A cylindrical tank is required to contain a gage pressure 670 kPakPa. The tank is to be made of A516 grade 60 steel with a maximum allowable normal stress of 150 MPaMPa. If the inner diameter of the tank is 2 mm, what is the minimum thickness, tt, of the wall

The minimum thickness t of the wall is 0.00446 mm

Explanation:

Solution

Given that

Pressure = 670kPa = 0.670

σ allowable normal stress = 150 MPa

Inner diameter = 2mm

Steel = A516 grade 60

Now,

Since the hoop stress is twice the longitudinal stress, the cylindrical tank is more likely to fail from the hoop stress.

Thus

σ allowable = σₙ = pμ/t

=p (d/2)

150 MPa = 0.670MPa * 2/2/t

=0.67/t

t=0.67/150

t = 0.00446 mm