Beside the usual graphic editing and simulation facilities, the software tool Tina may build a number of state space abstractions for Petri nets or Time Petri nets, preserving certain classes of properties. For Petri nets, these abstractions help preventing combinatorial explosion and rely on so-called partial order techniques such as covering steps and/or persistent sets. For Time Petri nets, that have in general infinite state spaces, they provide finite representation of their behavior, in terms of state class graphs.