What does the term 'NPS' stand for in piping?

The term 'NPS' stands for Nominal Pipe Size. This designation is a standardized system used to describe the diameter of pipes, which is important for ensuring compatibility and interoperability in piping systems. The Nominal Pipe Size is a dimensionless number that approximates the inside diameter of the pipe in inches, making it easier to communicate about pipe sizes in a consistent manner across various applications and industries.

Using NPS allows for a standardized approach, enabling engineers, contractors, and fabricators to effectively plan and execute piping installations, ensuring that fittings and components match the designated nominal sizes. Understanding NPS is crucial for anyone working in plumbing, heating, or any pressure piping applications, as it helps to determine how pipes interact with each other and the systems they are part of.