The inclusion of Code Case 2901 into ASME Section VIII, Div 1 & 2 has had a significant impact on flange design & analysis, specifically for assessing weld neck flanges under external loads. This change has brought a new leakage-based method which varies from the traditional stress-based methods widely known in the field today.

In our webinar Flange Design & Analysis, our engineers from CEI, Finglow, and Paulin Research Group help to clarify these methodologies, while demonstrating the solutions we offer that streamline code-compliant flange design and analysis.

Overview

• This is a joint-product webinar over DesignCalcs, Finglow, and FlangePRO from Paulin Research Group.
• In each solution, our presenters demo a complete flange design per ASME Section VIII, Div 1, ASME Section VIII, Div 2, EN 13445, and EN 1591.
• We cover leakage-based methodologies as well as discuss the usefulness of finite element analysis (FEA) for leak prediction.
• We explore several methods (from stress to leakage-based analysis types) for evaluating external loads on flanges including Koves, Kellogg, UG-44(b), and more (see below for the full list).

Methods

• UG-44(b): This method equates to 4.16.12 and the original CC 2901. Based on Dr. Warren Brown's paper "Improved Analysis of External Loads on Flanged Joints."
• CC 2901-1: This is available in supplement 4 of the 2023 BPV VIIII Code Cases. Also based on Dr. Brown's paper.
  
• Koves: In this discussion, it refers to the 2005 PVP "Design for Leaking in Flanged Joints Under External Loads" paper.
• Kellogg: This is the commonly known equivalent pressure method used by many. 
• EN 1591: This is the same as EN 13445-3 Annex G that is based on the Wölfel method.
• Taylor Forge: The ASME S8D1 and S8D2 methods are primarily based on "Taylor Forge Bulletin 502." EN 13445 Section 11 is as well.
• FEA: Is the methodology for predicting an object's behavior based on calculations made with the finite element method (FEM).
  
  

Flange Design & Analysis Benefits

By using the flange solutions from CEI, Finglow, and Paulin Research Group, the average user can:

• Rapidly design and verify flange components against standards like ASME Section VIII (Div 1 & 2), EN 13445, and EN 1591.
• Utilize the latest methodologies, including UG-44(b), Code Case 2901-1, Koves, Kellogg, EN 1591, and FEA, to accurately assess external flange loads and ensure compliance with pressure rating criteria.
• Reduce emissions and environmental impact with automatic gasket behavior analysis per EN 13445 Annex G.
• Address designs outside typical standardized codes using FEA to analyze overturning moments, torque between flanges, and account for thermal differentials where insulation is lacking. Also, FlangePRO quantifies high stresses and flange stiffness, helping to prevent leaks with FEA.

FAQs and More Training Opportunities

 We had a handful of questions during the webinar. As a courtesy, we provided a FAQ resource. You can access it here.

Looking for more virtual opportunities for online welding and design software training?

Every quarter we host code-centric and specific training opportunities for PVP engineers and designers to grow in their knowledge or to satisfy a professional learning requirement. To sign up for our next training in September of 2024, click here.

Consider The ThinkTank Academy. Our very own software learning platform allows you to stay up-to-date with Appendix 47 compliance with comprehensive training in ProWrite, DesignCalcs, Finglow, NozzlePRO, FEATools, and FEPipe straight from the creators themselves. It's simple:

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• Work through the lessons at your own pace.
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