smartcooky
Penultimate Amazing
No, that is not silly. It is aggravating as all hell to see people on Twitter and Facebook who go on an on about firearms, even those who damn well do know better, say things such as the highlighted.
Things like the explosives in fireworks, black powder, and smokeless powder must be stored in containers made specifically for them to be fairly safe, and storing them in a PVC tube can easily result in an explosion. The risk is highest with the firework explosive, then black powder, then the smokeless (smokeless has a higher ignition temp). The risk is greatest with the dust coming off the grains like is produced from agitation.
PVC pipes tend to create static very readily. Those explosives are easily set off from such a spark. Depending on the amount, the perp is either lucky or had grounded the pipes so they didn't explode on pouring, seeing as I doubt he kept his work area clean (one of the best ways to cut down on the risk).
As I said before, if one pours such explosives into a PVC pipe, one has created a bomb whether or not one intended to.
This part of the risk cannot be underestimated. You do not even have to have explosive material for suspended dust grains to cause an explosion. Even flour dust will explode...
Pouring/Putting explosive powder into ANY kind of plastic pipe, especially PVC which is really prone to static build-up and discharge, is a very risky thing to to.