Input variables

Generic variables

These variables can be found in virtually all reports as input variables

Design Pressure – P_c: Pressure assumed to be present in the component according to the design terms
Design Temperature – T: 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

These variables are component specific

Outside Diameter – D_o: 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 – e_n: Thickness ‘as is’, meaning it is the design thickness taking into account corrosion and tolerance.
Corrosion – c₀: Amount of thickness that accounts for the possible effects of corrosions.
Tolerance – c₁: Tolerance in thickness for production
Joint 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

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 – f_t: Stress in the component at which it is still allowed (without failure) to use the component at testing condition.
Nominal Required Thickness – e_rn: 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.
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 – P_c/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.

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.

Shell is thick walled when D_o/D_i > 1.7: The stress analysis of a thick walled cylinder is different than that of a thin walled cylinder.