|This task explains the welding design rule.|
|The welding design
rule included with this application is used to determine the type of weld
that should be placed between two parts. (For Piping Design it will also
calculate the offset - see below.)
This is a specification-related design rule and the associated table is located in the directory ...\intel_a\Startup\EquipmentAndSystems\XXXXX\Specification where XXXXX is the application name, such as Tubing.
|1.||The image below shows the welding
design table for the Tubing Design product. Tables for other applications
will have different entries but function in the manner described below.
The first five columns in the table contain the input values: EndStyle1, EndStyle2, MinWallThickness, MaxWallThickness and FabricationSite. EndStyle1 is data from one part connector while EndStyle2 is data from the second part connector. Only one value is input for wall thickness - the columns MinWallThickness and MaxWallThickness constitute a range, inclusive of the values in the two columns. Wall thickness from each of the connectors must fall within this range. The value for the column FabricationSite is obtained from the Shop Fabrication design table.
If a user builds the Shop Fabrication table incorrectly, as a result of which the welding rule table gets both entries (shop and field), the first entry that it receives will be entered in the Fabrication Site field.
When all values match the input values, the table outputs the Weld Type. The value for weld type is used by the parts placement process to correctly select a weld.
You can enter any weld type keyword value relevant to your project in the WeldType column.
|2.||For Piping Design,
the rule also calculates the weld offset, which is necessary when placing a
branch. An offset is the distance between the center line of the main pipe
and the ends of the branch being placed. The offset value is used during
parts placement to position the weld correctly with respect to the main
pipe and branch. The weld gap that is defined on the weld is used to
calculate the offset value, using the formulae shown below. Three kinds of
end style are supported in the sample weld rules provided with this
application: stub-on, stub-in and set-on.
Calculation of the offset is hard coded in the application.
The default calculation is:
If you want to change the default calculation you must implement a routine (CAA Interface) named CATICloAppWeldOffset.
You can add more weld end styles. To do this you must:
To sum up the process for calculating a Piping offset: