The outside diameter is measured to determine what aspect of a pipe?

The outside diameter is measured to determine what aspect of a pipe?

• A. Wall thickness
• B. Trade size
• C. Internal volume
• D. Length

Answer: (B)

Outside diameter is used to identify the pipe’s trade size. The industry wires this outer dimension into the nominal size so that pipes, fittings, flanges, and valves are designed to match. The wall thickness (and thus internal diameter and volume) comes from the pipe’s schedule, not from the outside diameter alone. Length is a separate measurement. So, measuring the outside diameter tells you the correct trade size to use when selecting fittings and components.

Outside diameter is used to identify the pipe’s trade size. The industry wires this outer dimension into the nominal size so that pipes, fittings, flanges, and valves are designed to match. The wall thickness (and thus internal diameter and volume) comes from the pipe’s schedule, not from the outside diameter alone. Length is a separate measurement. So, measuring the outside diameter tells you the correct trade size to use when selecting fittings and components.