THRE circular requirements
- Last UpdatedApr 14, 2025
- 2 minute read
This topic describes the specification requirements for circular three-way (THRE) components.
Parameter description requirements
-
Parameter #1 = Width of arrive
-
Parameter #2 = Width of branch
Data set requirements
For information about data set requirements that apply for all circular components, refer to Circular component requirements.
The following requirements are in addition to the data references that are created for parameters.
|
KEY |
Type |
Description |
Default ( /Expression **) |
|
SHAP |
Null |
Duct shape |
‘CIRC’ |
|
AARR |
Distance |
Width of arrive |
PARA[1 ] |
|
BARR |
Distance |
Height of arrive |
0 |
|
ALEA |
Distance |
Width of leave |
PARA[1 ] |
|
BLEA |
Distance |
Height of leave |
0 |
|
ABRA |
Distance |
Width of branch |
PARA[2 ] |
|
BBRA |
Distance |
Height of branch |
0 |
** Where the Default value is set to a parameter, the Expression value must be set to the same parameter. This is applicable for all component types.
P-point requirements
For information about P-point requirements that apply for all circular components, refer to Circular component requirements.
The P-point P3 defines the position, direction, and size of the three-way off-leg, and the required attribute settings.
The following table shows the additional required P-points:
|
Type |
Connection Type (PCON) |
Bore (PBOR) |
Axis Direction (PAXI) |
PZ Axis (PZAXI) |
Point Width (PWID) |
PDShape attribute |
AllAngle attribute |
|
|---|---|---|---|---|---|---|---|---|
|
1 |
PTAX |
CIRC |
(RPRO AARR + RPRO BARR) |
-Z |
Y |
(RPRO AARR + RPRO BARR) |
CIRC |
1 |
|
2 |
PTAX |
CIRC |
(RPRO ALEA + RPRO BLEA) |
Z |
Y |
(RPRO ALEA + RPRO BLEA) |
CIRC |
1 |
|
3 |
PTAX |
CIRC |
(RPRO ABRA + RPRO BBRA) |
X |
Y |
(RPRO ABRA + RPRO BBRA) |
CIRC |
1 |
|
61 |
PTMI |
0 |
0 |
Y |
unset |
unset |
0 |
unset |
|
62 |
PTMI |
0 |
0 |
Y |
unset |
unset |
0 |
unset |
|
63 |
PTMI |
0 |
0 |
Y |
unset |
unset |
0 |
unset |
|
64 |
PTMI |
0 |
0 |
Y |
unset |
unset |
0 |
unset |
The P-points are arranged as shown in the following graphic:
Specification requirements
The following specification headings are required:
-
Type (TYPE)
-
Duct Shape (PSHA)
-
Duct Width 1 (PWID1)
-
Duct Height 1 (PHEI1) = 0
-
Duct Width 3 (PWID3)
-
Duct Height 3 (PHEI3) = 0
Duct Width 3 and Duct Height 3 are used to describe the offline connection.