The pyrotechnics industry also highly discourages using PVC pipe. When PVC fails, it shatters and creates splintered shrapnel which can seriously injur or kill someone. They use EPDM pipe or fiberglass for mortar tubes from 1.75" up to 12" diameter (for the big 4th of July shows). EPDM pipe is more expensive and a little harder to find that PVC pipe, but fails in a more ductile (vs. brittle) manner.
http://www.pyrouniverse.com/FAQ.htm#9 (this has some good examples of failed PVC pipe)
This is for information only. I don't encourage anyone to build a t-shirt canon with any plastic.
Quote:
Originally Posted by hrench
Also, if you don't want liability, don't build a t-shirt launcher. The purpose of this machine is to aim projectiles at the crowd.
Projectiles are dangerous and litigious.
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