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Last Updated: 2020.0

(Fixed, Floating, and U-Tube)

Calculate Welds Using: Select the desired weld design equations. To consider the expanded tube length in lending strength at the joint, select Appendix A.

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Fillet Leg: The length of the fillet weld leg. This only applies to calculations per UW-20.

Design Strength: Applies to UW-20 partial strength welds. This value will be compared with the axial tube strength (Ft) and the lower value will be used in the calculations.

Groove Leg: The length of the groove weld leg

Use qualification test efficiency: Select whether or not to use the qualification test efficiency. This only applies to Appendix A joints.

Joint Efficiency Factor: Reduces the strength of the joint for the calculations. See Table A-2 for more information. This only applies to calculations per UW-20.

fr Basis:  The new options are “Test”, “No Test”, and “Custom”. If “Test” or “No Test” are selected, the design calculations will use the values provided in Table A-2 for fr. A value of zero will be used if the Type Joint is b-1 and the “fr Basis” is “No Test”. If the basis selection is “Custom”, the the value of fr used in the design calculations will be the user input value “fr Custom”. New designs will have this set to “No Test” by default. Designs created before 2020.0 and patched to the current release, will have this field set to “Custom”.

fr Custom: "Joint Efficiency Factor (fr)" has replaced with "fr Custom". This value must be 0 or greater and anything over 1 will be reduced to 1 in the design calculations. The value of fr in the design calculations will be set to this value set to “fr Custom” if the “fr Basis” selection is “Custom”; otherwise this field is ignored in the calculations. New designs will have this set to 0 by default. Designs created before 2020.0 and patched to the current release, will have this field set to the “Joint Efficiency Factor (fr)” value from the older version.

fr(b): Patched and new designs will have this set to 0. This value must be 0 or greater and anything over 1 will be reduced to 1 in the design calculations. This value is only used in design calculations for joint types of f, g or h for Code Years 2019 and later; otherwise the value is ignored.

Use Calculated Po and PT Values: New designs will have this checked by default. Designs created before 2020.0 and patched to the current release, will have this unchecked. If this is checked, the software will use the equations for Po and PT introduced in the 2019 version of Appendix A, otherwise it will use the custom input values “Po Custom” and “PT Custom”. Po and PT are only used for joint types i, j, k for all code years and f, g and h for the 2019 and later code years.

Po Custom:  Po is only used for joint types i, j, k for all code years and f, g and h for the 2019 and later code years. Po will only be set to this value in the design calculations in one of these cases when "Use Calculated Po and PT Values" is checked; otherwise this value is ignored. New designs will have this value set to 1.  Designs created before 2020.0 and patched to the current release will have this value set to "Interface pressure after expanding (Po)" from the older version, unless both Po and PT are zero, then the patch will set it to 1.

PT Custom:  PT is only used joint types i, j, k for all code years and f, g and h for the 2019 and later code years. PT will only be set to this value in the design calculations in one of these cases when "Use Calculated Po and PT Values" is checked; otherwise this value is ignored. New designs will have this value set to -1. Designs created before 2020.0 and patched to the current release will have this value set to "Interface pressure due to thermal growth (Pt)" from the older version, unless both Po and PT are zero, then the patch will set it to -1.

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