Looking at https://github.com/poooi/plugin-prophet/blob/master/src/utils/transport.es and I noticed that TP value is merely associated with equipment type: drum=5, DLC=8, t2=2, ration=1. We can probably make this part more future-proof by checking equipment types instead.
In addition there are hints that game client itself does it this way (with the exception of drums for which they simply check for id 75), looking at CellTaskLanding module.