Module 3 Process Piping Hydraulics Sizing And Pressure Rating Pdf //top\\ ❲FRESH ⟶❳

Understanding Process Piping: Hydraulics, Sizing, and Pressure Rating

• Isothermal vs. adiabatic flow assumptions.
• Choked flow and sonic conditions; critical pressure ratio.
• Basic equations for pressure drop in ducts and pipes with high Mach numbers; use of Fanno and Rayleigh line concepts for advanced cases.
• Use of density variation and pseudo-steady approximations for long pipelines.

1. Assume v = 2.5 m/s → ( D = \sqrt(4 \times 150/3600)/(\pi \times 2.5) ) ≈ 0.146 m → NPS 6 (OD=168.3 mm).
2. Internal diameter (Sch 40, wall=7.11 mm) = 168.3 – 2×7.11 = 154.08 mm.
3. Actual v = ( (150/3600) / (\pi \times 0.15408^2 /4) ) = 2.24 m/s (OK).
4. Re = (1000×2.24×0.15408)/(0.000355) ≈ 973,000 (turbulent).
5. Roughness ε = 0.045 mm → ε/D = 0.000292 → f ≈ 0.015.
6. ΔP_friction = ( 0.015 \times (500/0.15408) \times (1000 \times 2.24^2 / 2) ) = 122,300 Pa = 122 kPa.
7. Add 20% minor losses → total ≈ 146 kPa < 250 kPa → OK.
8. Pressure rating: Design P = 1.5 MPa, @80°C S=138 MPa → required t = (1.5×168.3)/(2(138×1×1 + 1.5×0.4)) = 0.91 mm. Sch 40 (7.11 mm) is more than adequate.

Navigating the complexities of industrial systems requires a deep dive into the technical standards that ensure safety and efficiency. This post breaks down the core concepts often found in Isothermal vs

• Properties: density, viscosity, compressibility, vapor pressure.
• Flow regimes: laminar, transitional, turbulent; Reynolds number thresholds and implications for friction and mixing.
• Continuity equation and basic mass/volumetric flow relationships.

Thermal expansion and support considerations Assume v = 2

This guide outlines the critical steps and standards for "Module 3: Process Piping Hydraulics Sizing and Pressure Rating," a fundamental phase in piping engineering that ensures fluid transport is both efficient and safe under operational loads. 1. Hydraulics and Line Sizing Criteria Hydraulic sizing determines the Internal Diameter (ID) Gather basis: fluid properties

1. Gather basis: fluid properties, flow rates, allowable pressure drop, temperature, material constraints.
2. Perform initial sizing using velocity or allowable pressure drop target.
3. Iterate using Darcy–Weisbach with chosen friction factor approximation.
4. Check pressure rating and compute required wall thickness per code.
5. Assess NPSH, pump interaction, and thermal expansion needs.
6. Finalize detailed drawing/specs and run piping stress analysis for loads and supports.
7. Specify testing and inspection requirements.