Question on V-Loops

[NickDePinho]

Why do V-Loops have lower allowable pressures as size increases?

 

[1503-44]

Because size increases.
Consider 2 pipes
One is 10" diameter, one is 20"
Both have walls 1" thick.
Allowable Stress in the walls = 500 psi
Calculate allowable pressure
Take a 1" length of pipe.
Wall Area is 2 walls x 1"wt x 1"length = 2in^2
Stress = PD/2/wt
Stress x 2 x wt / D = P
For 10" pipe
P = 500 x 2 x 1in^2 / 10"D = 100 psig
For 20" pipe
P = 500 x 2 x 1in^2/ 20"D = 50 psig

Larger diameter has a lower Pressure limit.

 

[Snickster]

Are you doing AI again?

 

[LittleInch]

What are V loops??

Never previously heard of such things.

This needs much more information as it currentky makes no sense to me.

 

[1503-44]

No, although I think conversing with AI for long periods of time has had a significant effect on my writing style.

Why do V-Loops have lower allowable pressures as size increases?
Is "Because size increases." not a perfectly logical, if not obvious, answer to the question asked?

I am strangely reminded of Johnny Carson's famous Carnac the Magnificent character.