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What Is Pipe Schedule?

Pipe schedule refers to a standardized form of measurement for the sizes of certain types of pipes. It is used for measuring types of pipe that are usually used in industrial applications.

Pipe schedule is a way of measuring the size of a pipe's walls.

Pipe schedule refers to a standardized form of measurement for the sizes of certain types of pipes.  It is used for measuring types of pipe that are usually used in industrial applications.


Schedule number

The schedule numbers are assigned to fixed outer and inner diameters for pipes.  A schedule number, therefore, demonstrates the thickness of a pipe's walls, instead of other dimensions related to the pipe.


Schedule importance

Pipes are used to transport fluids, so an important measurement is their thickness, which demonstrates their capability to carry fluids of certain volumes and pressures, depending on the material of the pipe. 


Pressure and schedule

Pipe schedule formerly was used to demonstrate the pressure capacity of a particular pipe, but it no longer has that function because the schedule number is strictly about the dimensions of a pipe and does not take into consideration the material from which it is made.  A pipe's pressure capabilities differ with different materials.

About the Author

Tom Gresham is a freelance writer and public relations specialist who has been writing professionally since 1999. His articles have appeared in "The Washington Post," "Virginia Magazine," "Vermont Magazine," "Adirondack Life" and the "Southern Arts Journal," among other publications. He graduated from the University of Virginia.

Photo Credits

  • pipe fitting image by Joann Cooper from Fotolia.com
  • pipe fitting image by Joann Cooper from Fotolia.com