Change in penstock thickness

[ingsergiogarro]

Good morning

We have a doubt concerning a change in penstock thickness. Here is the sequence from uphill to downhill:

Diameter: 102"
Lenght: 209ft
Thickness: 36,51mm
Slope: 24°

Then an bend

Diameter: 86"
Lenght: 177ft
Thickness: 31,75mm
Slope: 20°

Then a trifurcation and then the Power House.

Does it makes any sense the change in the pensctock thickness? From 36,51 to 31,75 where the pressure increases and the diameter decreases?

Thanks

 

[racookpe1978]

OK.

So, now, you should calculate the stress in the steel at both diameters.

 

[ColonelSanders83]

Follow racookpe1978's advice, this will answer your question and with any luck your understanding of the issue will increase.

A question properly stated is a problem half solved.

Always remember, free advice is worth exactly what you pay for it!

http://www.ap-dynamics.ab.ca/