Input variables

Generic variables

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

Design Pressure – P
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.
Weld fitting option – W
Is the fitting welded

Specific variables

These variables are component specific.

Large/Small
Large and Small refer to the large pipe end and the smaller (reduced) pipe end respectively.
Outside Diameter – Do (Large/Small)
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 – tn (Large/Small)
Thickness ‘as is’, meaning it is the design thickness taking into account corrosion and tolerance.
Corrosion – A
Amount of thickness that accounts for the possible effects of corrosions.
Tolerance – tol (Large/Small)
Tolerance in thickness for production.
Joint Efficiency – E
Effectiveness of the strength, depending on whether joints are seamless, welded, or expected to perform worse than the base material properties.
Overall length – L
Length of the entire reducer.
Length conical part – Lc
Length of the part that reduces gradually in diameter and hence, forms a conical shape.
Angle cone – α
The angle of the conical section, or the slope with which the diameter reduces.
Concentric reducer
Concentric reducer
Concentric reducer dimensions
Concentric reducer dimensions
Eccentric reducer
Eccentric reducer
Eccentric reducer dimensions
Eccentric reducer dimensions

Calculated Values

Allowable Operating Stress – S
Stress in the component at which it is still allowed (without failure) to use the component.
Allowable stress at 20 °C – Sa
Stress in the component at which it is still allowed (without failure) to use the component at 20 °C ambient temperature.
Minimum yield strength at 20 °C – Symin
Stress in the component at which the component starts to plastically deform at 20 °C ambient temperature.
Allowable stress test – St
Stress in the component at which it is still allowed (without failure) to use the component at testing condition.
Weld joint strength reduction – W
Factor by which the allowable strength is reduced in order to accommodate the reduction in strength in the welded joint.
Nominal Required Thickness – trn (Large/Small)
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 (Large/Small)
The maximum pressure at which the component can be used in operation. This value should be larger than the design pressure.
Design margin – P/MAWP (Large/Small)
Ratio of the design pressure to MAWP
Maximum Allowable Test Pressure – MATP (Large/Small)
The maximum pressure at which the component should be tested and survive.
Required Test Pressure – Pt
Required hydrostatic pressure for testing at any point in the piping system (paragraph 137.4.5)

Scope errors

Pressure for steam/vapor is out of scope: minimum pressure = 0.1 MPa
This code determines for steam/vapor a minimum pressure.
Pressure for water is out of scope: minimum pressure = 1.103 MPa
This code determines for water a minimum pressure.
Temperature for water is out of scope: minimum temperature = 100 °C
This code determines for water a minimum temperature.
Reducer angle is out of scope: maximum angle = 30°
This code determines a maximum reducer 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 at large end.
Wall thickness is insufficient to bear the applied loads. Increase the wall thickness.
Insufficient wall thickness at small end.
Wall thickness is insufficient to bear the applied loads. Increase the wall thickness.