CADWorx Plant I tab: Bolt > Auto Gasket 
Plant Menu: Utility > Drawing Control > Auto Gasket
Command line: AUTOGASKET
Places a gasket on flange sets, and valves.
Automatic
Places a gasket into the drawing automatically.
Manual
Places a gasket into the drawing manually.
This option can also be set with a piping rule. For more information, see Piping Rules.