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PI System Management Tools

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StmEng_TPS

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  • Last UpdatedSep 17, 2025
  • 1 minute read

Calculates the steam temperature as a function of pressure and entropy—all variables expressed in English units. Use for both superheated or wet steam.

Format

StmEng_TPS(P, S)

Arguments

  • P

    Pressure of the steam in psia. The valid range is 0.08865 to 14503.77 psia.

  • S

    Specific entropy of the steam in BTU/lbm/R. The valid range is -3.691353466E-05 to 1.67208 BTU/lbm/R.

Returns

Computed steam temperature in °F or Error digital state.

Sample Values

Pressure

Entropy

Temperature

State

300.

1.7964

998.8

Superheated

800.

1.6807

998.8.

Superheated

1400.

1.6096

999.1

Superheated

5000.

1.4001

999.5

Superheated

300.

1.4183

417.37

90 % vapor

Note: Even if the input entropy is less than that of the saturated liquid, the function still returns the saturated temperature as the answer without setting an error state.