Standard Pipe Schedules and Sizes

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The following chart gives standard pipe schedule or pipes sizes as given by ANSI / ASME B36.10M and API 5L .

ANSI - American National Standards Institute
ASME - American Society of Mechanical Engineers
API = American Petroleum Institute

Nominal	O.D. Inches	PIPE SCHEDULES WALL THICKNESS
Nominal	O.D. Inches	5s	5	10s	10	20	30	40s & Std	40	60	80s & E.H.	80	100	120	140	160	Dbl. E.H.
1/8	.405		.035	.049	.049			.068	.068		.095	.095
1/4	.540		.049	.065	.065			.088	.088		.119	.119
3/8	.675		.049	.065	.065			.091	.091		.126	.126
1/2	.840	.065	.065	.083	.083			.109	.109		.147	.147				.187	.294
3/4	1.050	.065	.065	.083	.083			.113	.113		.154	.154				.218	.308
1	1.315	.065	.065	.109	.109			.133	.133		.179	.179				.250	.358
1 1/4	1.660	.065	.065	.109	.109			.140	.140		.191	.191				.250	.382
1 1/2	1.900	.065	.065	.109	.109			.145	.145		.200	.200				.281	.400
2	2.375	.065	.065	.109	.109			.154	.154		.218	.218				.343	.436
2 1/2	2.875	.083	.083	.120	.120			.203	.203		.276	.276				.375	.552
3	3.500	.083	.083	.120	.120			.216	.216		.300	.300				.437	.600
3 1/2	4.000	.083	.083	.120	.120			.226	.226		.318	.318					.636
4	4.500	.083	.083	.120	.120			.237	.237	.281	.337	.337		.437		.531	.674
4 1/2	5.000							.247			.355						.710
5	5.563	.109	.109	.134	.134			.258	.258		.375	.375		.500		.625	.750
6	6.625	.109	.109	.134	.134			.280	.280		.432	.432		.562		.718	.864
7	7.625							.301			.500						.875
8	8.625	.109	.109	.148	.148	.250	.277	.322	.322	.406	.500	.500	.593	.718	.812	.906	.875
9	9.625							.342			.500
10	10.750	.134	.134	.165	.165	.250	.307	.365	.365	.500	.500	.593	.718	.843	1.000	1.125
11	11.750							.375			.500
12	12.750	.156	.165	.180	.180	.250	.330	.375	.406	.562	.500	.687	.843	1.000	1.125	1.312
14	14.000	.156		.188	.250	.312	.375	.375	.437	.593	.500	.750	.937	1.093	1.250	1.406
16	16.000	.165		.188	.250	.312	.375	.375	.500	.656	.500	.843	1.031	1.218	1.437	1.593
18	18.000	.165		.188	.250	.312	.437	.375	.562	.750	.500	.937	1.156	1.375	1.562	1.781
20	20.000	.188		.218	.250	.375	.500	.375	.593	.812	.500	1.031	1.280	1.500	1.750	1.968
24	24.000	.218		.250	.250	.375	.562	.375	.687	.968	.500	1.218	1.531	1.812	2.062	2.343
26	26.000				.312	.500		.375			.500
28	28.000				312	.500	.625	.375
30	30.000	.250		.312	.312	.500	.625	.375			.500
32	32.000				.312	.500	.625	.375	.688		.500
34	34.00				.312	.500	.625	.375	.688
36	36.000				.312		.625	.375	.750		.500