Pressure load on element-based surface? or converting element-based surface to geometric surface to apply pressure in abaqus?

I would like to use pressure load on a element based surface, in Abaqus. This surface is a combination of small surface elements (in an orphan mesh). But to apply pressure load you need to have a geometic surface.

How can I do this? Is it possible to make a geometric surface using this element-based surface?

Regards,

Omid