why does some pvc pipe float and some doesnt?

[midnight]

1/2" sinks
1" pipe sinks
2" pipe sinks
3" pipe sinks
4" floats

anyone know anything on this?
or have past experience on it?

 

[green_fox]

i dont know why but those are some interesting findings

 

[midnight]

i dont know why but those are some interesting findings

i think i have some 3" out back somewhere,going to go cut a piece and test it...........

 

[~THEO~]

I had a 90 degree bend that would sink, and a straight piece that would float and i would have to put a rock on it.

I would put it down to how dense the piece is. If an item is less dense then water, it will float.

 

[sellwoc]

I make plastic for a living and and without boring you to tears about it all, it's due to the density and grade of plastic the pipe is made out of. Some being more dense than others and hense it sinks, even if it is the same thickness. The idea behind it all is different grades give different properties. i.e strength, flexability, etc... hope this helps

 

[midnight]

I had a 90 degree bend that would sink, and a straight piece that would float and i would have to put a rock on it.

I would put it down to how dense the piece is. If an item is less dense then water, it will float.

weird
and i had rocks on my pipe but im scared if it comes loose it will shoot up 2 feet and smash the top of the aquarium

and about dense,wouldnt a long 2" piece be more dense then a short 4" piece?
or am i way off?lol


and i just cut some 3" pvc,with a hacksaw,at 1230 in the morning
anyways........3" sinks....

 

[midnight]

oh and its all sch 40 i think

 

[midnight]

just swapped out my 4" pipe for 3"
sux cus its smaller but i dont have to worry about it shooting up and hitting the top.

anyone have experience with 4"?
john,you have 4" or bigger right? how do you make it sink?

 

[~THEO~]

and about dense,wouldnt a long 2" piece be more dense then a short 4" piece?
or am i way off?lol

Density is mass (kg) per unit volume(m3), meaning the ratio of the amount of matter in an object. A rock is very dense because it has a high mass compared to unit volume. Your piping will only sink if its density is greater than that of your water. Pure water has a density of 1000 kg/m3.

So just because an item is larger, doesn't mean it will be more dense.

hope it helps.