Free Tools
Pipeline Engineering Toolkit
Practical calculators for integrity, hydraulics, flow assurance and operations — free to use, no sign-up required. All results are indicative; confirm with applicable codes and project requirements.
Integrity & Design
Barlow MAOP & Wall Thickness
Calculate maximum allowable operating pressure or required wall thickness using Barlow's formula with design, joint and temperature derating factors.
P = 2·S·F·E·T·t / (OD − 2t)
e.g. 0.72 for B31.8 Class 1
Results
- MAOP (MPa)
- 16.35 MPa
- MAOP (bar)
- 163.5 bar
- MAOP (psig)
- 2371 psig
- Hoop stress at MAOP
- 298.1 MPa
Indicative calculation only. Verify against applicable code (ASME B31.4, B31.8, etc.) and project-specific requirements.
Integrity & Design
Corrosion Remaining Life
Simple linear remaining life estimate based on measured wall thickness, retirement limit and corrosion rate.
t_remaining = (t_measured − t_required) / CR
Retirement or code minimum
Results
- Remaining life
- 23.2 years
- Projected thickness today
- 8.26 mm
- Status
- Acceptable
Screening tool only. Does not replace fitness-for-service assessment, probabilistic analysis or code-compliant remaining life calculations.
Flow & Hydraulics
Reynolds Number & Flow Regime
Determine Reynolds number and flow regime (laminar, transitional, turbulent) from pipeline flow rate and fluid properties.
Re = ρ·v·D / μ
Water ~0.001; crude ~0.005–0.05
Results
- Reynolds number
- 116072
- Flow regime
- Turbulent
- Average velocity
- 2.64 m/s
Flow & Hydraulics
Pipeline Volume & Inventory
Calculate internal pipeline volume and estimate liquid or gas inventory at operating conditions.
V = π·(ID/2)²·L
Results
- Internal volume (m³)
- 1317.1 m³
- Internal volume (bbl)
- 8285 bbl
- Internal volume (kL)
- 1317.1 kL
- Liquid inventory
- 1120 tonnes
Gas inventory uses ideal-gas approximation with compressibility factor Z. For custody transfer or detailed inventory, use rigorous PVT modelling.
Flow & Hydraulics
Pressure Drop (Darcy-Weisbach)
Estimate single-phase friction pressure loss using the Darcy-Weisbach equation with Swamee-Jain friction factor.
ΔP = f · (L/D) · (ρ·v²/2)
~0.05 mm for clean steel
Results
- Pressure drop (bar)
- 42.20 bar
- Pressure drop (kPa)
- 4219.7 kPa
- Pressure drop (psi)
- 612.0 psi
- Equivalent head
- 506.2 m
- Friction factor (f)
- 0.0185
- Reynolds number
- 116072
- Average velocity
- 2.64 m/s
Single-phase, steady-state estimate. Does not account for elevation, fittings, transient effects or multiphase behaviour.
Flow Assurance
Hydrate Equilibrium Temperature
Screening estimate of hydrate formation temperature for sweet natural gas at a given pressure. Compare against operating temperature to assess risk margin.
Relative to air (~0.55–0.75)
For margin calculation
Results
- Equilibrium temp (°C)
- 36.4 °C
- Equilibrium temp (°F)
- 97.5 °F
- Operating margin
- -11.4 °C
- Hydrate risk
- High
Indicative screening tool only. Does not replace rigorous EOS-based flow assurance modelling, inhibitor dosing calculations or operating envelope development.
Operations & Pigging
Pig Velocity Estimator
Estimate pig travel speed from pipeline flow rate. Useful for run planning, receiver sizing and batching operations.
v_pig ≈ Q / (A · fill fraction)
1.0 for liquid-full; reduce for gas/liquid or partial fill
Results
- Pig velocity (m/s)
- 10.54 m/s
- Pig velocity (km/h)
- 38.0 km/h
- Pig velocity (ft/s)
- 34.6 ft/s
- Assessment
- High — check pig manufacturer limits
Actual pig speed may differ due to slip, bypass, wax/debris build-up or multiphase flow. Always confirm with operational data.
Utilities
Engineering Unit Converter
Convert common pipeline engineering units for pressure, flow, temperature and length.
Conversion
- 100 Pa
- 0.1 kPa
Need a detailed engineering assessment?
These tools are for quick screening. For code-compliant design, flow assurance studies or integrity assessments, our engineers can support your project directly.