Question

Find SWP of a boiler 72 inches in diameter, thickness of one-half inch, tensile strength of 55,000 pounds, quadruple riveted butt and strap joint (.94) factor of safety 5:

a) 14.3
b) 143.6
c) 1436

Answer 1

To find the SWP of a boiler, use the formula SWP = (Tensile Strength * Safety Factor) / (2 * Thickness). Plug in the given values to calculate the SWP, which is 275,000 psi in this case.

Step-by-step explanation:

To find the Safe Working Pressure (SWP) of a boiler, we need to calculate the maximum allowable stress and then divide it by the thickness. The formula to calculate the SWP is SWP = (Tensile Strength * Safety Factor) / (2 * Thickness).

In this case, the Tensile Strength is given as 55,000 pounds, the Safety Factor is 5, and the Thickness is half an inch.

Plugging in the values, we get SWP = (55,000 * 5) / (2 * 0.5) = 275,000 / 1 = 275,000 pounds per square inch (psi).

Therefore, the SWP of the boiler is 275,000 psi.