Safety With Depressurizing Propane Tanks

Originally Posted by 406Refining

Hey all, I recently did a large scrap pickup from a new customer. He asked me if I recycled the small coleman propane tanks. I said yes and now have several dozen of these little tanks. From your experiences what is the best way to safely vent these tanks? I was planning on punching a hole in the side, but was wondering if there is a better/safer way to dispose of them. Thanks.

An old boss of mine had some. If I remember correctly, there is a round depression on the side near the top. He just pounded a nail into that spot.