Module 3 Process Piping Hydraulics Sizing And Pressure Rating Pdf _verified_ May 2026

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Glossary of Terms

• NPS: Nominal Pipe Size (e.g., NPS 4).
• ID: Internal Diameter.
• OD: Outside Diameter.
• Schedule: A standard for wall thickness.
• Head: Pressure expressed in terms of height of fluid column (meters or feet).
• Cavitation: Formation and collapse of vapor bubbles in a liquid stream.

P = 11.4 bar

• Carbon Steel: Typically 3mm (1/8 inch) is added to the calculated thickness for corrosion.
• Stainless Steel/Duplex: Often 0mm corrosion allowance due to high resistance, unless specific chemicals (e.g., chlorides) are present.