Login    Register
User Information
Username:
Password:
We are a free and open
community, all are welcome.
Click here to Register
Sponsored
Who is online

In total there are 45 users online :: 5 registered, 0 hidden and 40 guests


Most users ever online was 218 on Wed Dec 07, 2016 6:58 pm

Registered users: Bing [Bot], Google [Bot], Google Adsense [Bot], MSNbot Media, Yahoo [Bot] based on users active over the past 5 minutes

The Team
Administrators
Global Moderators
global_moderators.png CS

Dive Tank Holding area

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
Sponsored 
  • Author
    Message

Unread postAuthor: caspar97 » Fri Jul 16, 2010 8:53 am

Thanks for that, we most likely will be launching pvc or metal rockets, and to my post above the one about distance, not speed, any ideas?
  • 0

Beware the lollipop of mediocrity. Lick it once and you'll suck forever. -Brian Wilson

caspar97
Private First Class
Private First Class
 
Posts: 39
Joined: Sat Jun 12, 2010 8:19 am
Reputation: 0

Unread postAuthor: Technician1002 » Fri Jul 16, 2010 10:34 am

-_- wrote:ive been looking for one of the bigger size fire extingsher to power my soon to come semi. at the maket i allways see 10L stainless steel LPG tanks, do you think they could hold 350psi.


In the USA, the working pressure (rated pressure) is 260 PSI. Refillable tanks that are designed to be transported full on US highways (DOT regulation) has a minimum burst pressure of 4X the working pressure. I do not know other countries safety regulations.

For fire safety, the safety relief valve is supposed to remain sealed at pressures below 300 PSI so they don't leak in hot weather.

Technically 350PSI is overpressure for a BBQ tank, but under the minimum burst pressure. I do not know the ratings for one time use tanks such as torch and lantern tanks. It's a pretty safe bet that a new one would hold 350 PSI, but they are not designed for anything but Propane. Moisture in the air may cause rusting on the inside.

At below the working pressure, the tanks even when shot with a high power rifle round only get a hole, but not blow up. At higher pressure, they may rupture violently when shot.
  • 0

User avatar
Technician1002
Chief of Staff
Chief of Staff
 
Posts: 5190
Joined: Sat Apr 04, 2009 11:10 am
Reputation: 14

Unread postAuthor: c11man » Fri Jul 16, 2010 11:39 am

i take my propane tank up to 350psi but i coated theinside with paint to prevent rust from moisture. it is a LOT of air in that tank...
  • 0

User avatar
c11man
Brigadier General
Brigadier General
 
Posts: 783
Joined: Fri Feb 06, 2009 4:37 pm
Location: Wisconsin, USA
Country: United States (us)
Reputation: 0

Unread postAuthor: Technician1002 » Fri Jul 16, 2010 11:43 am

That is below the minimum burst pressure, but above the nominal (rated) pressure for that tank. If the tank fails at that pressure (gunshot, rust, dent, accident, etc) it may fail violently. It should not burst from just pressure.
  • 0

User avatar
Technician1002
Chief of Staff
Chief of Staff
 
Posts: 5190
Joined: Sat Apr 04, 2009 11:10 am
Reputation: 14

Unread postAuthor: caspar97 » Fri Jul 16, 2010 12:08 pm

Do you think that are any ways to keep the original fittings on the dive tank, because one of the reasons we choose a Scuba tank is the easy and cheap refillability
  • 0

Beware the lollipop of mediocrity. Lick it once and you'll suck forever. -Brian Wilson

caspar97
Private First Class
Private First Class
 
Posts: 39
Joined: Sat Jun 12, 2010 8:19 am
Reputation: 0

Unread postAuthor: c11man » Fri Jul 16, 2010 12:13 pm

yes there are ways to keep the original vavle on the tank so can you get it filled. you just have to find the right adaptor to go to npt threads
  • 0

User avatar
c11man
Brigadier General
Brigadier General
 
Posts: 783
Joined: Fri Feb 06, 2009 4:37 pm
Location: Wisconsin, USA
Country: United States (us)
Reputation: 0

Unread postAuthor: caspar97 » Fri Jul 16, 2010 12:19 pm

Much thanks to all. I might add more once i start building it.
  • 0

Beware the lollipop of mediocrity. Lick it once and you'll suck forever. -Brian Wilson

caspar97
Private First Class
Private First Class
 
Posts: 39
Joined: Sat Jun 12, 2010 8:19 am
Reputation: 0

Sponsored

Sponsor
 


Unread postAuthor: Crna Legija » Fri Jul 16, 2010 8:24 pm

the one i always see is stainless steel so it cant rust.
  • 0

Attachments
swde.jpg
its like this one but my dad made it into a bbq on the back it has burst @ 6.5 mpa thats about 1000psi
'' To alcohol... The cause of, and solution to, all of life's problems.”
--Homer Simpson

Add me on ps3: wannafuk, 8/11/11 cant wait
User avatar
Crna Legija
Major General
Major General
 
Posts: 2333
Joined: Sun Jul 20, 2008 5:14 am
Location: australia
Reputation: 0

Unread postAuthor: Clarke » Wed Jul 21, 2010 12:30 am

You should look at investing in one of these adapters.

http://www.palmer-pursuit.com/cart/inde ... cts_id=225

It looks as though it is a yoke valve adapter and has a pressure adjuster and gauge on the side which means you could have both the reg and adapter in one. Connected to that you could hook up a hose with a ball valve to fill your gun as you said and read of the pressure gauge. You should drop them and e-mail and ask some details.
  • 0


Clarke
Specialist
Specialist
 
Posts: 41
Joined: Sat Apr 04, 2009 6:24 pm
Reputation: 0

Previous

Return to Pneumatic Cannon Discussion

Who is online

Registered users: Bing [Bot], Google [Bot], Google Adsense [Bot], MSNbot Media, Yahoo [Bot]

Reputation System ©'