forms
  • Preparation of documentation for Authorized Inspector (AI)
  • Pre AI-inspection review
  • Manage AI review


Pressure vessel repair is often scheduled during plant outages and the extent of the repair is often discovered during the outage. Proper planning will minimize the potential of costly extension of outage time. KEE Engineering can provide worst case scenario planning during pre-outage planning to ensure that all material, procedures and contractors are available to minimize the time required for unforeseen repairs.

Engineering Support

KEE Engineering’s teams can provided support in the following areas:

  • Engineering scaffolding design as required by OSHA
  • Design of temporary supports with scaffolding or structural steel
  • Pressure test specifications, procedures and documentation
  • Engineered pressure test caps that can be fabricated in the field
  • Critical lift design and documentation
  • Design of special lifting lugs, trunnions, and spreader bars


KEE Engineering uses state of the art parametric solid modeling software and finite element software to optimize design of new products and review for potential improvements to existing products. For new product design, the process shortens the design cycle, ensures designs meet code requirements optimizes fabrication and minimizes the requirements for prototypes. For existing design, KEE Engineering analysis can identify opportunities for costs savings as well as extension of fatigue life and failure analysis.