A filter table is to list different components, such as pipe, fittings, flanges and reducers. The best and easiest way to filter all of these components is the filter definition via spec header geometrics. See the screenshot below.
The spec header filter normally filters several different specification items that can have different allowed nominal sizes; thus, the filter only works for schedules and not for nominal sizes. If nominal size and schedule filtering is required for a component, it must be filtered by the spec item filter.
Select the Filter check box for the filter table defined in spec header geometrics.
It is very important that all spec items to be filtered by the spec header geometric filter table have the Geometric 1 field at spec item level empty. This rule defines for any specification item an exception filter table simply by assigning a different filter table to the specification item record.
The filter result is shown in the next screen shot.
The idents shown above are now reduced by the filter table to one unique ident per nominal size.
Using the same process described, items with two sizes also can be filtered based on the following rule:
The schedule filter uses the filter nominal sizes for the nominal size 1 and nominal size 2. Using this rule, all items filtered will have the same schedule per nominal size regardless if it is the first or second size.
The following examples explains this rule and filtering method.
The same filter table is valid that was used for the pipe.
The selected specification item is an eccentric reducer with the following idents:
The table below shows that a successful filter match occurs only if the NPS/SCH pairs for sizes "1" and "2" match the filter table. The matching lines ("Y") show that the reducer automatically follows the standard schedule table with its schedules.