Question

cast iron 1m dia is subjected to water hammer pressure of 8 kg/cm2.the max static head on this pipe at its lowest point of enroute is 120m. the suggested thickness of this pipe is

Answer 1

The suggested thickness of the cast iron pipe can be calculated using the formula for hoop stress.

Step-by-step explanation:

The suggested thickness of the cast iron pipe can be calculated using the formula for hoop stress:

σhoop = P × D × t / (2 × S)

Where:

• σhoop is the hoop stress
• P is the pressure
• D is the diameter
• t is the thickness
• S is the ultimate tensile strength of the material

Substituting the given values, we get:

8 kg/cm2 × 1 m × t / (2 × S) = 120 m

Simplifying the equation, we find:

t = 2 × S × 120 m / (8 kg/cm2 × 1 m)

Therefore, the suggested thickness of the pipe is 15 times the ultimate tensile strength of the material divided by 1 kg/cm2.