📝 Overview

The Slug Frequency Estimator predicts the rate of slug arrival (slug frequency) in multiphase pipelines. The tool accommodates different methods/codes and offers full unit flexibility for design and troubleshooting.

🧾 Inputs

  • Pipeline Length: m, km, ft, mi (selectable)
  • Superficial Liquid Velocity: m/s, ft/s (selectable)
  • Slug Length: m, ft (selectable)
  • Applicable Method or Code:
    • API RP 14E
    • ISO 13623
    • DNVGL-RP-F110
    • Empirical/Field
  • Output Frequency Unit: slugs/hr, slugs/min, slugs/day

🧮 Calculations

  • Converts all input units to SI for calculations.
  • Slug frequency is calculated as: f=fracVsLsf = \\frac{V_s}{L_s}f=fracVs​Ls​ Where
    VsV_sVs​ = superficial liquid velocity
    LsL_sLs​ = slug length
  • For some codes/methods, additional safety or empirical factors may be included.
  • Flags “Acceptable” or “High Frequency – Review Operations” based on code/method thresholds.

📤 Outputs

  • Acceptance Status: ✅/⚠️ based on method/code guidance
  • Estimated Slug Frequency: In selected unit
  • Input Summary for transparency and traceability