📝 Overview

The Pipeline MAOP Calculator helps engineers determine the Maximum Allowable Operating Pressure (MAOP) of pipelines based on design code requirements. It allows for quick unit selection and automatically adjusts safety/design factors by code, providing a clear acceptance/rejection status for the input scenario.

🧾 Inputs

  • Outside Diameter: mm or inches (user-selectable)
  • Wall Thickness: mm or inches (user-selectable)
  • SMYS (Yield Strength): MPa or psi (user-selectable)
  • Design Factor (F): Auto-filled by code, editable
  • Weld Joint Factor (E): Auto-filled by code, editable
  • Temperature Derating Factor (T): Auto-filled by code, editable
  • Pipeline Design Code:
    • ASME B31.3
    • ASME B31.4
    • ASME B31.8
    • API 1110
  • Output Pressure Unit: bar, psi, or MPa

🧮 Calculations

  • All input values are converted to SI units internally for consistency.
  • The main calculation (per code) is: textMAOP=frac2tcdotSMYScdotFcdotEDcdotT\\text{MAOP} = \\frac{2 t \\cdot SMYS \\cdot F \\cdot E}{D \\cdot T}textMAOP=frac2tcdotSMYScdotFcdotEDcdotT
    • ttt: Wall thickness (mm)
    • DDD: Outside diameter (mm)
    • SMYSSMYSSMYS: Specified Minimum Yield Strength (MPa)
    • FFF: Design factor (per code)
    • EEE: Weld joint factor
    • TTT: Temperature derating factor
  • The plugin checks if the entered safety/design factors comply with code defaults and flags with a ✅ (acceptable) or ⚠️ (review required).

📤 Outputs

  • Code compliance status: (✅/⚠️)
  • Calculated MAOP in user-selected units
  • Design code and factors used
  • Summary of all calculation inputs