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 75 users online :: 3 registered, 0 hidden and 72 guests


Most users ever online was 155 on Mon Aug 15, 2016 1:40 am

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

The Team
Administrators
Global Moderators
global_moderators.png CS

question about HDPE

Post about things you have launched or thought about launching. Also post about various materials used for building cannons. No posts about explosive projectiles!
Sponsored 
  • Author
    Message

question about HDPE

Unread postAuthor: TaBo » Sat Jan 13, 2007 5:51 am

Hi, my name is Elad.
i have question about HDPE pipes..
are they good to use to build combustion spudguns or they too weak?
because i have in my area allot of HDPE pipes and PVC is too expansive for me..
:?
  • 0

Last edited by TaBo on Sat Jan 13, 2007 6:41 am, edited 1 time in total.

TaBo
Private
Private
 
Posts: 23
Joined: Sat Jan 13, 2007 5:41 am
Reputation: 0

Unread postAuthor: killagorrila99 » Sat Jan 13, 2007 6:14 am

HDPE should be fine elad. Cool name.
Maybe even fine for pneumatics www.plasticpipe.org/.../productinfo03_3_1.php
  • 0

"I'm sorry, Mr.Bush cant come to the phone right now, He's playing cleudo with Mr. Cheney And he has him in the Cupboard with a broom stick" -White house receptionist.
User avatar
killagorrila99
Brigadier General
Brigadier General
 
Posts: 1101
Joined: Tue Jul 25, 2006 2:35 am
Location: Australia.
Reputation: 0

Unread postAuthor: TaBo » Sat Jan 13, 2007 6:40 am

thank's dude :)
do you have an idea how to attach 2 kinds of the pipes witch arent the same diameter? i know that in PVC ther is spcial parts but i don't think that in HDPE ther is too...

one more qouestiom about the pipes.
i have some in my street but they are kind of little rounded.
do you or enyone know how to make them be straight?

thank's again
  • 0


TaBo
Private
Private
 
Posts: 23
Joined: Sat Jan 13, 2007 5:41 am
Reputation: 0

Unread postAuthor: killagorrila99 » Tue Jan 16, 2007 2:02 am

I dont think it would be that hard to make straight. And the part for joining 2 sizes is an adapter. Just ask me if you need any more help.
  • 0

"I'm sorry, Mr.Bush cant come to the phone right now, He's playing cleudo with Mr. Cheney And he has him in the Cupboard with a broom stick" -White house receptionist.
User avatar
killagorrila99
Brigadier General
Brigadier General
 
Posts: 1101
Joined: Tue Jul 25, 2006 2:35 am
Location: Australia.
Reputation: 0

Unread postAuthor: boilingleadbath » Tue Jan 16, 2007 4:39 pm

I believe that HDPE is heat-welded, although I geuss it's possible that it uses gaskets.

What this means is that it's really f'ing hard to join... commercialy, I believe they have fancy machines that do it. It may be possible to weld it in the same fashion you would weld steel, but I wouldn't bet on it working well.
(I don't know much about gasket systems... but they don't require welding or such)

...but, yes, HDPE is a good plastic. VERY impact resistant, resistant to fragmentation, very resistant in regards to solvents (which is why you can't solvent weld it), translucent, cheap...
  • 0

User avatar
boilingleadbath
Moderator
Moderator
 
Posts: 1642
Joined: Sat Mar 12, 2005 10:35 pm
Location: Pennsylvania, USA
Reputation: 0

Unread postAuthor: TaBo » Sat Jan 20, 2007 7:03 am

amm ok so it's good to stand in the pressure. but i understood that it's really hard to make them straight. if i will put the pipe, and i will put board on top of it, and then i will put big weight for few days, you'll think that it will work?
  • 0


TaBo
Private
Private
 
Posts: 23
Joined: Sat Jan 13, 2007 5:41 am
Reputation: 0

Unread postAuthor: killagorrila99 » Sun Jan 21, 2007 4:46 am

It should/might/ could, Why not just order some pvc over the internet?
  • 0

"I'm sorry, Mr.Bush cant come to the phone right now, He's playing cleudo with Mr. Cheney And he has him in the Cupboard with a broom stick" -White house receptionist.
User avatar
killagorrila99
Brigadier General
Brigadier General
 
Posts: 1101
Joined: Tue Jul 25, 2006 2:35 am
Location: Australia.
Reputation: 0

Sponsored

Sponsor
 


Unread postAuthor: TaBo » Sat Jan 27, 2007 6:24 am

because in my cuntrey it's expensive.. =\
  • 0


TaBo
Private
Private
 
Posts: 23
Joined: Sat Jan 13, 2007 5:41 am
Reputation: 0

Unread postAuthor: medievalman » Sat Jan 27, 2007 9:09 am

Where do you live?
  • 0

Join the AirAssault Army!

Welcome to Minnesota, Land of 10,000 Lakes, and 10,000,000,000 Mosquitoes.
User avatar
medievalman
Captain
Captain
 
Posts: 319
Joined: Tue Dec 05, 2006 5:52 pm
Location: Central Minnesota
Reputation: 0

Unread postAuthor: Hotwired » Sat Jan 27, 2007 9:18 am

I suspect HDPE is connected much the same way as MDPE which uses compression fittings here: http://www.pipestock.com/MDPE-Compression-Fittings_cp-245/Blackline-16-Bar-Compression-Water-Fittings-For-Irrigation_cp-246/
  • 0

User avatar
Hotwired
Lieutenant General
Lieutenant General
 
Posts: 2599
Joined: Fri Oct 13, 2006 5:51 am
Location: UK
Reputation: 0

Unread postAuthor: TaBo » Sun Jan 28, 2007 3:29 am

Israel.it's something like 5 dollar for one meter of pipe.. it isn't s-o expensive but isn't cheap
  • 0


TaBo
Private
Private
 
Posts: 23
Joined: Sat Jan 13, 2007 5:41 am
Reputation: 0

Unread postAuthor: UKSGC » Sun Jan 28, 2007 4:05 am

I am sure that HDPE is what we use in the UK for underground gas supply pipes.

Its easy the join and to fit bends and Tees to all you need is a bundle of fittings and a fusion welding machine!!!

Its a really clever system, the fittings have coils of wire embedded into them and two terminals on the out side. After a quick wipe off you just slip the fitting on, hook it up to the fusion welder and let it go. Large electrical current heats the wire that melts the pipe and hey presto its fusion welded. Its all controlled and no chance of getting it wrong.
The kit to join this stuff costs thousands sadly and the fittings are in the hundreds each.
  • 0


UKSGC
Specialist
Specialist
 
Posts: 42
Joined: Sun Jan 21, 2007 5:17 pm
Location: Cornwall UK
Reputation: 0

Return to Construction Materials/Ammo Discussion

Who is online

Registered users: Bing [Bot], Google [Bot], Yahoo [Bot]

Reputation System ©'