Why COMPRESS Includes WRC 107, WRC 297 and FEA

ASME® VIII-1 provides design rules for nozzles subject to pressure. It also requires consideration of external loads such as those imposed by attached piping. The Code does not provide rules for external loads so the methods from WRC 107, WRC 297 and more recently WRC 537 are usually used. An often overlooked issue is that nozzle and attachment sizes frequently fall outside the geometric limits of the WRC 107, WRC 297 and WRC 537 methods. In general, our pressure vessel FEA can be used to meet the requirements of U-2(g) when nozzles and attachments exceed the limitations of WRC 107 \ WRC 297 \ WRC 537, nozzle fatigue analysis is required or more accurate results are needed.

  • Nozzles on heads where the geometry is beyond the limits of shallow shell theory are beyond the scope of the WRC methods. See WRC 537, Appendix A.2 for more details.

  • The TEMA 9th Ed. requires FEA when calculating flexible shell element (FSE) spring rates and stresses. Our heat exchanger calculation includes FSE FEA and performs this analysis automatically.

  • The WRC methods do not cover nozzles on blind flanges or flat heads. API 660 heat exchangers with nozzles on bolted covers can, however, be handled with our built-in FEA.

  • Codeware’s FEA implementation is more accurate and usually less conservative than the methods of WRC 107, WRC 297 or WRC 537. Our FEA engine has been licensed from Paulin Research Group (PRG), a leading authority in the field of pressure vessel and piping stress analysis. PRG’s NozzlePro FEA analysis has been used successfully by industry for decades and is unique in that it has been verified by extensive burst and strain gauge tests.

  • FEA based nozzle fatigue complying with ASME VIII-2 Part 5 design by analysis is included.

  • COMPRESS and INSPECT now provide additional pressure vessel FEA functionality including FEA of clips, lugs, support saddles and structural attachments.

  • Performing FEA with Codeware products is simple. Details input are automatically transferred to the FEA engine and the FEA results are included in the calculation report.

  • COMPRESS and INSPECT include FEA as standard equipment. Competitors either charge extra for this feature or do not offer it at all.

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Nozzle Finite Element Analysis (FEA) is included at no additional charge
COMPRESS and INSPECT feature pressure vessel FEA which includes nozzle fatigue analysis

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