Input variables

Generic variables

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

Location Class – Location Class
The physical location of the component marked with a classification.
Facility – Facility
The facility under or near which the component is located.
Test medium – Test medium
The medium used to test the component
Design Pressure – P
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 (header/branch)
Name of selected material used for the construction of the component

Specific variables

These variables are component specific

Outside Diameter (tapered) header and (tapered) branch – Dh, Dh, Db, Db
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. Generally the branch is smaller in diameter than the header.
Nominal Thickness (tapered) header and (tapered) branch – thn, th, tbn, tb
Thickness ‘as is’, meaning it is the design thickness taking into account corrosion and tolerance.
Tapered section
Section in which the thickness of either the branch or header gradually changes to the thickness of the pipe.
Corrosion – Ca
Amount of thickness that accounts for the possible effects of corrosions.
Tolerance – tol
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
Half width header direction – W0
Distance from the centerline of the branch part to the end of the header part indicated by the direction.
Half height branch direction – H0
Distance from the centerline of the header part to the end of the branch part indicated by the direction.
Crotch outside radius factor – Rf
Tee transition outside radius factor. Default value is 0.67
Crotch thickness factor – CF
Tee crotch thickness factor. Default value is 1.25
Tee transition outside radius header to branch – r0
Tee crotch outside radius. Radius is calculated or user defined.
Nominal Crotch Thickness – tcn
Crotch thickness is calculated or user defined.
Tee dimensions
Tee dimensions

Calculated Values

Minimum yield strength at 20 °C – S
Stress in the component at which the component starts to plastically deform at 20 °C ambient temperature.
Design factor – F
Factor for the allowable stress when considering underthickness tolerance and maximum allowable depth of imperfections.
Temperature derating factor – T
Factor for the allowable stress when considering high design temperatures
Test design factor – Ft
Factor for the allowable stress when considering underthickness tolerance and maximum allowable depth of imperfections.
Branch/Header diameter ratio – Db/Dh
Ratio of the outside diameters of the branch and the header
Branch inside diameter at header outside diameter – D0
Inside diameter of the branch where the branch meets the outside diameter of the header.
Header reinforcement zone length – r1
Length from the branch centerline to the end of the header reinforcement zone
Branch reinforcement zone length – L
Length from the header outside diameter to the end of the branch reinforcement zone
Reinforcement factor – K
Multiplication factor for the header opening.
Required reinforcement area – AR
The required area that reinforcement or excess thickness should provide.
Total available reinforcement area – A
The total available area from reinforcement and excess 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/MAWP
Ratio of the design pressure to MAWP
Test pressure factor – FPt
Factor for maximum test pressure based on design pressure.
Maximum Allowable Test Pressure – MATP
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 841.32)
Tapering header and branch
The tapering of the header and branch on connecting pipes is checked.

Scope errors

Temperature is out of scope: minimum temperature = -29 °C
This code determines a minimum temperature.
Temperature is out of scope: maximum temperature = 232.22 °C
This code determines a maximum temperature.
Crotch outside radius is out of scope: required is r0minr0r0max.
This code determines limits for the radius.

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 for header
Wall thickness is insufficient to bear the applied loads. Increase the wall thickness of the header.
Insufficient wall thickness for branch
Wall thickness is insufficient to bear the applied loads. Increase the wall thickness of the branch.
Insufficient reinforcement area or wall thickness.
Reinforcement area is too small. Increase the reinforcement area or thickness.

Warnings

Tapering header in reinforced zone.
Indicates tapering of header in reinforced zone.
Tapering branch in reinforced zone.
Indicates tapering of branch in reinforced zone.