Pipe Schedule and Pressure Calculator
Look up steel pipe from NPS ½ to 24 by schedule, with its inside diameter, mass and flow area. Then estimate the pressure the pipe can take with the wall thickness equation of ASME B31.3, and the flow velocity for your flow rate.
Results
Allowable pressure:
- Outside diameter
- Wall thickness
- Inside diameter
- Wall left after tolerance and corrosion
- Mass, empty
- Mass, full of water
- Flow area
- Volume inside
- Flow velocity
P = 2 S E t / (D − 2 Y t), where t is the wall after the mill tolerance and corrosion allowance, D is the outside diameter and Y = 0.4.
This is the straight-pipe pressure equation only. It does not cover bends, branches, flanges, valves, external loads or the hydrotest. A piping design has to be checked to the code that applies to it.
Every schedule for this size
| Schedule | Wall, mm | Wall, in | Inside diameter, mm | Mass, kg/m | Allowable pressure, bar |
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