What’s New in Piping Integrity Management

API 574 Piping Structural Minimum Thickness Values

You’re invited to join us on June 17 for a comprehensive overview of the latest changes in API RP 574 related to structural minimum thickness requirements. Don’t miss your opportunity to hear about the changes from Kraig Shipley, who is technical support for the development of the new structural minimum thickness rules for API 574.

Tuesday, June 17, 2025

11:00 AM – 1:00 PM, boxed lunch provided

San Jacinto College, Central Campus
LyondellBasell Center for Petrochemical, Energy, & Technology
Building 45 (Rooms 1003 & 1005)
7901 Fairmont Pkwy.
Pasadena, TX 77507

Update to API 574 Piping T_STRUCT Values

To manage piping systems for safe operation, an active mechanical integrity program needs to focus on piping inspection and provide guidance on acceptable limits for the piping thickness readings being obtained. Unlike vessels, piping- required structural minimum thickness is not solely governed by stress due to pressure only, but can also be governed by external loading on the piping system due to various sources.  

Kraig Shipley will provide background on recent work completed by Equity Engineering to establish structural minimum thickness values for piping with documented assumptions and methodology and explain how results compare with existing structural minimum thickness provided in API 574.

Background of existing structural minimum thickness values in API 574
Methodology of the new changes to API 574 structural minimum thickness values
Assumptions and their impacts on study results
Overview of results and conclusions

Kraig Shipley, P.E.

Piping & Fired Heaters; Principal Engineer II

Kraig Shipley has worked as a refinery, corporate, and consulting engineer over his 34 years in the petrochemical industry and provided on-site field engineering support for over 35 turnarounds. He has extended equipment run times through API 579 FFS evaluations typically applied to ASME VIII-1 and VIII-2 vessels, and B31.3 piping systems. He is the Piping SME at Equity Engineering responsible for the development of over 100 engineering specifications, 200 piping classes, and 1000 valve data sheets. Kraig is an active member of the ASME B31.3 Process Piping Code and a prior chairman of the ASME B31.3 Design Task Group.

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Who is Equity?

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We are focused on the safe and reliable operations of industrial equipment. We look at the whole picture and develop solutions that are purpose-fit for your unique needs. We are unified, collaborative, and proactive.

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