EngiRef / Pipe Schedule

NPS 3/4 Schedule 40

NPS 3/4 Schedule 40 (DN 20): 26.7 mm outside diameter, 2.87 mm wall. Inside diameter 20.96 mm, internal area 345 mm². Mass 1.69 kg per metre.

Specification

Nominal pipe size (NPS)
3/4
Nominal diameter (DN)
20
Schedule
40
Outside diameter (mm)
26.7
Wall thickness (mm)
2.87
Inside diameter (mm)
20.96
Mass per metre (kg/m)
1.69
Internal area (mm²)
345

Outside diameters follow ASME B36.10M; inside diameter is OD − 2 × wall thickness.