Input variables
Generic variables
These variables can be found in virtually all reports as input variables
- Design Pressure – Pd
- Pressure assumed to be present in the component according to the design terms
- Design Temperature – Td
- Temperature assumed to be present in the component according to the design terms
- Material
- Name of selected material used for the construction of the component
Specific variables
These variables are component specific
- Outside Diameter – De
- Outside diameter of the attached part. The diameter runs from the outside of the wall to the opposite outside of the wall, through the center of the circle.
- Nominal Thickness – dn
- Thickness ‘as is’, meaning it is the design thickness taking into account corrosion and tolerance.
- Corrosion – Ca
- Amount of thickness that accounts for the possible effects of corrosions.
- Tolerance – tol
- Tolerance in thickness for production
- Strength reduction coefficient – z
- Effectiveness of the strength, depending on whether joints are seamless, welded, or expected to perform worse than the base material properties
- Length tangent to tangent – L
- Length of the straight part of the pipe (equals the unsupported length of the pipe)

Pipe
Calculated Values
- Allowable Stress at Temperature – f
- Stress in the component at which it is still allowed (without failure) to use the component
- Allowable stress at 20 °C – ft
- Stress in the component at which it is still allowed (without failure) to use the component at 20 °C ambient temperature
- Nominal Required Thickness – drn
- Based on the input, this is the calculated thickness that is required to sustain the loads. The nominal value should be smaller than the nominal design thickness.
- Minimum strength reduction coefficient isolated openings – zmin
- Minimum required effectiveness of the strength in the opening.
- Minimum distance isolated openings – l3
- Minimum required distance between openings to consider them isolated. See D0501.
- Maximum unreinforced opening diameter – Max(Di2, D'i2)
- Maximum allowed diameter for an opening without reinforcement. See D0501.
- Maximum Allowable Working Pressure – MAWP
- The maximum pressure at which the component can be used in operation. This value should be larger than the design pressure.
- Design margin – Pd / MAWP
- Ratio of the design pressure to MAWP
- Maximum Allowable Test Pressure – MATP
- The maximum pressure at which the component should be tested and survive.
Scope errors
- Design temperature material is out of scope.
- The material properties are not available at the design temperature.
- Wall thickness is out of scope: required d ≤ 0.3 Di
- This code determines for pipes a maximum thickness.
- Wall thickness cone is out of scope: required d ≤ 0.3 Di / Cos(α)
- This code determines for cones a maximum thickness.
- Cone angle is out of scope: required α ≤ 70°
- This code determines a maximum cone angle.
Errors
- Can’t find material ‘MaterialName’ in database
- Material could not be found in database. Select an existing material name, or select another material via the material selection window.
- Insufficient wall thickness
- Wall thickness is insufficient to bear the applied loads. Increase the wall thickness.