Tmin Calculations

Calculate MAWP as per the location using different standard formulae.

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Calculate TMIN per locations with various standard formulas

Note: You can find the calculations in the CORE Inspection App, but we also provide working calculations below.

CYLINDRICAL SHELLS INSIDE RADIUS T=PR /SE=0.6P

Design Pressure (P) Inside Radius of shell (R) Maximum Allowable Stress (S) Joint Efficiency (E) Minimum Required
Thickness (T)

Imperial

psi

inches

psi

inches

Metrics

bar

CYLINDRICAL SHELLS INSIDE RADIUS DIVISION 2 T=R(EXP(P/SE) - 1)

Design Pressure (P) Inside Radius of shell (R) Maximum Allowable Stress (S) Joint Efficiency (E) Minimum Required
Thickness (T)

Imperial

psi

inches

psi

inches

Metrics

bar

CYLINDRICAL SHELLS OUTSIDE RADIUS T=PR/SE+0.4P

Design Pressure (P) Outside Radius of shell (R) Maximum Allowable Stress (S) Joint Efficiency (E) Minimum Required
Thickness (T)

Imperial

psi

inches

psi

inches

Metrics

bar

FORMED ELLIPSODIAL HEADS, PRESSURE ON CONCAVE SIDE INSIDE RADIUS T=PD/2SE-0.2P

Design Pressure (P) Inside Diametr head skirt (D) Maximum Allowable Stress (S) Joint Efficiency (E) Minimum Required
Thickness (T)

Imperial

psi

inches

psi

inches

Metrics

bar

FORMED ELLIPSODIAL HEADS, PRESSURE ON CONCAVE SIDE OUTSIDE RADIUS T=PD/2SE=1.8P

Design Pressure (P) Outside Diametr head skirt (D) Maximum Allowable Stress (S) Joint Efficiency (E) Minimum Required
Thickness (T)

Imperial

psi

inches

psi

inches

Metrics

bar

STRAIGHT PIPE UNDER INTERNAL PRESSURE T=PD/2(SE+PY)

Internal Design Gage Pressure (P) Outside Diameter of Pipe (D) Maximum Allowable Stress
excluding quality or joint factors (SE) Ferritic Steels (Y) Minimum Required
Thickness (T)

Imperial

psi

inches

psi

inches

Metrics

bar

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