# Difference Between DN and NPS ⚙️📏 DN (Diameter Nominal) is a metric system (used mainly in Europe) that represents the nominal diameter in millimeters (e.g., DN100). NPS (Nominal Pipe Size) is an imperial system (used mainly in the USA) that represents the nominal diameter in inches (e.g., 2"). > ⚠️ Note: Both DN and NPS are nominal — they don't represent the exact internal or external diameter. --- 2. What is Pipe Schedule (SCH)? 📐🛠️ The Schedule defines the wall thickness of a pipe. The h
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# Difference Between DN and NPS ⚙️📏 DN (Diameter Nominal) is a m…
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