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Do one of the following:
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On the Instrument Index Module window menu bar, select Tables > Lines.
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On the Process Data Module window toolbar, select
to open the Select Line dialog.
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From the Line type list, select a line type.
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Select a line and select Properties.
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On the Line Properties dialog, in the Pipe Spec column of the data window, select the pipe spec definition and press the Delete key.
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Select OK to return to the Select Line dialog.
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This procedure only allows you do dissociate a pipe spec from one line at a time. If you want dissociate this pipe spec from all lines, you can open the process data sheet for a specific line, make sure that the Pipe spec box is empty, and then copy line data to other lines.
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You do not delete the pipe spec itself, only dissociate it from the line. The dissociated pipe spec remains in the Pie Specs supporting table. If you want to delete a pipe spec permanently, you must delete it from the supporting table.
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Dissociating a pipe spec from a line does not dissociate this pipe spec from instruments.