EngiRef / Pipe Schedule

NPS 1/4 Schedule 40

NPS 1/4 Schedule 40 (DN 8): 13.7 mm outside diameter, 2.24 mm wall. Inside diameter 9.22 mm, internal area 66.8 mm². Mass 0.63 kg per metre.

Specification

Nominal pipe size (NPS)
1/4
Nominal diameter (DN)
8
Schedule
40
Outside diameter (mm)
13.7
Wall thickness (mm)
2.24
Inside diameter (mm)
9.22
Mass per metre (kg/m)
0.63
Internal area (mm²)
66.8

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