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 51 users online :: 6 registered, 0 hidden and 45 guests


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

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

The Team
Administrators
Global Moderators
global_moderators.png CS

Galvanised steel?

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

Galvanised steel?

Unread postAuthor: subxa001 » Mon Feb 01, 2010 12:30 am

Hey I've got a question before I begin my pneumatic build, has anyone used this type of metal with their cannon? What exactly are its pressure properties as in advantages and disadvantages?

Thanks in advance.
  • 0


subxa001
Private
Private
 
Posts: 2
Joined: Mon Feb 01, 2010 12:26 am
Reputation: 0

Unread postAuthor: D_Hall » Mon Feb 01, 2010 1:04 am

Sure, I've done it.

Pressure ratings vary with pipe size and schedule.

Advantages are strength (compared to PVC) and impact resistance.

Disadvantage is weight and you shouldn't really weld it (if you're going with steel, might as well go black, not galvanized).
  • 0

Simulation geek (GGDT / HGDT) and designer of Vera.
User avatar
D_Hall
Donating Member
Donating Member
 
Posts: 1760
Joined: Thu Feb 07, 2008 7:37 pm
Location: SoCal
Reputation: 6

Unread postAuthor: subxa001 » Mon Feb 01, 2010 1:24 am

The label at the hardware store says "GALV PIPE PIECE 5ZZ PP20 X 550MM" does that give any indication on the pressure rating?
  • 0


subxa001
Private
Private
 
Posts: 2
Joined: Mon Feb 01, 2010 12:26 am
Reputation: 0

Unread postAuthor: chinnerz » Mon Feb 01, 2010 1:48 am

what pressure are you thinking?
  • 0

User avatar
chinnerz
Lieutenant Colonel
Lieutenant Colonel
 
Posts: 470
Joined: Mon Dec 28, 2009 8:08 am
Reputation: 0

Unread postAuthor: kenbo0422 » Mon Feb 01, 2010 6:43 am

Normally, the hardware stores will sell sch 40. Ask about it before you buy. It seems that the fittings for most of those are actually rated higher than the pipe itself, so go with the pipe rating. If the '20' is your diameter, then you probably have about a 3/4" pipe.

Here is some pipe info for standard wrought steel pipe (sch 40)

Pipe Dimension
(inches) Bursting Pressure(psi) Working Pressure(psi)
1/2 10380 1300
3/4 8610 1080
1 8090 1010
1 1/4 6745 840
1 1/2 6100 760
2 5185 650
2 1/2 5650 710
3 4940 620
3 1/2 5610 700
4 5270 660
5 4630 580
6 4220 530
7 3940 490
8 3720 470
9 3540 445
10 3380 420
12 2930 370

edit: in the finished message this 'chart' doesn't keep the columns lined up, but I think you can still see the information OK.
  • 0

User avatar
kenbo0422
2nd Lieutenant
2nd Lieutenant
 
Posts: 201
Joined: Mon Oct 06, 2008 7:33 am
Location: East Tennessee
Reputation: 0

Unread postAuthor: Gippeto » Mon Feb 01, 2010 12:35 pm

  • 0

"It could be that the purpose of your life is to serve as a warning to others" – unknown

Liberalism is a mental disorder, reality is it's cure.
User avatar
Gippeto
Donating Member
Donating Member
 
Posts: 2394
Joined: Sat Jan 19, 2008 10:14 am
Location: The Great White North...Canada eh!
Reputation: 11

Unread postAuthor: Hubb » Mon Feb 01, 2010 2:55 pm

In my sig is a link to the Hubb Library. If you follow it, you will find a portable tank calculator. In it, I've put together pipe information, which includes the type you are asking about. It shows the pressure rating, which will give you an idea.

D_Hall pretty much covered the advantages / disadvantages of it. But, for the record, I've used Sch40 galv pipe (1") with unregulated CO2 with no problems.
  • 0

User avatar
Hubb
Major General
Major General
 
Posts: 2390
Joined: Mon May 28, 2007 8:39 am
Location: South Georgia
Reputation: 2

Sponsored

Sponsor
 


Return to Pneumatic Cannon Discussion

Who is online

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

Reputation System ©'