Nominal Pipe Size (NPS) of a pipe less than 12 inches in diameter indicates its________________?
Correct answer: D. Neither inner nor outer diameter
- A. Inner diameter
- B. Outer diameter
- C. Thickness
- D. Neither inner nor outer diameter
Explanation
For NPS values below 12 inches, the nominal pipe size is neither the exact inner diameter nor the exact outer diameter. It is a standard nominal designation, while actual dimensions depend on the pipe schedule.
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