pic: Team 540 Air Cannon

[Qbranch]

I tried to cut the plastic out for use as a pressure vessel and just use it as a barrel... then use 1~2 of the craftsman pressure tanks instead, and manifold them together (if i use two) to increase the flow rate (they have a single 1/2" port)

However, i keep having trouble figuring out what kind of threads go with what.. NPT, NPTF, BSPT, I seem to go in circles and get confused.

Anybody out there good with pipe threads?

-q

[Herodotus]

This may have been addressed in another thread but couldn't you make the PVC safer by wrapping it in duct tape?Wouldn't give it more strength, but I would think it would prevent sharp shards of PVC from being sprayed everywhere in the case of rupture.

In any case, it's looking pretty good. We worked on an air cannon last year but haven't done any more with it. This year we're doing something else with the pneumatics.

[Protronie]

Originally Posted by Qbranch

I tried to cut the plastic out for use as a pressure vessel and just use it as a barrel... then use 1~2 of the craftsman pressure tanks instead, and manifold them together (if i use two) to increase the flow rate (they have a single 1/2" port)

However, i keep having trouble figuring out what kind of threads go with what.. NPT, NPTF, BSPT, I seem to go in circles and get confused.

Anybody out there good with pipe threads?

-q

Tanks usually (99.9%) come with NPT threads so NPT or NPTF fittings will work with them. FYI NPT & NPTF threads are interchangeable with use of PTFE tape.



Finding fittings that use BSPT threads in the US might be a problem.

Finally my apprenticeship years as a pipe fitter/ boiler operator come in handy here