blow off

The radioactivity was released when they blew off steam from the containment vessel.

The engine or steamer is blowing off.

Women have strong ones and men blow off far more often. It's a biological fact.

I decided to blow off the meeting and leave early.

Her leg was blown off by a landmine.

In order to deal with deposits of soot on boiler-tubes while running, especially if poor coal is in use, locomotives are often now provided with blowers on the firebox back-plate which can be made to discharge a jet of high pressure steam towards the firebox tubeplates; this has the effect of loosening and blowing off the soot deposits.