# Stainless steel pipe ASME B36.19M: OD and wall thickness for Sch 5S, 10S, 40S, 80S, NPS 1/8 to 12 (+ 14 to 18 in 5S / 10S) + hollow pipe STEP/STL

> What are the OD and wall thickness of stainless steel pipe in Schedule 5S, 10S, 40S and 80S (ASME B36.19M) for each NPS?

- Category: Tri-clamp & pipe › Pipe, tube & threads
- Kind: Standard part
- Basis: Wall thickness from the Engineering ToolBox stainless table (B36.19), mm cross-checked against Project Materials' mm table; NPS 14 to 18 from two sources; the standard is paywalled and was not read
- Page: https://xemstudio.com/objects/stainless-steel-pipe-asme-b36-19m-sch-5s-10s-40s-80s/ · JSON: https://xemstudio.com/api/geometry?object=stainless-steel-pipe-asme-b36-19m-sch-5s-10s-40s-80s · Plain text: https://xemstudio.com/objects/stainless-steel-pipe-asme-b36-19m-sch-5s-10s-40s-80s/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); files CC BY 4.0 or their publisher's license
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**Exact dimensions.** Every file is drawn at true size with no tolerance added. The holes and pins that meet another part are listed below under Mating features, with the fit each joint needs; open those by your process's clearance before making the part.

## Notes

- ASME B36.19M is the stainless steel pipe standard: same OD per NPS as carbon pipe (ASME B36.10M), thinner walls in the S schedules (5S, 10S, 40S, 80S) because stainless is chosen for corrosion, not pressure. The OD is fixed per NPS in inches; the mm column is the inch value x 25.4 to 0.01 mm. The walls are in inches in the standard; the mm in the cells is the inch value x 25.4 rounded half up.
- Numbers: the inch walls are from the Engineering ToolBox stainless table (NPS 1/8 to 12, all four schedules). Every wall was matched against Project Materials' mm B36.19 table (the same 18 sizes, all 70 cells) and the 40S and 80S walls equal the carbon STD and XS walls of the B36.10M page for every size. For 5S and 10S on NPS 14, 16 and 18 (0.156 / 0.188, 0.165 / 0.188, 0.165 / 0.188 in) two sources agree: the Engineering ToolBox table hosted by the US NRC and the Misumi pipe-schedule chart (Wermac's NPS 14 page also shows the 0.156 and 0.188 walls). The same sources print no 40S or 80S wall above NPS 12, so those cells are dashes. NPS 20 and up (5S, 10S exist there) are not shown because only one source (a Misumi table with misaligned rows) printed them.
- Rounding: NPS 1/8 10S is 0.049 in = 1.24 mm here and in Project Materials; the Engineering ToolBox stainless table prints 1.25. NPS 10 and 5: 5S / 10S are 3.40 / 4.19 mm (Engineering ToolBox: 3.41 / 4.20). The inch values agree everywhere, so the mm column is derived from them. 5S does not exist for NPS 1/8, 1/4 and 3/8 in the sources.
- 10S is not the same as carbon Sch 10 above NPS 12: carbon Sch 10 is 0.250 in on NPS 14 to 24 while 10S is 0.188 in on NPS 14 to 18. Up to NPS 12 the two have the same wall. Tri-clamp / sanitary tube (ASME BPE, OD in inches with 0.065 in wall) is a different product: see the tri-clamp pages.
- Files: 13 plain hollow tubes, 100 mm long: NPS 2 in all four schedules, NPS 4 in all four, NPS 2-1/2, 3 and 6 in 10S / 40S as listed. OD and wall are the table values; the length is an example. No bevel, seam, polish or tolerance (B36.19M allows welded pipe -12.5% on wall).
- Left out: NPS 20 and up, 40S / 80S above NPS 12 (none printed), weights, tolerances; the standard itself (ASME B36.19M) is paywalled and was not read.

## Mating features (exact size; open press / slide / run / socket by your process clearance, leave designed and clamp as drawn)

| feature | exact | mates with | fit | files |
|---|---|---|---|---|
| outside diameter | Ø OD per NPS, same as carbon pipe (NPS 2 Ø60.33, NPS 4 Ø114.30) | stainless butt-weld fittings, flanges and tri-clamp ferrules cut for the same NPS | designed | stainless-pipe-* |
| bore (OD minus two walls) | 10S NPS 2 Ø54.79 / NPS 4 Ø108.20; 40S NPS 2 Ø52.50 / NPS 4 Ø101.60 | flow passage; inserts take the bore plus your clearance | slide | stainless-pipe-* |

## Sizes

| NPS | OD, in | OD, mm | Sch 5S, wall mm (in) | Sch 10S, wall mm (in) | Sch 40S, wall mm (in) | Sch 80S, wall mm (in) |
|---|---|---|---|---|---|---|
| 1/8 | 0.405 | 10.29 | — | 1.24 (0.049) | 1.73 (0.068) | 2.41 (0.095) |
| 1/4 | 0.540 | 13.72 | — | 1.65 (0.065) | 2.24 (0.088) | 3.02 (0.119) |
| 3/8 | 0.675 | 17.14 | — | 1.65 (0.065) | 2.31 (0.091) | 3.20 (0.126) |
| 1/2 | 0.840 | 21.34 | 1.65 (0.065) | 2.11 (0.083) | 2.77 (0.109) | 3.73 (0.147) |
| 3/4 | 1.050 | 26.67 | 1.65 (0.065) | 2.11 (0.083) | 2.87 (0.113) | 3.91 (0.154) |
| 1 | 1.315 | 33.40 | 1.65 (0.065) | 2.77 (0.109) | 3.38 (0.133) | 4.55 (0.179) |
| 1-1/4 | 1.660 | 42.16 | 1.65 (0.065) | 2.77 (0.109) | 3.56 (0.140) | 4.85 (0.191) |
| 1-1/2 | 1.900 | 48.26 | 1.65 (0.065) | 2.77 (0.109) | 3.68 (0.145) | 5.08 (0.200) |
| 2 | 2.375 | 60.32 | 1.65 (0.065) | 2.77 (0.109) | 3.91 (0.154) | 5.54 (0.218) |
| 2-1/2 | 2.875 | 73.02 | 2.11 (0.083) | 3.05 (0.120) | 5.16 (0.203) | 7.01 (0.276) |
| 3 | 3.500 | 88.90 | 2.11 (0.083) | 3.05 (0.120) | 5.49 (0.216) | 7.62 (0.300) |
| 3-1/2 | 4.000 | 101.60 | 2.11 (0.083) | 3.05 (0.120) | 5.74 (0.226) | 8.08 (0.318) |
| 4 | 4.500 | 114.30 | 2.11 (0.083) | 3.05 (0.120) | 6.02 (0.237) | 8.56 (0.337) |
| 5 | 5.563 | 141.30 | 2.77 (0.109) | 3.40 (0.134) | 6.55 (0.258) | 9.53 (0.375) |
| 6 | 6.625 | 168.28 | 2.77 (0.109) | 3.40 (0.134) | 7.11 (0.280) | 10.97 (0.432) |
| 8 | 8.625 | 219.08 | 2.77 (0.109) | 3.76 (0.148) | 8.18 (0.322) | 12.70 (0.500) |
| 10 | 10.750 | 273.05 | 3.40 (0.134) | 4.19 (0.165) | 9.27 (0.365) | 12.70 (0.500) |
| 12 | 12.750 | 323.85 | 3.96 (0.156) | 4.57 (0.180) | 9.53 (0.375) | 12.70 (0.500) |
| 14 | 14.000 | 355.60 | 3.96 (0.156) | 4.78 (0.188) | — | — |
| 16 | 16.000 | 406.40 | 4.19 (0.165) | 4.78 (0.188) | — | — |
| 18 | 18.000 | 457.20 | 4.19 (0.165) | 4.78 (0.188) | — | — |

## Where the files are

- The Engineering ToolBox: [Stainless steel pipes, dimensions and weights (ANSI B36.19: 5S, 10S, 40S, 80S, with inch and mm walls)](https://www.engineeringtoolbox.com/ansi-stainless-steel-pipes-d_247.html) — web — Publisher's page; dimensions are facts
- Project Materials (blog): [ASME B36.10 and B36.19 pipe wall thickness charts in mm, NPS 1/8 to 48 (mm values used as a cross-check; its NPS 4 to 6 columns for Sch 140 / 160 / XXS are shifted and not used)](https://blog.projectmaterials.com/pipes/pipe-dimensions-asme-36-10-19/) — web — Publisher's page; dimensions are facts
- The Engineering ToolBox (copy hosted by the US NRC): [Carbon, alloy and stainless steel pipes, ASME/ANSI B36.10 / B36.19, NPS 1/8 to 18 (used as a cross-check)](https://www.nrc.gov/docs/ML1209/ML12090A666.pdf) — web — Publisher's page; dimensions are facts
- MISUMI USA (blog): [Standard pipe schedule charts (inches; its Sch 10 column for NPS 1/8 to 12 agrees with 10S; some rows are misaligned and are not used)](https://us.misumi-ec.com/blog/standard-pipe-schedule-charts/) — web — Publisher's page; dimensions are facts
- Wermac: [ASME B36.10 / B36.19 wall thicknesses, NPS 12 and 14 (inch and mm, every wall a size is made in)](https://www.wermac.org/pipes/dim_b36.10_pipes_part-d.html) — web — Publisher's page; dimensions are facts
- Tubing China: [ANSI standard steel pipe chart, ASME B36.10 / B36.19 (inch wall, ID and weight per size and schedule; sample rows used as a cross-check)](https://tubingchina.com/ansi-standard-pipe-chart-schdule.htm) — web — Publisher's page; dimensions are facts

## Free STEP/STL (13 parts, CC BY 4.0, Xem Studio)

Index: https://xemstudio.com/files/hardware/stainless-steel-pipe-asme-b36-19m-sch-5s-10s-40s-80s/index.json

- stainless-pipe-nps-2-sch-5s-100mm: [STEP](https://xemstudio.com/files/hardware/stainless-steel-pipe-asme-b36-19m-sch-5s-10s-40s-80s/stainless-pipe-nps-2-sch-5s-100mm.step) · [STL](https://xemstudio.com/files/hardware/stainless-steel-pipe-asme-b36-19m-sch-5s-10s-40s-80s/stainless-pipe-nps-2-sch-5s-100mm.stl) — ASME B36.19M stainless pipe NPS 2 Sch 5S: OD 60.32 mm (2.375 in), wall 1.65 mm (0.065 in), bore 57.02 mm, a plain hollow tube; the 100 mm length is an example; no end bevel, no weld seam, no tolerance
- stainless-pipe-nps-2-sch-10s-100mm: [STEP](https://xemstudio.com/files/hardware/stainless-steel-pipe-asme-b36-19m-sch-5s-10s-40s-80s/stainless-pipe-nps-2-sch-10s-100mm.step) · [STL](https://xemstudio.com/files/hardware/stainless-steel-pipe-asme-b36-19m-sch-5s-10s-40s-80s/stainless-pipe-nps-2-sch-10s-100mm.stl) — ASME B36.19M stainless pipe NPS 2 Sch 10S: OD 60.32 mm (2.375 in), wall 2.77 mm (0.109 in), bore 54.78 mm, a plain hollow tube; the 100 mm length is an example; no end bevel, no weld seam, no tolerance
- stainless-pipe-nps-2-sch-40s-100mm: [STEP](https://xemstudio.com/files/hardware/stainless-steel-pipe-asme-b36-19m-sch-5s-10s-40s-80s/stainless-pipe-nps-2-sch-40s-100mm.step) · [STL](https://xemstudio.com/files/hardware/stainless-steel-pipe-asme-b36-19m-sch-5s-10s-40s-80s/stainless-pipe-nps-2-sch-40s-100mm.stl) — ASME B36.19M stainless pipe NPS 2 Sch 40S: OD 60.32 mm (2.375 in), wall 3.91 mm (0.154 in), bore 52.50 mm, a plain hollow tube; the 100 mm length is an example; no end bevel, no weld seam, no tolerance
- stainless-pipe-nps-2-sch-80s-100mm: [STEP](https://xemstudio.com/files/hardware/stainless-steel-pipe-asme-b36-19m-sch-5s-10s-40s-80s/stainless-pipe-nps-2-sch-80s-100mm.step) · [STL](https://xemstudio.com/files/hardware/stainless-steel-pipe-asme-b36-19m-sch-5s-10s-40s-80s/stainless-pipe-nps-2-sch-80s-100mm.stl) — ASME B36.19M stainless pipe NPS 2 Sch 80S: OD 60.32 mm (2.375 in), wall 5.54 mm (0.218 in), bore 49.24 mm, a plain hollow tube; the 100 mm length is an example; no end bevel, no weld seam, no tolerance
- stainless-pipe-nps-2-1-2-sch-10s-100mm: [STEP](https://xemstudio.com/files/hardware/stainless-steel-pipe-asme-b36-19m-sch-5s-10s-40s-80s/stainless-pipe-nps-2-1-2-sch-10s-100mm.step) · [STL](https://xemstudio.com/files/hardware/stainless-steel-pipe-asme-b36-19m-sch-5s-10s-40s-80s/stainless-pipe-nps-2-1-2-sch-10s-100mm.stl) — ASME B36.19M stainless pipe NPS 2-1/2 Sch 10S: OD 73.02 mm (2.875 in), wall 3.05 mm (0.120 in), bore 66.92 mm, a plain hollow tube; the 100 mm length is an example; no end bevel, no weld seam, no tolerance
- stainless-pipe-nps-3-sch-10s-100mm: [STEP](https://xemstudio.com/files/hardware/stainless-steel-pipe-asme-b36-19m-sch-5s-10s-40s-80s/stainless-pipe-nps-3-sch-10s-100mm.step) · [STL](https://xemstudio.com/files/hardware/stainless-steel-pipe-asme-b36-19m-sch-5s-10s-40s-80s/stainless-pipe-nps-3-sch-10s-100mm.stl) — ASME B36.19M stainless pipe NPS 3 Sch 10S: OD 88.90 mm (3.500 in), wall 3.05 mm (0.120 in), bore 82.80 mm, a plain hollow tube; the 100 mm length is an example; no end bevel, no weld seam, no tolerance
- stainless-pipe-nps-3-sch-40s-100mm: [STEP](https://xemstudio.com/files/hardware/stainless-steel-pipe-asme-b36-19m-sch-5s-10s-40s-80s/stainless-pipe-nps-3-sch-40s-100mm.step) · [STL](https://xemstudio.com/files/hardware/stainless-steel-pipe-asme-b36-19m-sch-5s-10s-40s-80s/stainless-pipe-nps-3-sch-40s-100mm.stl) — ASME B36.19M stainless pipe NPS 3 Sch 40S: OD 88.90 mm (3.500 in), wall 5.49 mm (0.216 in), bore 77.92 mm, a plain hollow tube; the 100 mm length is an example; no end bevel, no weld seam, no tolerance
- stainless-pipe-nps-4-sch-5s-100mm: [STEP](https://xemstudio.com/files/hardware/stainless-steel-pipe-asme-b36-19m-sch-5s-10s-40s-80s/stainless-pipe-nps-4-sch-5s-100mm.step) · [STL](https://xemstudio.com/files/hardware/stainless-steel-pipe-asme-b36-19m-sch-5s-10s-40s-80s/stainless-pipe-nps-4-sch-5s-100mm.stl) — ASME B36.19M stainless pipe NPS 4 Sch 5S: OD 114.30 mm (4.500 in), wall 2.11 mm (0.083 in), bore 110.08 mm, a plain hollow tube; the 100 mm length is an example; no end bevel, no weld seam, no tolerance
- stainless-pipe-nps-4-sch-10s-100mm: [STEP](https://xemstudio.com/files/hardware/stainless-steel-pipe-asme-b36-19m-sch-5s-10s-40s-80s/stainless-pipe-nps-4-sch-10s-100mm.step) · [STL](https://xemstudio.com/files/hardware/stainless-steel-pipe-asme-b36-19m-sch-5s-10s-40s-80s/stainless-pipe-nps-4-sch-10s-100mm.stl) — ASME B36.19M stainless pipe NPS 4 Sch 10S: OD 114.30 mm (4.500 in), wall 3.05 mm (0.120 in), bore 108.20 mm, a plain hollow tube; the 100 mm length is an example; no end bevel, no weld seam, no tolerance
- stainless-pipe-nps-4-sch-40s-100mm: [STEP](https://xemstudio.com/files/hardware/stainless-steel-pipe-asme-b36-19m-sch-5s-10s-40s-80s/stainless-pipe-nps-4-sch-40s-100mm.step) · [STL](https://xemstudio.com/files/hardware/stainless-steel-pipe-asme-b36-19m-sch-5s-10s-40s-80s/stainless-pipe-nps-4-sch-40s-100mm.stl) — ASME B36.19M stainless pipe NPS 4 Sch 40S: OD 114.30 mm (4.500 in), wall 6.02 mm (0.237 in), bore 102.26 mm, a plain hollow tube; the 100 mm length is an example; no end bevel, no weld seam, no tolerance
- stainless-pipe-nps-4-sch-80s-100mm: [STEP](https://xemstudio.com/files/hardware/stainless-steel-pipe-asme-b36-19m-sch-5s-10s-40s-80s/stainless-pipe-nps-4-sch-80s-100mm.step) · [STL](https://xemstudio.com/files/hardware/stainless-steel-pipe-asme-b36-19m-sch-5s-10s-40s-80s/stainless-pipe-nps-4-sch-80s-100mm.stl) — ASME B36.19M stainless pipe NPS 4 Sch 80S: OD 114.30 mm (4.500 in), wall 8.56 mm (0.337 in), bore 97.18 mm, a plain hollow tube; the 100 mm length is an example; no end bevel, no weld seam, no tolerance
- stainless-pipe-nps-6-sch-10s-100mm: [STEP](https://xemstudio.com/files/hardware/stainless-steel-pipe-asme-b36-19m-sch-5s-10s-40s-80s/stainless-pipe-nps-6-sch-10s-100mm.step) · [STL](https://xemstudio.com/files/hardware/stainless-steel-pipe-asme-b36-19m-sch-5s-10s-40s-80s/stainless-pipe-nps-6-sch-10s-100mm.stl) — ASME B36.19M stainless pipe NPS 6 Sch 10S: OD 168.27 mm (6.625 in), wall 3.40 mm (0.134 in), bore 161.47 mm, a plain hollow tube; the 100 mm length is an example; no end bevel, no weld seam, no tolerance
- stainless-pipe-nps-6-sch-40s-100mm: [STEP](https://xemstudio.com/files/hardware/stainless-steel-pipe-asme-b36-19m-sch-5s-10s-40s-80s/stainless-pipe-nps-6-sch-40s-100mm.step) · [STL](https://xemstudio.com/files/hardware/stainless-steel-pipe-asme-b36-19m-sch-5s-10s-40s-80s/stainless-pipe-nps-6-sch-40s-100mm.stl) — ASME B36.19M stainless pipe NPS 6 Sch 40S: OD 168.27 mm (6.625 in), wall 7.11 mm (0.280 in), bore 154.05 mm, a plain hollow tube; the 100 mm length is an example; no end bevel, no weld seam, no tolerance

## Questions

**What is the wall of 2 inch Sch 10S stainless pipe?**

NPS 2: OD 2.375 in (60.33 mm), 10S wall 0.109 in (2.77 mm), bore 54.79 mm.

**What is the difference between Sch 10 and Sch 10S?**

Up to NPS 12 none: same wall. From NPS 14, carbon Sch 10 is 0.250 in and stainless 10S is 0.188 in.

**Is Sch 40S the same as Sch 40?**

Up to NPS 10, yes (same wall as carbon STD / Sch 40). The S schedules above NPS 12 are thin-wall only (5S and 10S).

**Why are there no 5S walls for small sizes?**

None of the tables read print 5S below NPS 1/2.

**Are the CAD files exact?**

They are plain hollow tubes at the table OD and wall, 100 mm long (an example length); real pipe has mill tolerance.

## Fits with

- [Steel pipe ASME B36.10M: OD and wall thickness by NPS and schedule (Sch 10, 40, STD, 80, XS, 160, XXS), NPS 1/8 to 24 + hollow pipe STEP/STL](https://xemstudio.com/objects/steel-pipe-asme-b36-10m-nps-1-8-to-24/)
- [Schedule 40 pipe and PVC fittings, 1/2 to 2 inch](https://xemstudio.com/objects/schedule-40-pipe/)
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- [ASME B16.5 Class 150 pipe flanges, NPS ½ to 24: dimensions, bolt circle, slip-on and blind](https://xemstudio.com/objects/asme-b16-5-class-150-flanges/)
- [Forged threaded fittings (ASME B16.11), Class 2000 / 3000 / 6000: elbows, tees, caps — centre-to-end, band OD, thread length](https://xemstudio.com/objects/forged-threaded-fittings-b16-11/)
- [Round HSS tube (AISC): HSS 4.500x0.237, HSS 6.625x0.280, HSS 10.000x0.375 dimensions + STEP/STL](https://xemstudio.com/objects/aisc-hss-round/)