How do I know if PVC is pressure rated?

Mr.Russ · Wed Jan 31, 2007 1:27 am

well the title speaks for itself, I have some 40mm pvc pipe that i wish to use for a chamber, my dad for it from his work(trade site) and i dont know what it is pressure rated to, and i dont know the schedule of it

Could someone please help me?

thanks

A-98 · Wed Jan 31, 2007 1:31 am

well, if you know its pressure rated than you should be good...there is a table on the Wiki somewhere...

Mr.Russ · Wed Jan 31, 2007 1:35 am

But i dont know if its pressure rated...

ill check on wiki

Pete Zaria · Wed Jan 31, 2007 2:06 am

The pipe and fittings should say NSF-PW , not NSF-DWV on them. Frequently the pipe has a pressure rating (i.e., 220 PSI) written on it.The fittings should have long, deep sockets.

Peace,
Pete Zaria.

Mr.Russ · Wed Jan 31, 2007 2:10 am

well....... i dont know the fittings, they have no writing on them and i will check the pipe for the rating. thanks

EDIT: just checked, its just plain blank PVC

maz oner · Wed Jan 31, 2007 2:41 am

if its thick white pipe its usoaly pressure rated if its slightly grey ish and feels pretty light its usoaly dwv
that is if theres nothing written on it

Mr.Russ · Wed Jan 31, 2007 2:54 am

well i have white pipe, thats one inch wide and has 2mm walls

the 40mm stuff has 2 mm walls and is slightly darker white

joannaardway · Wed Jan 31, 2007 4:16 am

That sounds like it's BAD pipe. I wouldn't risk using it myself.

2mm is almost nothing, even on 1 inch pipe.

Mr.Russ · Wed Jan 31, 2007 4:20 am

alright, thanks for your help. I've been using a coke bottle and charging it up to 40 psi without it exploding... if you drip it your screwed though.

What would the difference be between a coke bottle and this 40mm? I wouldnt be charging it that high psi either, 40psi works fine for what im using it for

maz oner · Wed Jan 31, 2007 7:20 am

a coke bottle can be safely pumped to 100 psi (i have always been to scared though) as long as its in good condition and thats 600 ml, dont know bout the others but ur 1 in pipe actoaly does sound like pressure pipe as i have one on my gum nut cannon ( as barrel ). but u can always take a little bit to a hard where store and see what fittings it takes because dwv will not fit into pressure fittings as they are slightly smaller
hope this helps

peace

frankrede · Wed Jan 31, 2007 8:00 am

Pressure rated pipe carries both the nsf-pw and nsf-dwv label.
And non-pressure pipe does fit pressure rated fittings.

maz oner · Wed Jan 31, 2007 8:05 am

oh tru sorry

jut none of my non pressure pipe will fit any of my pressure fittings and i cant find any at my hardware store or any in wa but then again is australia

Check out my YouTube SpudGun Channel! · Wed Jan 31, 2007 3:54 pm

Guys, Read! He said 40mm,meaning its in metric also meaning its not from the States, also meaing it wont have sch.40 or NSF-PW on it.
If its blank, that usally means its down pipe.Im guessing your from Aussie as your using metric? Pressure rated pipe in Aussie and New Zealand will look like this somewhat....

DN40(Diameter Number 40mm) XXXXX(jargon letters/numbers) PN18(Pressure Number 18 - which is 18BAR/1800kPa/1.8mPa which is about 260psi).
The stuff that is in bold is what is usally on the pipe, there is probably more but I cant remeber it all. If it just has 'DN40' or DWV on it it is not presure rated. I havn't seen pipe with both DWV and PN18 on it,so if it dont have 'PNXX' on it dont use it. Also sometimes there is pipe that just haves 'PN" on it no number, Ive only found this on pipe over 100mm and its usally grey.