Module 3 Process Piping Hydraulics Sizing And Pressure Rating Pdf Page

[ t_m = \fracP \cdot D_o2(SE + PY) + A ] Where: ( t_m ) = minimum required thickness (mm or in) ( P ) = design pressure (gauge) ( D_o ) = outside diameter ( S ) = allowable stress from ASME B31.3 Table A-1 ( E ) = quality factor (1.0 for seamless, 0.85 for ERW) ( Y ) = temperature coefficient (0.4 for ferritic steel ≤ 480°C) ( A ) = mechanical/corrosion allowance (e.g., 1.5 – 3.0 mm)

, to determine the required thickness for straight pipe sections to withstand internal pressure. Pressure Rating Standards [ t_m = \fracP \cdot D_o2(SE + PY)

Where: