PCalc and HP 50g: Internal Pressure in a Vessel

I = inner radius of the vessel

O = outer radius of the vessel

P = pressure of the water flow

σh = hoop stress

σh = P * (O^2 + I^2)/(O^2 - I^2)

Source: Goswami, Indramil Ph.D. P.E. "All In One Civil Engineering PE Breadth and Depth Exam Guide" 2nd Edition. McGraw Hill: 2012

PCalc: Pressure In A Vessel

Store the following:

I → M1

O → M2

P → M3

Decimal Mode

Set R1 To M1

R1 To Power of 2

Set R2 To M2

R2 To Power of 2

Set X To R1

Add R2 To X

Set R0 To R1

Subtract R2 From R0

Divide X By R0

Multiply X By M3

HP 50g: VESSEL

<< "Inner Radius" PROMPT

"Outer Radius" PROMPT

"Pressure" PROMPT

→ I O P

<< O SQ I SQ DUP2

+ UNROT - / P * →NUM

"σh" →TAG >> >>

Example:

O = 3/8 in = .375 in

I = 3/32 in = .09375 in

P = 10 lb/(s*in^2)

Result:

σh ≈ 11.3333 lb/(s*in^2)

- Eddie -

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