Schedule 10 Pipe Dimensions

Wall thickness, bore and plain-end weight for all 30 sizes ASME B36.10M publishes in schedule 10, NPS 1/8 through NPS 36.

Schedule: Schedule 10
Sizes published: 30 (NPS 1/8 to NPS 36)
Thinnest wall: 0.049 in (1.2 mm) at NPS 1/8
Thickest wall: 0.312 in (7.9 mm) at NPS 26
Standard: ASME B36.10M

Dimensions are given in inches, with the millimetre equivalent beneath in grey.

ASME B36.10M schedule 10 dimensions.
Size	DN	Outside diameter	Wall thickness	Inside diameter	Weight, empty	Water (US gal/ft)	This size
NPS 1/8	DN 6	0.40510.29 mm	0.0491.24 mm	0.3077.80 mm	0.190.28 kg/m	0.004	detail →
NPS 1/4	DN 8	0.54013.72 mm	0.0651.65 mm	0.41010.41 mm	0.330.49 kg/m	0.007	detail →
NPS 3/8	DN 10	0.67517.14 mm	0.0651.65 mm	0.54513.84 mm	0.420.63 kg/m	0.012	detail →
NPS 1/2	DN 15	0.84021.34 mm	0.0832.11 mm	0.67417.12 mm	0.671.00 kg/m	0.019	detail →
NPS 3/4	DN 20	1.05026.67 mm	0.0832.11 mm	0.88422.45 mm	0.861.28 kg/m	0.032	detail →
NPS 1	DN 25	1.31533.40 mm	0.1092.77 mm	1.09727.86 mm	1.402.09 kg/m	0.049	detail →
NPS 1 1/4	DN 32	1.66042.16 mm	0.1092.77 mm	1.44236.63 mm	1.812.69 kg/m	0.085	detail →
NPS 1 1/2	DN 40	1.90048.26 mm	0.1092.77 mm	1.68242.72 mm	2.083.10 kg/m	0.115	detail →
NPS 2	DN 50	2.37560.32 mm	0.1092.77 mm	2.15754.79 mm	2.643.93 kg/m	0.190	detail →
NPS 2 1/2	DN 65	2.87573.02 mm	0.1203.05 mm	2.63566.93 mm	3.535.25 kg/m	0.283	detail →
NPS 3	DN 80	3.50088.90 mm	0.1203.05 mm	3.26082.80 mm	4.336.45 kg/m	0.434	detail →
NPS 3 1/2	DN 90	4.000101.60 mm	0.1203.05 mm	3.76095.50 mm	4.977.40 kg/m	0.577	detail →
NPS 4	DN 100	4.500114.30 mm	0.1203.05 mm	4.260108.20 mm	5.618.35 kg/m	0.740	detail →
NPS 5	DN 125	5.563141.30 mm	0.1343.40 mm	5.295134.49 mm	7.7711.56 kg/m	1.144	detail →
NPS 6	DN 150	6.625168.27 mm	0.1343.40 mm	6.357161.47 mm	9.2913.82 kg/m	1.649	detail →
NPS 8	DN 200	8.625219.07 mm	0.1483.76 mm	8.329211.56 mm	13.4019.94 kg/m	2.830	detail →
NPS 10	DN 250	10.750273.05 mm	0.1654.19 mm	10.420264.67 mm	18.6527.76 kg/m	4.430	detail →
NPS 12	DN 300	12.750323.85 mm	0.1804.57 mm	12.390314.71 mm	24.1735.96 kg/m	6.263	detail →
NPS 14	DN 350	14.000355.60 mm	0.1884.78 mm	13.624346.05 mm	27.7341.27 kg/m	7.573	detail →
NPS 16	DN 400	16.000406.40 mm	0.1884.78 mm	15.624396.85 mm	31.7547.25 kg/m	9.960	detail →
NPS 18	DN 450	18.000457.20 mm	0.1884.78 mm	17.624447.65 mm	35.7653.22 kg/m	12.673	detail →
NPS 20	DN 500	20.000508.00 mm	0.2185.54 mm	19.564496.93 mm	46.0668.54 kg/m	15.616	detail →
NPS 22	DN 550	22.000558.80 mm	0.2185.54 mm	21.564547.73 mm	50.7175.47 kg/m	18.972	detail →
NPS 24	DN 600	24.000609.60 mm	0.2506.35 mm	23.500596.90 mm	63.4194.37 kg/m	22.532	detail →
NPS 26	DN 650	26.000660.40 mm	0.3127.92 mm	25.376644.55 mm	85.60127.38 kg/m	26.273	detail →
NPS 28	DN 700	28.000711.20 mm	0.3127.92 mm	27.376695.35 mm	92.26137.30 kg/m	30.577	detail →
NPS 30	DN 750	30.000762.00 mm	0.3127.92 mm	29.376746.15 mm	98.93147.22 kg/m	35.208	detail →
NPS 32	DN 800	32.000812.80 mm	0.3127.92 mm	31.376796.95 mm	105.59157.14 kg/m	40.166	detail →
NPS 34	DN 850	34.000863.60 mm	0.3127.92 mm	33.376847.75 mm	112.26167.05 kg/m	45.449	detail →
NPS 36	DN 900	36.000914.40 mm	0.3127.92 mm	35.376898.55 mm	118.92176.97 kg/m	51.060	detail →

Weight is plain-end carbon steel, w = 10.6802 × t × (OD − t) lb/ft.

Common questions

What sizes is schedule 10 pipe made in?

ASME B36.10M publishes schedule 10 in 30 sizes, from NPS 1/8 through NPS 36. Wall thickness runs from 0.049 in (1.2 mm) at the small end to 0.312 in (7.9 mm) at the large end.

Does schedule 10 mean the same wall thickness in every size?

No. A schedule number is a series, not a thickness. It sets a wall that rises with the pipe size so the pressure rating stays roughly constant across the range — which is the whole point of the schedule system.

How pipe schedules work →