max pressure for 4" SCH 40 pipe?

[A-98]

exactly what the topic says. i think its something like 110 PSI

[mark.f]

Actually double that... 220.

[A-98]

i might be totally wrong, but isnt the max psi of 1" 440, and then roughly 2" would be 220, and 4" would be 110.

i would be really happy if you were right instead of me

[noname]

Do you really think 1" PVC will hold up to 440 psi? No. 4" is probably fine at up to 150, but there isn't really any ratio between pipe sizes.

[Velocity]

1" SCH 40 PVC pipe is rated to 450 PSI
2" SCH 40 PVC pipe is rated to 280 PSI
4" SCH 40 PVC pipe is rated to 220 PSI

Check it out <a href="http://www.harvel.com/pipepvc-sch40-80-dim.asp">here</a>

By the way, he didn't ever mention that this was PVC pipe, now did he ?

[A-98]

well, i learned something new today!

i said it was SCH 40....so that kind of implies that its PVC

[trae08]

NO you can get steel or iron pipe in sch of 40 80 an 120. i know that for a fact cause im gonna be buying a 4" sch 120 piece of black steel 18" long

[frankrede]

well, i learned something new today!

i said it was SCH 40....so that kind of implies that its PVC

Balderash, sch-40 is found on almost all pipes.(non-sdr)

[BC Pneumatics]

A-98 You are an idiot.
noname You are an idiot.

A-98: Not only does sch 40 not mean it is PVC, it doesn't mean it is even pressure rated at all. Only pipe labeled nsf-PW is pressure rated.
sch 40 is used to identify the thickness of PVC, Steel, Iron, Stainless, ABS, and various other types of pipe. Therefore, you are twice times an idiot. (In this topic alone)

noname: 1" sch 40 PVC nsf-PW pipe will hold more than 440psi. It is rated at 450psi, meaning it is likely capable of holding over 1,000psi. Burst pressures are much higher than rated pressures.
There is a ratio for pipe thickness, diameter, and pressure rating. One variable remains the same, while two change based on it, and a PVC constant. In the schedule system, the thickness is constant. In the SDR system, rating is constant.
You are also twice an idiot.

In summation, you two need to shape up and get some brain activity and research going.

[noname]

Have you tried putting 1" Sch 40 PVC to 440 psi? If so, and it didn't explode, then I'll delete my post.
I've had 3/4" Sch 40 PVC (rated to 480 psi) explode at only 140, so I use a safety factor of 90 psi max on any and all of my guns.
If there's a ratio between pressure ratings and pipe sizes and schedules, I'd like to see it and test it, to disprove my idiocy.

[frankrede]

Have you tried putting 1" Sch 40 PVC to 440 psi? If so, and it didn't explode, then I'll delete my post.
I've had 3/4" Sch 40 PVC (rated to 480 psi) explode at only 140, so I use a safety factor of 90 psi max on any and all of my guns.
If there's a ratio between pressure ratings and pipe sizes and schedules, I'd like to see it and test it, to disprove my idiocy.

If teh pipe can't take taht pressure then it wouldn't be rated to it.
Your pipe was probably defective or damaged.
I have noticed that alot of smaller diameter pipe isn't in the best chape in all of the hardware stores I have been to(warped, some discoloration.)

[BC Pneumatics]

Have you tried putting 1" Sch 40 PVC to 440 psi? If so, and it didn't explode, then I'll delete my post.

Actually, I have pressurized it to somewhere around 540psi. (600psi micro gauges aren't terribly accurate)
Delete away, my moronic friend.

I've had 3/4" Sch 40 PVC (rated to 480 psi) explode at only 140, so I use a safety factor of 90 psi max on any and all of my guns.

Frankly, I don't care what you have had happen, or rather, what you say you've had happen. Someone who comes across as ignorant as you cannot be trusted to speak the truth, or to even know how to keep pipe in proper, safe, condition.

If there's a ratio between pressure ratings and pipe sizes and schedules, I'd like to see it

There is. It is known as the Standard Dimension Ratio.
I will go into more depth if you want, but there is plenty of information out there for anyone that wants to do a little research.

and test it, to disprove my idiocy.

In hopes of saving you some trouble, I took the liberty of making a little formula for you.
(OD/Wall Thickness)X(Pressure Rating)=(~4200)
I'm not sure whether or not you want to 'test it' though, since it will only prove your idiocy.

Now, stop making yourself look more and more like a brainless dumbass.

[noname]

Since you say it's true about the 1" PVC, you can delete my post, we don't have an edit button any more.
The 3/4" PVC DID explode, it could have had small deformations in the pipe, but not enough for me to notice, and I have 20/20 vision, and it was in perfect condition, and the temperature was around 80 degrees F, normal in CA.
I used your formula. It didn't work.
(1.05/.24) x 480=622.2222222, not 4200, or anywhere close.
As of now, I'm done on this topic.

[BC Pneumatics]

By the pressure rating, I am assuming you are trying to calculate for 3/4" sch 40?
OD=1.05" Wall Thickness=0.113" Pressure Rating=480psi
1.05/0.113=9.29
9.29*480=4460
4460~4200

Frankly, I don't know how that was so fuc</i>king hard for you.

It gets more accurate with larger pipe diameters as well. Likely becasue of significant digits.