ASME B36.10M · chart

ASME B36.10M welded and seamless steel pipe chart — outer diameter and wall thickness

Welded and seamless wrought steel pipe. OD is fixed per size; the wall (schedule) is what you choose. This table covers 17 nominal sizes from NPS 1/8 to NPS 12. It gives the outside of the pipe and every wall we publish for it; the bore each wall leaves is on that size's own page.

Nominal sizes: 17
Published wall values: 128
Wall series: 13
OD range: 10.3–323.9 mm

Wall thickness in inches — millimetre version below
Nominal	DN	OD (in)	10	20	30	40	60	80	100	120	140	160	STD	XS	XXS
1/8	6	0.405	—	—	—	0.068	—	0.095	—	—	—	—	0.068	0.095	—
1/4	8	0.540	—	—	—	0.088	—	0.119	—	—	—	—	0.088	0.119	—
3/8	10	0.675	—	—	—	0.091	—	0.126	—	—	—	—	0.091	0.126	—
1/2	15	0.840	0.083	—	—	0.109	—	0.147	—	—	—	0.188	0.109	0.147	0.294
3/4	20	1.050	0.083	—	—	0.113	—	0.154	—	—	—	0.219	0.113	0.154	0.308
1	25	1.315	0.109	—	—	0.133	—	0.179	—	—	—	0.250	0.133	0.179	0.358
1 1/4	32	1.660	—	—	—	0.140	—	0.191	—	—	—	0.250	0.140	0.191	0.382
1 1/2	40	1.900	0.109	—	—	0.145	—	0.200	—	—	—	0.281	0.145	0.200	0.400
2	50	2.375	0.109	—	—	0.154	—	0.218	—	—	—	0.344	0.154	0.218	0.436
2 1/2	65	2.875	—	—	—	0.203	—	0.276	—	—	—	0.375	0.203	0.276	0.552
3	80	3.500	0.120	—	—	0.216	—	0.300	—	—	—	0.438	0.216	0.300	0.600
4	100	4.500	0.120	—	—	0.237	—	0.337	—	0.438	—	0.531	0.237	0.337	0.674
5	125	5.563	—	—	—	0.258	—	0.375	—	0.500	—	0.625	0.258	0.375	0.750
6	150	6.625	0.134	—	—	0.280	—	0.432	—	0.562	—	0.719	0.280	0.432	0.864
8	200	8.625	0.148	0.250	0.277	0.322	0.406	0.500	0.594	0.719	0.812	0.906	0.322	0.500	0.875
10	250	10.750	0.165	0.250	0.307	0.365	0.500	0.594	0.719	0.844	1.000	1.125	0.365	0.500	1.000
12	300	12.750	0.180	0.250	0.330	0.406	0.562	0.688	0.844	1.000	1.125	1.312	0.375	0.500	1.000

Wall thickness in millimetres (derived from the inch value × 25.4)
Nominal	DN	OD (mm)	10	20	30	40	60	80	100	120	140	160	STD	XS	XXS
1/8	6	10.287	—	—	—	1.727	—	2.413	—	—	—	—	1.727	2.413	—
1/4	8	13.716	—	—	—	2.235	—	3.023	—	—	—	—	2.235	3.023	—
3/8	10	17.145	—	—	—	2.311	—	3.200	—	—	—	—	2.311	3.200	—
1/2	15	21.336	2.108	—	—	2.769	—	3.734	—	—	—	4.775	2.769	3.734	7.468
3/4	20	26.670	2.108	—	—	2.870	—	3.912	—	—	—	5.563	2.870	3.912	7.823
1	25	33.401	2.769	—	—	3.378	—	4.547	—	—	—	6.350	3.378	4.547	9.093
1 1/4	32	42.164	—	—	—	3.556	—	4.851	—	—	—	6.350	3.556	4.851	9.703
1 1/2	40	48.260	2.769	—	—	3.683	—	5.080	—	—	—	7.137	3.683	5.080	10.160
2	50	60.325	2.769	—	—	3.912	—	5.537	—	—	—	8.738	3.912	5.537	11.074
2 1/2	65	73.025	—	—	—	5.156	—	7.010	—	—	—	9.525	5.156	7.010	14.021
3	80	88.900	3.048	—	—	5.486	—	7.620	—	—	—	11.125	5.486	7.620	15.240
4	100	114.300	3.048	—	—	6.020	—	8.560	—	11.125	—	13.487	6.020	8.560	17.120
5	125	141.300	—	—	—	6.553	—	9.525	—	12.700	—	15.875	6.553	9.525	19.050
6	150	168.275	3.404	—	—	7.112	—	10.973	—	14.275	—	18.263	7.112	10.973	21.946
8	200	219.075	3.759	6.350	7.036	8.179	10.312	12.700	15.088	18.263	20.625	23.012	8.179	12.700	22.225
10	250	273.050	4.191	6.350	7.798	9.271	12.700	15.088	18.263	21.438	25.400	28.575	9.271	12.700	25.400
12	300	323.850	4.572	6.350	8.382	10.312	14.275	17.475	21.438	25.400	28.575	33.325	9.525	12.700	25.400

Report a wrong value

How to read this table

OD is fixed per size. Changing the wall changes the bore, never the outside. A Sch 40 and a Sch 80 of the same nominal size fit the same fitting, clamp and hole.
Wall series here:Sch 10, Sch 20, Sch 30, Sch 40, Sch 60, Sch 80, Sch 100, Sch 120, Sch 140, Sch 160, STD, XS, XXS— a “—” cell means that combination is not published here, not that it does not exist. 3 further designation(s) (10, 30, 60) exist in the sources but did not reach two independent confirmations.
Millimetre columns are derived from the inch value × 25.4 — the standard is inch-native, so the inch column is the one to quote.

Size pages

Each size has its own page with the wall series side by side, bore in both units, DN and sources:

NPS 1/8 · NPS 1/4 · NPS 3/8 · NPS 1/2 · NPS 3/4 · NPS 1 · NPS 1 1/4 · NPS 1 1/2 · NPS 2 · NPS 2 1/2 · NPS 3 · NPS 4 · NPS 5 · NPS 6 · NPS 8 · NPS 10 · NPS 12

Same nominal, other materials

ASTM D2241 (PVC pressure pipe) · ASTM F876/F877 (CTS) (PEX tubing (CTS)) · ASME B36.19M (stainless steel pipe)

Edition not captured. The numbers are confirmed by two independent published sources, but we have not verified which printing of ASME B36.10M they came from, so no year is claimed here.How values are verified and what is still open.