My compressor use is limited to using a carry tank for filling tires and very small brad-nailing jobs. The tank used to scare me, thinking of the energy contained in 125 lb of compressed air. And now I see that my tank has an "expiration date" (already passed) embossed on it. And I'll get rid of it if it is a danger. But I was thinking--what does happen if the tank fails? It's not like a bomb, where there is a near-instantaneous increase in pressure that tears the tank apart. It seems to me that what is likely to happen is rust will create a thin spot that will eventually fail, releasing rather unspectacularly all the air in the tank.
Is there any safety risk in using an "expired" tank?