NPS 1/4 Sch 40 Steel Pipe, ASME B36.10
The NPS 1/4 Sch 40 steel pipe (ASME B36.10): outside diameter 13.716 mm, wall thickness 2.2352 mm, outside diameter, inches 0.54 mm. Available as one length, 304.8 mm, as simplified STEP.

How these parts are made, and what the levels mean: read the method
- Also searched as: NPS 1/4 Sch 40 pipe, NPS 1/4 Sch 40 x 304.8 pipes
- Model id:
asme-b36-10-nps1-4-sch40
- Standard: ASME B36.10:2022 · size NPS 1/4 Sch 40
Lengths
| Length (mm) | Part key | Simplified |
|---|
| 304.8 | asme-b36-10-nps1-4-sch40x304-8 | STEP |
Dimensions

| Symbol | Name | min | nom | max | Modeled | Rule | Level |
|---|
| D | Outside diameter | | 13.716 | | 13.716 | nominal | L1 |
| T | Wall thickness | | 2.2352 | | 2.2352 | nominal | L1 |
| D_in | Outside diameter, inches | | 0.54 | | 0.54 | nominal | L1 |
| T_in | Wall thickness, inches | | 0.088 | | 0.088 | nominal | L1 |
Drawing

As a PDF: CC-ASMEB36-10-SZ-nps1-4-sch40.pdf.
The NPS 1/4 Sch 40 steel pipe beside the NPS 1/8 Sch 80 and the NPS 1/4 Sch 80
The NPS 1/4 Sch 40 is number 3 of the 18 ASME B36.10 steel pipes published here, listed from NPS 1/8 Sch 40 to NPS 2 Sch 80.
- Outside diameter (D): 13.716 mm on the NPS 1/4 Sch 40 steel pipe, against 10.287 mm on the NPS 1/8 Sch 80 and 13.716 mm on the NPS 1/4 Sch 80.
- Wall thickness (T): 2.2352 mm on the NPS 1/4 Sch 40 steel pipe, against 2.413 mm on the NPS 1/8 Sch 80 and 3.0226 mm on the NPS 1/4 Sch 80.
- Outside diameter, inches (D_in): 0.54 mm on the NPS 1/4 Sch 40 steel pipe, against 0.405 mm on the NPS 1/8 Sch 80 and 0.54 mm on the NPS 1/4 Sch 80.
- Wall thickness, inches (T_in): 0.088 mm on the NPS 1/4 Sch 40 steel pipe, against 0.095 mm on the NPS 1/8 Sch 80 and 0.119 mm on the NPS 1/4 Sch 80.
Other sizes
Documents
Sources
etb-b36-10, steeltube-b36-10. Full citations: the method page and this size's datasheet.
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