At max landing weight, 90 tonnes, the Vref30 speed is 132kts. Going up in 20kt increments from this gives a minimum clean speed, at 90 tonnes, of 212kts. The flap limits are as follows:
Flap 1: 240kts
Flap 5: 220kts
Flap 15: 210kts
Flap 20: 195kts
Flap 25: 190kts
Flap 30: 162kts
Flap 15 is normal for takeoff, flap 30 for landing. Flap 25 is seldom used unless you are near the max landing weight and too fast for flap 30.
In our airline we are taught to wait until the speed gets back to the ref speed and then call for flap - they are not to be used as speedbrakes.