Joat42 wrote:TFLYTSNBN wrote:..snip..
The minimally reliable information available suggests that these plastic pipes might have been filled with "pyrotechnic powder" which could be anything from black powder to flash powder used for theatre productions. I would not say the devices are harmless because they could start a fire, but it appears that they are NOT viable explosives.
As someone that have worked with pyrotechnic powders I know they can remove your limbs as readily as black powder or explosives. The explosives course which is mandatory for handling pyrotechnic powders here had some very graphic demonstrations what these powders can do to bodies (in this case, pig cadavers filled with bags of fake blood).
The most common substance used in pipe-bombs are actually flash powder according to ATF and they are certainly very viable as explosive devices.
I believe that I found your source on ATF data. You are correct on the most common composition of explosive devices being flash powder pyrotechnic mixtures. Pyrotechnic mixures usually contain black powder or recognized explosives that are subjected to ATF regulation. Flash powders can be viable as "explosive devices" If subjected to confinement to boost deflageration velocity. Of course dry ice can be an explosive to, especially when confined in steel pipe.