Liquid Water - Intergraph Smart Instrumentation - 13.1 - Reference - Hexagon PPM

Integraph Smart Instrumentation Sizing Equations

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English (United States)
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Intergraph Smart Instrumentation
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Reference
Smart Instrumentation Version
13.1
  1. Calculate FF:

  2. Calculate n:

  3. Calculate Kc :

  4. Calculate effective head coefficients:

  5. Calculate first value of CV:

  6. Calculate Fp:

  7. Calculate Kcv:

  8. Calculate FLP:

  9. Calculate Re:

  10. Calculate DPA:

  11. Calculate Fr:

    At this stage, the following cases for different Re are possible:

    1. Case Re< - Laminar flow

    2. Case 56 < Re <40000 - Transitional flow

    3. Case Re>40000 - Turbulent flow

  12. The condition determines:

    Case A - Cavitation and Flashing

    1. Cavitation takes place if P2ñPV, otherwise flashing case takes place.

    2. Calculate new CV.

      ISA Standard:

      IEC Standard:

      Case B (P1 - P2 £ DP A) - Usual

      ISA Standard:

      IEC Standard:

  13. Calculate the relative change in the CV:

  14. Steps 5 to 13 are repeated until the relative change in the CV is less than 0.001.

  15. Define "Incipient" case. The "Incipient" case takes place if

  16. Calculate outlet pipe velocity: