Fluid Flow Table of Contents | Fluid Power Equipment
The following chart gives standard pipe schedule or pipes sizes as given by ANSI / ASME B36.10M and API 5L . Data given in based on the NPS Tables given by ANSI B36.10M and includes Pipe wall thickness, outside diameter, nominal diameter.
|ANSI - American National Standards Institute
ASME - American Society of Mechanical Engineers
API = American Petroleum Institute
NPS = Nominal Pipe Size
O.D. =. Outside Diameter
E.H. = Extra Heavy
Dbl. = Double
Std. = Standard
Pipe size is specified by two designations: a nominal pipe size (NPS) for diameter based on inches, and a schedule (Sched. or Sch.) for wall thickness. NPS is often incorrectly called National Pipe Size, due to confusion with national pipe thread (NPT).
The European (ISO) designation equivalent to NPS is DN (diamètre nominal/nominal diameter/Durchmesser nach Norm), in which sizes are measured in millimetres. The term NB (nominal bore) is also frequently used interchangeably with NPS
Standard Pipe Schedules (40, 80, 160, etc..) Related Resources --> Bottom of this webpage