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a cylindrical tank is required to contain a gage pressure 770 kpa . the tank is to be made of a516 grade 60 steel with a maximum allowable normal stress of 150 mpa . if the inner diameter of the tank is 3 m , what is the minimum thickness, t , of the wall?

Respuesta :

Answer:

The minimum thickness (t) = 7.7 mm

Explanation:

Gauge pressure (P)=770 kpa  

Allowable normal stress =150 Mpa.  

Inner diameter of tank =3m.  

Minimum thickness of wall. = ?

We can have two cases if there is a closed cylinder

the first being Circumferential stress with the other being  longitudinal stress.

According to circumferential stress

σ= pd/2t

Where

p=pressure,

d=diameter,

t= thickness,

then we substitute to make t the subject,

t=pd/2σ

t=770×10^3×3/2×150×10^6

t = 7.7 mm

minimum thickness (t) = 7.7 mm

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