NPS 1-1/4 Sch 80 Steel Pipe, ASME B36.10
The NPS 1-1/4 Sch 80 steel pipe (ASME B36.10): outside diameter 42.164 mm, wall thickness 4.8514 mm, outside diameter, inches 1.66 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 1-1/4 Sch 80 pipe, NPS 1-1/4 Sch 80 x 304.8 pipes
- Model id:
asme-b36-10-nps1-1-4-sch80
- Standard: ASME B36.10:2022 · size NPS 1-1/4 Sch 80
Lengths
| Length (mm) | Part key | Simplified |
|---|
| 304.8 | asme-b36-10-nps1-1-4-sch80x304-8 | STEP |
Dimensions

| Symbol | Name | min | nom | max | Modeled | Rule | Level |
|---|
| D | Outside diameter | | 42.164 | | 42.164 | nominal | L1 |
| T | Wall thickness | | 4.8514 | | 4.8514 | nominal | L1 |
| D_in | Outside diameter, inches | | 1.66 | | 1.66 | nominal | L1 |
| T_in | Wall thickness, inches | | 0.191 | | 0.191 | nominal | L1 |
Drawing

As a PDF: CC-ASMEB36-10-SZ-nps1-1-4-sch80.pdf.
The NPS 1-1/4 Sch 80 steel pipe beside the NPS 1-1/4 Sch 40 and the NPS 1-1/2 Sch 40
The NPS 1-1/4 Sch 80 is number 14 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): 42.164 mm on the NPS 1-1/4 Sch 80 steel pipe, against 42.164 mm on the NPS 1-1/4 Sch 40 and 48.26 mm on the NPS 1-1/2 Sch 40.
- Wall thickness (T): 4.8514 mm on the NPS 1-1/4 Sch 80 steel pipe, against 3.556 mm on the NPS 1-1/4 Sch 40 and 3.683 mm on the NPS 1-1/2 Sch 40.
- Outside diameter, inches (D_in): 1.66 mm on the NPS 1-1/4 Sch 80 steel pipe, against 1.66 mm on the NPS 1-1/4 Sch 40 and 1.9 mm on the NPS 1-1/2 Sch 40.
- Wall thickness, inches (T_in): 0.191 mm on the NPS 1-1/4 Sch 80 steel pipe, against 0.14 mm on the NPS 1-1/4 Sch 40 and 0.145 mm on the NPS 1-1/2 Sch 40.
Other sizes
Documents
Sources
etb-b36-10, steeltube-b36-10. Full citations: the method page and this size's datasheet.
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