Schedule 40 pipe and PVC fittings, 1/2 to 2 inch — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/schedule-40-pipe/  (CC BY 4.0)
Basis: ASME B36.10 / ASTM D1785; nominal pipe size (NPS)
Catalog version: 2026-10-20

Sizes: see table below
- Nominal size is not the OD. Fittings grip the OD listed below; a printed adapter that slips over the pipe uses OD + 0.3 mm; one that goes inside a fitting socket uses the same OD − 0.2 mm.
- Wall thickness is Schedule 40 PVC; steel Sch 40 shares the OD.

nps  od_mm  od_in  wall_mm  id_mm
1/2  21.34  0.84  2.77  15.8
3/4  26.67  1.05  2.87  20.9
1  33.4  1.315  3.38  26.6
1-1/4  42.16  1.66  3.56  35.1
1-1/2  48.26  1.9  3.68  40.9
2  60.33  2.375  3.91  52.5

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- McMaster-Carr: Pipe fittings and pipe (free STEP/IGES/STL per part, for your own design use; no redistribution) — STEP, IGES, STL, PDF — McMaster-Carr site terms: personal design use, no redistribution [verify license at link] — https://www.mcmaster.com/products/pipe-fittings/
- Wikipedia: Nominal Pipe Size — web — CC BY-SA 4.0 (text) — https://en.wikipedia.org/wiki/Nominal_Pipe_Size

Free files (CC BY 4.0, Xem Studio; STEP + STL, 6 parts): https://xemstudio.com/files/hardware/schedule-40-pipe/index.json
API: https://xemstudio.com/api/geometry?object=schedule-40-pipe