Module 3 Process Piping Hydraulics Sizing — And Pressure Rating Pdf

Whether you are studying for an exam or designing a real chemical plant, always remember: Run both calculations, iterate, and never trust a pipe size that hasn’t been checked for erosion velocity and code-required thickness.

[ t = \fracP \cdot D2(SEW + PY) ]

Try 6-inch Sch 40: ID = 6.065 in = 0.5054 ft. Area = 0.2006 ft². Velocity = (500 gpm * 0.002228 ft³/s/gpm) / 0.2006 = 5.55 ft/s (acceptable). Re = (62.4 * 5.55 * 0.5054) / (1 * 0.000672) = ~260,000 (turbulent). Friction factor f (from Moody, ε=0.00015 ft) ≈ 0.017. Head loss hf = 0.017 * (500/0.5054) * (5.55²/(2*32.2)) = 8.1 ft. ΔP = 8.1 ft * 0.433 psi/ft = 3.5 psi. That’s well under 15 psi. Try 4-inch Sch 40: ID = 4.026 in, v = 12.3 ft/s (high but possible). hf ≈ 26 ft → ΔP = 11.3 psi (acceptable). → Select 4-inch Sch 40. Whether you are studying for an exam or

[ Q = A_1 v_1 = A_2 v_2 ]

This article is designed to serve as an educational resource and a guide for engineers, students, and technicians looking for structured content similar to what might be found in a technical training module. Introduction: The Backbone of Industrial Design In the world of chemical, petrochemical, and oil & gas engineering, piping systems are often called the "circulatory system" of a plant. Just as the human heart must pump blood through arteries of the correct diameter and strength, industrial pumps must move fluids through pipes of the right size and pressure rating. Velocity = (500 gpm * 0