Hi Ian,
Thank you for asking. Here in Poland it is quite common that EPC, design offices, even workshops and small engineering teams have to follow requirements of orderers. So, piping systems or their parts are being design in.... here is the list that contains e.g. AutoPLANT, SmartPlant, PDMS, Inventor (!), Solidworks, OpenPlant and others, sometimes quite exotic. To simplify the workshop/erection and other ISO documents creation of the same look, feel and content - we would like to use OpenPlant Isometric Manager, no matter what system is used for modelling plant.