📝 Overview

The Flowline Insulation Assessment tool estimates temperature loss in subsea or onshore flowlines based on geometry, insulation, and thermal conditions. It helps you check if insulation is sufficient to meet code or project thermal requirements, with clear acceptance logic and unit flexibility.

🧾 Inputs

  • Pipe Length: m, km, ft, miles (selectable)
  • Pipe Outside Diameter: mm, inches (selectable)
  • Insulation Thickness: mm, inches (selectable)
  • Thermal Conductivity of Insulation: W/m·K, BTU/hr·ft·°F
  • Fluid Inlet Temperature: °C, °F (selectable)
  • Seawater/Ambient Temperature: °C, °F (selectable)
  • Design Code:
    • ISO 13623
    • DNVGL-RP-F110
    • Shell DEP
  • Output Temperature Unit: °C, °F

🧮 Calculations

  • All values are converted to SI units internally.
  • The tool uses a simplified 1D heat conduction formula to estimate the temperature drop: Q=frac2piLlambda(Tin−Tamb)lnleft(fracD+2tDright)Q = \\frac{2 \\pi L \\lambda (T_{in} – T_{amb})}{\\ln\\left(\\frac{D + 2t}{D}\\right)}Q=frac2piLlambda(Tin​−Tamb​)lnleft(fracD+2tDright) and provides an estimated outlet temperature (assuming worst-case conduction and no heat gain from the fluid).
  • Acceptance is flagged as:
    • ✅ ACCEPTABLE if the estimated outlet temperature is more than 10°C above ambient.
    • ⚠️ High Heat Loss if margin is less than 10°C, suggesting a need to review insulation.

📤 Outputs

  • Acceptance Status: ✅/⚠️ (based on thermal margin)
  • Estimated Outlet Temperature (in selected unit)
  • Summary of all key input parameters