In piping, what does Schedule 40 primarily indicate?

In piping, what does Schedule 40 primarily indicate?

• A. Interior Diameter
• B. Wall Thickness
• C. Color Coding
• D. Pressure Rating

Answer: (B)

Schedule in piping refers to the wall thickness. That thickness is what gives the pipe its strength and determines how much pressure it can safely carry. For a given nominal size, Schedule 40 has a defined wall thickness; increasing the schedule thickens the wall, which increases the pressure rating but reduces the interior diameter. Color coding is just for identification, and while the schedule relates to pressure capacity, the primary thing Schedule 40 indicates is the wall thickness.

Schedule in piping refers to the wall thickness. That thickness is what gives the pipe its strength and determines how much pressure it can safely carry. For a given nominal size, Schedule 40 has a defined wall thickness; increasing the schedule thickens the wall, which increases the pressure rating but reduces the interior diameter. Color coding is just for identification, and while the schedule relates to pressure capacity, the primary thing Schedule 40 indicates is the wall thickness.