This week’s photo is a bit different. It is from my archives and one I use in my Flammable Liquids training courses. For those of have attended my training courses or a PHA’s on a flammable liquids process have seen my video of a very similar “tank launching” incident. The picture shows what happens when a flammable liquid tank emergency relief system fails. I this case, it was a weak seam roof design failure – the bottom seam (welded) was weaker than the top seam (welded) and thus we have “lift-off”! Can make for a really bad day!