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 36 users online :: 4 registered, 0 hidden and 32 guests


Most users ever online was 106 on Sat Jun 14, 2014 4:35 pm

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

The Team
Administrators
Global Moderators
global_moderators.png CS

Pressure rating for soda bottles

A place to ask general spud cannon related questions.
Sponsored 
  • Author
    Message

Pressure rating for soda bottles

Unread postAuthor: blind909 » Fri Aug 03, 2007 7:12 pm

Can someone give me the pressure rating of a plastic coke bottle, sorry im a bit of a noob.
  • 0

User avatar
blind909
Brigadier General
Brigadier General
 
Posts: 828
Joined: Thu Aug 02, 2007 6:06 pm
Location: Las Vegas, NV
Reputation: 1

Unread postAuthor: hi » Fri Aug 03, 2007 7:16 pm

its not rated. its made to hold soda and not much else.

some people say they are good to about 120 psi. im sure it will hold it, but i really dont tust it and i personally dont think it is smart.

the way i see it is that plumming parts are cheap and a foot of pvc costs the same for a bottle of coke.
  • 0

"physics, gravity, and law enforcement are the only things that prevent me from operating at my full potential" - not sure, but i like the quote

you know you are not an engineer if you have to remind yourself "left loosy righty tighty"
User avatar
hi
Major General
Major General
 
Posts: 1619
Joined: Thu Feb 01, 2007 9:28 pm
Reputation: 0

Unread postAuthor: Insomniac » Fri Aug 03, 2007 7:19 pm

Soda bottles don't have a pressure rating, but I have tested some to 100psi, so it should be pretty safe for 60-80psi. Just remember to ALWAYS use bottles that held a fizzy drink (water bottles are bad). Also, the coca cola branded bottles tend to be thicker than the other ones I've seen. It's a good idea to test any bottle before you use it. Just fill it to the brim with water and pressurise, that way, if it bursts, the amount of stored energy will be small. And welcome to Spudfiles!
  • 0

I wonder how much deeper the ocean would be without sponges.
Right now I'm having amnesia and deja vu at the same time. I think I've forgotten this before.

Add me on msn!!! insomniac-55@hotmail.com
User avatar
Insomniac
Major General
Major General
 
Posts: 1297
Joined: Mon Dec 18, 2006 3:47 pm
Location: Australia
Country: Australia (au)
Reputation: 0

Unread postAuthor: blind909 » Fri Aug 03, 2007 7:20 pm

I am only filling it too 35 psi, it is alot lighter than pvc and is for a bbmg, so I should be ok, and thanks.
  • 0

User avatar
blind909
Brigadier General
Brigadier General
 
Posts: 828
Joined: Thu Aug 02, 2007 6:06 pm
Location: Las Vegas, NV
Reputation: 1

Unread postAuthor: SpudBlaster15 » Fri Aug 03, 2007 7:51 pm

Plastic drink bottles are usually pressurized to ~50-60psi before sale, so you should be fine to pressurize them to 35psi.
  • 0

People should not be afraid of their governments. Governments should be afraid of their people.
User avatar
SpudBlaster15
Major General
Major General
 
Posts: 2378
Joined: Wed Oct 18, 2006 11:12 pm
Location: Canada
Country: Poland (pl)
Reputation: 1

Unread postAuthor: blind909 » Fri Aug 03, 2007 8:29 pm

Thanks man, so I will be fine.
  • 0

User avatar
blind909
Brigadier General
Brigadier General
 
Posts: 828
Joined: Thu Aug 02, 2007 6:06 pm
Location: Las Vegas, NV
Reputation: 1

Unread postAuthor: mtronic » Fri Aug 03, 2007 10:18 pm

I have taken a 2ltr coke bottle to 140psi but I wouldn't go any higher than that and wouldn't do it often.
  • 0

User avatar
mtronic
1st Lieutenant
1st Lieutenant
 
Posts: 292
Joined: Sat Jun 23, 2007 6:21 am
Location: everywhere at once
Reputation: 0

Sponsored

Sponsor
 


Unread postAuthor: sandman » Fri Aug 03, 2007 10:33 pm

mythbusters exploded one at 150 so you are very safe at 35
  • 0


sandman
Colonel
Colonel
 
Posts: 672
Joined: Thu Mar 15, 2007 6:59 pm
Reputation: 0

Unread postAuthor: mopherman » Fri Aug 03, 2007 10:38 pm

sandman wrote:mythbusters exploded one at 150 so you are very safe at 35

mythbusters is a cool show, but dont use them as a source of info for spudguns. remember the giant ball valve cannon? inconsistant opening times and a horrible cb ratio made it a horrible cannon for testing.

back on topic: yeah its safe up to about 50 psi.
  • 0

searching for a modern day savior from another place,inclined toward charity,everyone's begging for an answer,without regard to validity,the searching never ends,it goes on and on for eternity
-Bad religion
User avatar
mopherman
Brigadier General
Brigadier General
 
Posts: 788
Joined: Sat Feb 03, 2007 8:20 pm
Reputation: 0

Unread postAuthor: 666lucky693 » Fri Aug 03, 2007 10:43 pm

ive taken one up to 145 thats about all that i would trust it to but they are fine i made many cannons with them it and they were fine
  • 0

User avatar
666lucky693
Master Sergeant
Master Sergeant
 
Posts: 169
Joined: Sun Dec 03, 2006 5:46 pm
Reputation: 0

Unread postAuthor: dauphinoise potato » Sat Aug 04, 2007 7:40 am

I got bored one day and took a evian water bottle to over 120psi, very loud bang :lol:
  • 0

It's all a bunch of tree huggin' hippie crap!
User avatar
dauphinoise potato
Staff Sergeant
Staff Sergeant
 
Posts: 105
Joined: Sun Jul 15, 2007 8:36 am
Reputation: 0

Unread postAuthor: jimmy101 » Sat Aug 04, 2007 2:38 pm

Plastic soda bottles for carbonated beverages most definitely are pressure rated. Get off you behind and do some googling.
  • 0

Image

jimmy101
Lieutenant General
Lieutenant General
 
Posts: 3059
Joined: Wed Mar 28, 2007 9:48 am
Location: Greenwood, Indiana
Country: United States (us)
Reputation: 5

Unread postAuthor: joannaardway » Sun Aug 05, 2007 7:22 am

I wouldn't say that drinks bottles are "pressure rated" - I'd say pressure tested.

Being technical, a rating is when a manufacturer has certified the product for use at a pressure. Coke don't naturally certify their bottles (that's asking for trouble), but can be coerced into giving information about what they've been tested to.

I'd personally be confident with a tough, non-collapsable (the evian bottles are specifically designed to be crushed to recycle) bottle at up to 100-120 psi.

They share the quality of ABS that should they fail, they tend to tear rather than shatter, which means that should anything go wrong, you'll just be short of hearing for a short while - unless you're holding your head to it.
  • 0

Novacastrian: How about use whatever the heck you can get your hands on?
frankrede: Well then I guess it won't matter when you decide to drink bleach because your out of kool-aid.
...I'm sorry, but that made my year.
User avatar
joannaardway
Brigadier General
Brigadier General
 
Posts: 949
Joined: Mon Oct 09, 2006 4:57 pm
Location: SW Hertfordshire, England, UK.
Reputation: 0

Unread postAuthor: jackssmirkingrevenge » Sun Aug 05, 2007 7:35 am

joannaardway wrote:Being technical, a rating is when a manufacturer has certified the product for use at a pressure. Coke don't naturally certify their bottles (that's asking for trouble), but can be coerced into giving information about what they've been tested to.


Having worked in the quality control lab of a well known beverage manufacturer, I can vouch for the pressure testing of PET bottles used for non-carbonated beverages (Iced Tea etc.) - naturally not all blown bottles are tested, a sample from each mould is taken at regular intervals and the bottle is tested to failure in a sealed pressure-tester.

Typical failure figures are just over 300 psi for 0.5 litre bottles and just under 200 psi for 1.5 litre bottles. Bottles designed for non-carbonated beverages such as bottled water fail at much lower pressures, typically below 100 psi. As a general rule, the smaller the bottle, the higher the pressure it can take.

Note also that quality varies from bottle to bottle - look at the little teat at the base of the bottle, if it appears too thick then it's a likely point of failure.
  • 0

User avatar
jackssmirkingrevenge
Donating Member
Donating Member
 
Posts: 23898
Joined: Thu Mar 15, 2007 11:28 pm
Location: epoxy batcave
Reputation: 49

Unread postAuthor: jimmy101 » Sun Aug 05, 2007 5:29 pm

I knew there was somebody on the board that new about pressure testing of plastic bottles.

There is really very little difference between pressure testing and pressure rating unless you're being picky.

"Pressure testing" is the act of collecting data. "Pressure rating" is what you get after the testing data has been examined by statisticians and lawyers. "If 99.9% of the bottle don't fail under conditions X, the cost of a failure is $Y, we sell 4 zillion bottles a year, therefore our liability will be ..."

I'm sure that the Coca Cola™ company tells their bottle manufacturer that the nominal pressure at normal temperature is such and such. But, the bottle must not fail at the pressure it'll have at 150 F, or something like that. The inside of a car will easily hit 150 F on a hot sunny day. I'm also sure there is a many page document that specifies in gory detail the failure statistics at various pressures and temperatures.

Naturally, bottlers are not interested in telling anybody what the actual testing data is or what the derived ratings are. Why should they? It would just be ammo for liability lawyers.
  • 0

Image

jimmy101
Lieutenant General
Lieutenant General
 
Posts: 3059
Joined: Wed Mar 28, 2007 9:48 am
Location: Greenwood, Indiana
Country: United States (us)
Reputation: 5

Next

Return to General Spud Cannon Related

Who is online

Registered users: Bing [Bot], Google [Bot], Google Adsense [Bot], matti

Reputation System ©'