Appendix 46 for External Pressure

Have you started using the Appendix 46 solution for external pressure calculations?

I encourage you to become familiar with the Appendix 46 external pressure solution as the more accurate calculation method provides benefits over the Division 1 solution. Try creating a spreadsheet for the Appendix 46 external pressure method and compare it to the Division 1 solution over a wide range of diameters and materials. This helped build my confidence in the method and will build your confidence too. 

Take a look at this simple 8’ inner diameter carbon steel vessel at 425°F where the Appendix 46 solution passes the vacuum case and the Division 1 solution fails the vacuum case.