Steel Pipes Dimensions

Reference data and engineering information about steel pipes dimensions for piping systems applications.

steelpipesdimensions

Overview

Steel pipe dimensions are standardized by ASME/ANSI B36.10 (welded and seamless wrought steel) and ASME/ANSI B36.19 (stainless steel). Regardless of schedule number, all pipes of a given nominal size share the same outside diameter. As the schedule number increases, wall thickness increases and the internal bore decreases.

Three traditional weight designations are used:

STD (Standard) — the baseline wall thickness for a given size
XS (Extra Strong) — heavier wall, sometimes called XH (Extra Heavy)
XXS (Double Extra Strong) — the heaviest wall, sometimes called XXH

Key Formulas

Cross-Sectional Area

$A = \frac{\pi}{4}\left(D_o^2 - D_i^2\right)$

Inside Diameter from Wall Thickness

$D_i = D_o - 2t$

Weight per Unit Length

$W = \rho_{steel} \cdot A_{metal}$

where steel density is approximately 490 lb/ft³ (7850 kg/m³).

Variables

Symbol	Description	Unit
$D_o$	Outside diameter	in
$D_i$	Inside diameter	in
$t$	Wall thickness	in
$A$	Cross-sectional area	in²
$W$	Weight per foot	lb/ft

Pipe Dimensions — Common Schedules

20 rows

Steel Pipe Dimensions — STD and XS Schedules (ASME/ANSI B36.10/19)
Nominal Size(in)	Outside Dia.(in)	Schedule(-)	Wall (t)(in)	Bore (d)(in)
1/8	0.405	40S (STD)	0.049	0.307
1/8	0.405	80S (XS)	0.068	0.269
1/4	0.54	40S (STD)	0.065	0.41
1/4	0.54	80S (XS)	0.088	0.364
1/2	0.84	40S (STD)	0.109	0.622
1/2	0.84	80S (XS)	0.147	0.546
3/4	1.05	40S (STD)	0.113	0.824
3/4	1.05	80S (XS)	0.154	0.742
1	1.315	40S (STD)	0.133	1.049
1	1.315	80S (XS)	0.179	0.957
1 1/2	1.9	40S (STD)	0.145	1.61
1 1/2	1.9	80S (XS)	0.2	1.5
2	2.375	40S (STD)	0.154	2.067
2	2.375	80S (XS)	0.218	1.939
3	3.5	40S (STD)	0.216	3.068
3	3.5	80S (XS)	0.3	2.9
4	4.5	40S (STD)	0.237	4.026
4	4.5	80S (XS)	0.337	3.826
6	6.625	40S (STD)	0.28	6.065
6	6.625	80S (XS)	0.432	5.761

Source: ASME/ANSI B36.10/19

Pipe Weight and Internal Properties

16 rows

Weight and Internal Area — STD and XS Schedules
Nominal Size(in)	Schedule(-)	Metal Area(in²)	Pipe Weight(lb/ft)	Water Weight(lb/ft)
1/2	40S (STD)	0.25	0.85	0.132
1/2	80S (XS)	0.32	1.09	0.102
3/4	40S (STD)	0.333	1.13	0.231
3/4	80S (XS)	0.434	1.47	0.188
1	40S (STD)	0.494	1.68	0.375
1	80S (XS)	0.639	2.17	0.312
1 1/2	40S (STD)	0.8	2.72	0.882
1 1/2	80S (XS)	1.068	3.63	0.765
2	40S (STD)	1.075	3.65	1.45
2	80S (XS)	1.477	5.02	1.28
3	40S (STD)	2.228	7.58	3.2
3	80S (XS)	3.016	10.25	2.6
4	40S (STD)	3.174	10.79	5.5
4	80S (XS)	4.407	14.98	4.98
6	40S (STD)	5.581	18.97	12.51
6	80S (XS)	8.405	28.57	11.29

Source: ASME/ANSI B36.10/19

Bore Comparison by Schedule

Inside Diameter: STD vs XS Schedule

Calculator — Pipe Cross-Sectional Area

Pipe Area Calculator

Outside Diameter(in)

Wall Thickness(in)

Unit Converter

Steel Pipe Dimension Unit Converter

Length(in)

Weight per length(lb/ft)

Area(in²)

Area moment(in⁴)

Original Source Images

steel pipes

Restored Original Source Tables

The following tables are restored from the original source page to preserve the complete reference data.

The original HTML tables use multiple header rows. The dimensions table has 24 HTML rows made up of 3 header rows and 21 pipe-size data rows; the properties table has 23 HTML rows made up of 2 header rows and 21 pipe-size data rows. The restored tables below preserve all data rows from the original source tables.

ASME/ANSI B36.10/19 - Carbon, Alloy and Stainless Steel Pipes - Dimensions

21 rows

ASME/ANSI B36.10/19 - Carbon, Alloy and Stainless Steel Pipes - Dimensions
Iron Pipe Size	Schedule No.	Identification	Identification	Identification	Wall Thickness - t -(inches)	Inside Diameter - d - (inches)
1/8	0.405	. STD XS	. 40 80	10S 40S 80S	0.049 0.068 0.095	0.307 0.269 0.215
1/4	0.54	. STD XS	. 40 80	10S 40S 80S	0.065 0.088 0.119	0.410 0.364 0.302
3/8	0.675	. STD XS	. 40 80	10S 40S 80S	0.065 0.091 0.126	0.545 0.493 0.423
1/2	0.84	.. STD XS. XXS	.. 40 80 160.	5S 10S 40S 80S..	0.065 0.083 0.109 0.147 0.187 0.294	0.710 0.674 0.622 0.546 0.466 0.252
3/4	1.05	.. STD XS. XXS	.. 40 80 160.	5S 10S 40S 80S..	0.065 0.083 0.113 0.154 0.219 0.308	0.920 0.884 0.824 0.742 0.612 0.434
1	1.315	.. STD XS. XXS	.. 40 80 160.	5S 10S 40S 80S..	0.065 0.109 0.133 0.179 0.250 0.358	1.185 1.097 1.049 0.957 0.815 0.599
1 1/4	1.66	.. STD XS. XXS	.. 40 80 160.	5S 10S 40S 80S..	0.065 0.109 0.140 0.191 0.250 0.382	1.530 1.442 1.380 1.278 1.160 0.896
1 1/2	1.9	.. STD XS. XXS	.. 40 80 160.	5S 10S 40S 80S..	0.065 0.109 0.145 0.200 0.281 0.400	1.770 1.682 1.610 1.500 1.338 1.100
2	2.375	.. STD XS. XXS	.. 40 80 160.	5S 10S 40S 80S..	0.065 0.109 0.154 0.218 0.344 0.436	2.245 2.157 2.067 1.939 1.687 1.503
2 1/2	2.875	.. STD XS. XXS	.. 40 80 160.	5S 10S 40S 80S..	0.083 0.120 0.203 0.276 0.375 0.552	2.709 2.635 2.469 2.323 2.125 1.771
3	3.5	.. STD XS. XXS	.. 40 80 160.	5S 10S 40S 80S..	0.083 0.120 0.216 0.300 0.438 0.600	3.334 3.260 3.068 2.900 2.624 2.300
3 1/2	4	.. STD XS	.. 40 80	5S 10S 40S 80S	0.083 0.120 0.226 0.318	3.834 3.760 3.548 3.364
4	4.5	.. STD XS.. XXS	.. 40 80 120 160.	5S 10S 40S 80S...	0.083 0.120 0.237 0.337 0.438 0.531 0.674	4.334 4.260 4.026 3.826 3.624 3.438 3.152
5	5.563	.. STD XS.. XXS	.. 40 80 120 160.	5S 10S 40S 80S...	0.109 0.134 0.258 0.375 0.500 0.625 0.750	5.345 5.295 5.047 4.813 4.563 4.313 4.063
6	6.625	.. STD XS.. XXS	.. 40 80 120 160.	5S 10S 40S 80S...	0.109 0.134 0.280 0.432 0.562 0.718 0.864	6.407 6.357 6.065 5.761 5.501 5.189 4.897
8	8.625	.... STD. XS... XXS.	.. 20 30 40 60 80 100 120 140. 160	5S 10S.. 40S. 80S.....	0.109 0.148 0.250 0.277 0.322 0.406 0.500 0.594 0.719 0.812 0.875 0.906	8.407 8.329 8.125 8.071 7.981 7.813 7.625 7.437 7.187 7.001 6.875 6.813
10	10.75	.... STD XS.....	.. 20 30 40 60 80 100 120 140 160	5S 10S.. 40S 80S.....	0.134 0.165 0.250 0.307 0.365 0.500 0.594 0.719 0.844 1.000 1.125	10.482 10.420 10.250 10.136 10.020 9.750 9.562 9.312 9.062 8.750 8.500
12	12.75	.... STD. XS......	.. 20 30. 40. 60 80 100 120 140 160	5S 10S.. 40S. 80S......	0.156 0.180 0.25 0.330 0.375 0.406 0.500 0.562 0.688 0.844 1.000 1.125 1.312	12.438 12.390 12.250 12.090 12.000 11.938 11.750 11.626 11.374 11.062 10.750 10.500 10.126
14	14	.... STD. XS..... ..	.. 10 20 30 40. 60 80 100 120 140 160	5S 10S...........	0.156 0.188 0.250 0.312 0.375 0.438 0.500 0.594 0.750 0.938 1.094 1.250 1.406	13.688 13.624 13.500 13.376 13.250 13.124 13.000 12.812 12.500 12.124 11.812 11.500 11.188
16	16	.... STD XS......	.. 10 20 30 40 60 80 100 120 140 160	5S 10S..........	0.165 0.188 0.250 0.312 0.375 0.500 0.656 0.844 1.031 1.219 1.438 1.594	15.670 15.624 15.500 15.376 15.250 15.000 14.688 14.312 13.938 13.562 13.124 12.812
18	18	.... STD. XS.......	.. 10 20. 30. 40 60 80 100 120 140 160	5S 10S............	0.165 0.188 0.250 0.312 0.375 0.438 0.500 0.562 0.750 0.938 1.156 1.375 1.562 1.781	17.670 17.624 17.500 17.376 17.250 17.124 17.000 16.876 16.500 16.124 15.688 15.250 14.876 14.438

Source: engineeringtoolbox.com

ASME/ANSI B36.10/19 - Carbon, Alloy and Stainless Steel Pipes - Properties

21 rows

ASME/ANSI B36.10/19 - Carbon, Alloy and Stainless Steel Pipes - Properties
- a - (square inches)	- A - (square feet)	Transverse Internal Area	Transverse Internal Area	Area Moment of Inertia - l - (inches4)	Weight Pipe (pounds per foot)	Weight Water (pounds per foot)	External Surface (square feet per foot of pipe)	Elastic Section Modulus - S -(in3)
1/8	0.0548 0.0720 0.0925	0.0740 0.0568 0.0364	0.00051 0.00040 0.00025	0.00088 0.00106 0.00122	0.19 0.24 0.31	0.032 0.025 0.016	0.106 0.106 0.106	0.00437 0.00523 0.00602
1/4	0.0970 0.1250 0.1574	0.1320 0.1041 0.0716	0.00091 0.00072 0.00050	0.00279 0.00331 0.00377	0.33 0.42 0.54	0.057 0.045 0.031	0.141 0.141 0.141	0.01032 0.01227 0.01395
3/8	0.1246 0.1670 0.2173	0.2333 0.1910 0.1405	0.00162 0.00133 0.00098	0.00586 0.00729 0.00862	0.42 0.57 0.74	0.101 0.083 0.061	0.178 0.178 0.178	0.01736 0.02160 0.02554
1/2	0.1583 0.1974 0.2503 0.3200 0.3836 0.5043	0.3959 0.3568 0.3040 0.2340 0.1706 0.050	0.00275 0.00248 0.00211 0.00163 0.00118 0.00035	0.01197 0.01431 0.01709 0.02008 0.02212 0.02424	0.54 0.67 0.85 1.09 1.31 1.71	0.172 0.155 0.132 0.102 0.074 0.022	0.220 0.220 220 0.220 220 0.220	0.02849 0.03407 0.04069 0.04780 0.05267 0.05772
3/4	0.2011 0.2521 0.3326 0.4335 0.5698 0.7180	0.6648 0.6138 0.5330 0.4330 0.2961 0.148	0.00462 0.00426 0.00371 0.00300 0.00206 0.00103	0.02450 0.02969 0.03704 0.04479 0.05269 0.05792	0.69 0.86 1.13 1.47 1.94 2.44	0.288 0.266 0.231 0.188 0.128 0.064	0.275 0.275 0.275 0.275 0.275 0.275	0.04667 0.05655 0.07055 0.08531 0.10036 0.11032
1	0.2553 0.4130 0.4939 0.6388 0.8365 1.0760	1.1029 0.9452 0.8640 0.7190 0.5217 0.282	0.00766 0.00656 0.00600 0.00499 0.00362 0.00196	0.04999 0.07569 0.08734 0.1056 0.1251 0.1405	0.87 1.40 1.68 2.17 2.84 3.66	0.478 0.409 0.375 0.312 0.230 0.122	0.344 0.344 0.344 0.344 0.344 0.344	0.07603 0.11512 0.1328 0.1606 0.1903 0.2136
1 1/4	0.3257 0.4717 0.6685 0.8815 1.1070 1.534	1.839 1.633 1.495 1.283 1.057 0.630	0.01277 0.01134 0.01040 0.00891 0.00734 0.00438	0.1038 0.1605 0.1947 0.2418 0.2839 0.3411	1.11 1.81 2.27 3.00 3.76 5.21	0.797 0.708 0.649 0.555 0.458 0.273	0.435 0.435 0.435 0.435 0.435 0.435	0.1250 0.1934 0.2346 0.2913 0.3421 0.4110
1 1/2	0.3747 0.6133 0.7995 1.068 1.429 1.885	2.461 2.222 2.036 1.767 1.406 0.950	0.01709 0.01543 0.01414 0.01225 0.00976 0.00660	0.1579 0.2468 0.3099 0.3912 0.4824 0.5678	1.28 2.09 2.72 3.63 4.86 6.41	1.066 0.963 0.882 0.765 0.608 0.42	0.497 0.497 0.497 0.497 0.497 0.497	0.1662 0.2598 0.3262 0.4118 0.5078 0.5977
2	0.4717 0.7760 1.075 1.477 2.190 2.656	3.958 3.654 3.355 2.953 2.241 1.774	0.02749 0.02538 0.02330 0.02050 0.01556 0.01232	0.3149 0.4992 0.6657 0.8679 1.162 1.311	1.61 2.64 3.65 5.02 7.46 9.03	1.72 1.58 1.45 1.28 0.97 0.77	0.622 0.622 0.622 0.622 0.622 0.622	0.2652 0.4204 0.5606 0.7309 0.979 1.104
2 1/2	0.7280 1.039 1.704 2.254 2.945 4.028	5.764 5.453 4.788 4.238 3.546 2.464	0.04002 0.03787 0.03322 0.02942 0.02463 0.01710	0.7100 0.9873 1.530 1.924 2.353 2.871	2.48 3.53 5.79 7.66 10.01 13.69	2.50 2.36 2.07 1.87 1.54 1.07	0.753 0.753 0.753 0.753 0.753 0.753	0.4939 0.6868 1.064 1.339 1.638 1.997
3	0.8910 1.274 2.228 3.016 4.205 5.466	8.730 8.347 7.393 6.605 5.408 4.155	0.06063 0.05796 0.05130 0.04587 0.03755 0.02885	1.301 1.822 3.017 3.894 5.032 5.993	3.03 4.33 7.58 10.25 14.32 18.58	3.78 3.62 3.20 2.6 2.35 1.80	0.916 0.916 0.916 0.916 0.916 0.916	0.7435 1.041 1.724 2.225 2.876 3.424
3 1/2	1.021 1.463 2.680 3.678	11.545 11.104 9.886 8.888	0.08017 0.07711 0.06870 0.06170	1.960 2.755 4.788 6.280	3.48 4.97 9.11 12.50	5.00 4.81 4.29 3.84	1.047 1.047 1.047 1.047	0.9799 1.378 2.394 3.140
4	1.152 1.651 3.174 4.407 5.595 6.621 8.101	14.75 14.25 12.73 11.50 10.31 9.28 7.80	0.10245 0.09898 0.08840 0.07986 0.0716 0.0645 0.0542	2.810 3.963 7.233 9.610 11.65 13.27 15.28	3.92 5.61 10.79 14.98 19.0 22.51 27.54	6.39 6.18 5.50 4.98 4.47 4.02 3.38	1.178 1.178 1.178 1.178 1.178 1.178 1.178	1.249 1.761 3.214 4.271 5.178 5.898 6.791
5	1.868 2.285 4.300 6.112 7.953 9.696 11.340	22.44 22.02 20.01 18.19 16.35 14.61 12.97	0.1558 0.1529 0.1390 0.1263 0.1136 0.1015 0.0901	6.947 8.425 15.16 20.67 25.73 30.03 33.63	6.36 7.77 14.62 20.78 27.04 32.96 38.55	9.72 9.54 8.67 7.88 7.09 6.33 5.61	1.456 1.456 1.456 1.456 1.456 1.456 1.456	2.498 3.029 5.451 7.431 9.250 10.796 12.090
6	2.231 2.733 5.581 8.405 10.70 13.32 15.64	32.24 31.74 28.89 26.07 23.77 21.15 18.84	0.2239 0.2204 0.2006 0.1810 0.1650 0.1469 0.1308	11.85 14.40 28.14 40.49 49.61 58.97 66.33	7.60 9.29 18.97 28.57 36.39 45.35 53.16	13.97 13.75 12.51 11.29 10.30 9.16 8.16	1.734 1.734 1.734 1.734 1.734 1.734 1.734	3.576 4.346 8.496 12.22 14.98 17.81 20.02
8	2.916 3.941 6.57 7.26 8.40 10.48 12.76 14.96 17.84 19.93 21.30 21.97	55.51 54.48 51.85 51.16 50.03 47.94 45.66 43.46 40.59 38.50 37.12 36.46	0.3855 0.3784 0.3601 0.3553 0.3474 0.3329 0.3171 0.3018 0.2819 0.2673 0.2578 0.2532	26.44 35.41 57.72 63.35 72.49 88.73 105.7 121.3 140.5 153.7 162.0 165.9	9.93 13.40 22.36 24.70 28.55 35.64 43.39 50.95 60.71 67.76 72.42 74.69	24.06 23.61 22.47 22.17 21.70 20.77 19.78 18.83 17.59 16.68 16.10 15.80	2.258 2.258 2.258 2.258 2.258 2.258 2.258 2.258 2.258 2.258 2.258 2.258	6.131 8.212 13.39 14.69 16.81 20.58 24.51 28.14 32.58 35.65 37.56 38.48
10	4.36 5.49 8.24 10.07 11.90 16.10 18.92 22.63 26.24 30.63 34.02	86.29 85.28 82.52 80.69 78.86 74.66 71.84 68.13 64.53 60.13 56.75	0.5992 0.5922 0.5731 0.5603 0.5475 0.5185 0.4989 0.4732 0.4481 0.4176 0.3941	63.0 76.9 113.7 137.4 160.7 212.0 244.8 286.1 324.2 367.8 399.3	15.19 18.65 28.04 34.24 40.48 54.74 64.43 77.03 89.29 104.13 115.64	37.39 36.95 35.76 34.96 34.20 32.35 31.13 29.53 27.96 26.06 24.59	2.814 2.814 2.814 2.814 2.814 2.814 2.814 2.814 2.814 2.814 2.814	11.71 14.30 21.15 25.57 29.90 39.43 45.54 53.22 60.32 68.43 74.29
12	6.17 7.11 9.82 12.87 14.58 15.77 19.24 21.52 26.03 31.53 36.91 41.08 47.14	121.50 120.57 117.86 114.80 113.10 111.93 108.43 106.16 101.64 96.14 90.76 86.59 80.53	0.8438 0.8373 0.8185 0.7972 0.7854 0.7773 0.7528 0.7372 0.7058 0.6677 0.6303 0.6013 0.5592	122.4 140.4 191.8 248.4 279.3 300.3 361.5 400.4 475.1 561.6 641.6 700.5 781.1	20.98 24.17 33.38 43.77 49.56 53.52 65.42 73.15 88.63 107.32 125.49 139.67 160.27	52.65 52.25 51.07 49.74 49.00 48.50 46.92 46.00 44.04 41.66 39.33 37.52 34.89	3.338 3.338 3.338 3.338 3.338 3.338 3.338 3.338 3.338 3.338 3.338 3.338 3.338	19.2 22.0 30.2 39.0 43.8 47.1 56.7 62.8 74.6 88.1 100.7 109.9 122.6
14	6.78 8.16 10.80 13.42 16.05 18.66 21.21 24.98 31.22 38.45 44.32 50.07 55.63	147.15 145.78 143.14 140.52 137.88 135.28 132.73 128.96 122.72 115.49 109.62 103.87 98.31	1.0219 1.0124 0.9940 0.9758 0.9575 0.9394 0.9217 0.8956 0.8522 0.8020 0.7612 0.7213 0.6827	162.6 194.6 255.3 314.4 372.8 429.1 483.8 562.3 678.3 824.4 929.6 1027.0 1117.0	23.07 27.73 36.71 45.61 54.57 63.44 72.09 85.05 106.13 130.85 150.79 170.28 189.11	63.77 63.17 62.03 60.89 59.75 58.64 57.46 55.86 53.18 50.04 47.45 45.01 42.60	3.665 3.665 3.665 3.665 3.665 3.665 3.665 3.665 3.665 3.665 3.665 3.665 3.665	23.2 27.8 36.6 45.0 53.2 61.3 69.1 80.3 98.2 117.8 132.8 146.8 159.6
16	8.21 9.34 12.37 15.38 18.41 24.35 31.62 40.14 48.48 56.56 65.78 72.10	192.85 191.72 188.69 185.69 182.65 176.72 169.44 160.92 152.58 144.50 135.28 128.96	1.3393 1.3314 1.3103 1.2895 1.2684 1.2272 1.1766 1.175 1.0596 1.0035 0.9394 0.8956	257.3 291.9 383.7 473.2 562.1 731.9 932.4 1155.8 1364.5 1555.8 1760.3 1893.5	27.90 31.75 42.05 52.27 62.58 82.77 107.50 136.61 164.82 192.43 223.64 245.25	83.57 83.08 81.74 80.50 79.12 76.58 73.42 69.73 66.12 62.62 58.64 55.83	4.189 4.189 4.189 4.189 4.189 4.189 4.189 4.189 4.189 4.189 4.189 4.189	32.2 36.5 48.0 59.2 70.3 91.5 116.6 144.5 170.5 194.5 220.0 236.7
18	9.25 10.52 13.94 17.34 20.76 24.17 27.49 30.79 40.64 50.23 61.17 71.81 80.66 90.75	245.22 243.95 240.53 237.13 233.71 230.30 226.98 223.68 213.83 204.24 193.30 182.66 173.80 163.72	1.7029 1.6941 1.6703 1.6467 1.6230 1.5990 1.5763 1.5533 1.4849 1.4183 1.3423 1.2684 1.2070 1.1369	367.6 417.3 549.1 678.2 806.7 930.3 1053.2 1171.5 1514.7 1833.0 2180.0 2498.1 2749.0 3020.0	31.43 35.76 47.39 58.94 70.59 82.15 93.45 104.67 138.17 170.92 207.96 244.14 274.22 308.50	106.26 105.71 104.21 102.77 101.18 99.84 98.27 96.93 92.57 88.50 83.76 79.07 75.32 70.88	4.712 4.712 4.712 4.712 4.712 4.712 4.712 4.712 4.712 4.712 4.712 4.712 4.712 4.712	40.8 46.4 61.1 75.5 89.6 103.4 117.0 130.1 168.3 203.8 242.3 277.6 305.5 335.6

Source: engineeringtoolbox.com

Engineering Notes

Manufacturing tolerances on outside diameter are small but non-zero; the values listed are nominal per ASME/ANSI B36.10/19.
Stainless steel pipes (B36.19) use the same outside diameters as carbon steel but have thinner walls for some schedules (e.g., 5S, 10S) that do not exist in B36.10.
Schedule 160 and XXS provide significantly thicker walls for high-pressure service. XXS walls are thicker than Sch 160 for sizes 1/2 in through 6 in.
Pipe weight depends on material density; the tables assume carbon steel at 490 lb/ft³. Adjust proportionally for other alloys.
Water weight assumes full bore and a density of 62.4 lb/ft³.
For metric equivalents: 1 in = 25.4 mm; 1 lb/ft = 1.488 kg/m.

References

Original Source — Engineering ToolBox: Steel Pipes Dimensions
ASME/ANSI B36.10 — Welded and Seamless Wrought Steel Pipe
ASME/ANSI B36.19 — Stainless Steel Pipe

Source: engineeringtoolbox.com