American Standard Weldon and Seamless Steel Pipe Chart Reference

Pipe			Pipe Schedules (All Dimensions in Inches)
Size	OD	Wall ID	5	10	20	30	STANDARD	40	60	EX. HVY.	80	100	120	140	160	DBLE. EX. HVY.
1/8	.405	Wall ID	.035	.049	–	–	.068		–	.095		–	–	–	–	–
1/8	.405	Wall ID	.335	.307	–	–	.269		–	.215		–	–	–	–	–
1/4	.540	Wall ID	.049	.065	–	–	.088		–	.119		–	–	–	–	–
1/4	.540	Wall ID	.442	.410	–	–	.364		–	.302		–	–	–	–	–
3/8	.675	Wall ID	.049	.065	–	–	.091		–	.126		–	–	–	–	–
3/8	.675	Wall ID	.577	.545	–	–	.493		–	.423		–	–	–	–	–
1/2	.840	Wall ID	.065	.083	–	–	.109		–	.147		–	–	–	.187	.294
1/2	.840	Wall ID	.710	.674	–	–	.622		–	.546		–	–	–	.466	.252
3/4	1.050	Wall ID	.065	.083	–	–	.113		–	.154		–	–	–	.218	.308
3/4	1.050	Wall ID	.920	.884	–	–	.824		–	.742		–	–	–	.614	.434
1	1.315	Wall ID	.065	.109	–	–	.133		–	.179		–	–	–	.250	.358
1	1.315	Wall ID	1.185	1.097	–	–	1.049		–	.957		–	–	–	.815	.599
1-1/4	1.660	Wall ID	.065	.109	–	–	.140		–	.191		–	–	–	.250	.382
1-1/4	1.660	Wall ID	1.530	1.442	–	–	1.380		–	1.278		–	–	–	1.160	.896
1-1/2	1.900	Wall ID	.065	.109	–	–	.145		–	.200		–	–	–	.281	.400
1-1/2	1.900	Wall ID	1.770	1.682	–	–	1.610		–	1.500		–	–	–	1.338	1.100
2	2.375	Wall ID	.065	.109	–	–	.154		–	.218		–	–	–	.343	.436
2	2.375	Wall ID	2.245	2.157	–	–	2.067		–	1.939		–	–	–	1.689	1.503
2-1/2	2.875	Wall ID	.083	.120	–	–	.203		–	.276		–	–	–	.375	.552
2-1/2	2.875	Wall ID	2.709	2.635	–	–	2.469		–	2.323		–	–	–	2.125	1.771
3	3.500	Wall ID	.083	.120	–	–	.216		–	.300		–	–	–	.438	.600
3	3.500	Wall ID	3.334	3.260	–	–	3.068		–	2.900		–	–	–	2.624	2.300
3-1/2	4.000	Wall ID	.083	.120	–	–	.226		–	.318		–	–	–	–	.636
3-1/2	4.000	Wall ID	3.834	3.760	–	–	3.548		–	3.364		–	–	–	–	2.728
4	4.500	Wall ID	.083	.120	–	–	.237		.218	.337		–	.438	–	.531	.674
4	4.500	Wall ID	4.334	4.260	–	–	4.026		4.064	3.826		–	3.624	–	3.438	3.152
4-1/2	5.000	Wall ID	–	.134	–	–	.247		–	.355		–	–	–	–	.710
4-1/2	5.000	Wall ID	–	4.732	–	–	4.506		–	4.290		–	–	–	–	3.580
5	5.563	Wall ID	.109	.134	–	–	.258		–	.375		–	,500	–	.625	.750
5	5.563	Wall ID	5.345	5.295	–	–	5.047		–	4.813		–	4.563	–	4.313	4.063
6	6.625	Wall ID	.109	.134	–	.250	.280		–	.432		–	.562	–	.718	.864
6	6.625	Wall ID	6.407	6.357	–	6.125`	6.065		–	5.761		–	5.501	–	5.189	4.897
7	7.625	Wall ID	–	–	–	–	.301		–	.500		–	–	–	–	.875
7	7.625	Wall ID	–	–	–	–	7.023		–	6.625		–	–	–	–	5.875
8	8.625	Wall ID	.109	.148	.250	.277	.322		.406	.500		.593	.718	.812	.906	.875
8	8.625	Wall ID	8.407	8.329	8.125	8.071	7.981		7.813	7.625		7.439	7.189	7.001	6.813	6.875
10	10.750	Wall ID	.134	.165	.250	.307	.365		.500	.500	.593	.718	.843	1.000	1.125	–
10	10.750	Wall ID	10.482	10.420	10.250	10.136	10.020		9.750	9.750	9.564	9.314	9.064	8.750	8.500	–
12	12.750	Wall ID	.165	.180	.250	.330	.375	.406	.562	.500	.687	.843	1.000	1.125	1.312	–
12	12.750	Wall ID	12.420	12.390	12.250	12.090	12.000	11.938	11.626	11.750	11.376	11.064	10.750	10.500	10.126	–
14	14.000	Wall ID	–	.250	.312	.375	.375	.437	.594	.500	.750	.937	1.094	1.250	1.406	–
14	14.000	Wall ID	–	13.500	13.376	13.250	13.250	13.126	12.812	13.000	12.500	12.126	11.812	11.500	11.188	–
16	16.000	Wall ID	–	.250	.312	.375	.375	.500	.656	.500	.843	1.031	1.218	1.437	1.593	–
16	16.000	Wall ID	–	15.500	15.376	15.250	15.250	15.000	14.688	15.000	14.314	13.938	13.564	13.126	12.814	–
18	18.000	Wall ID	–	.250	.312	.438	.375	.562	.750	.500	.937	1.156	1.375	1.562	1.781	–
18	18.000	Wall ID	–	17.500	17.376	17.124	17.250	16.876	16.500	17.000	16.126	15.688	15.250	14.876	14.438	–
20	20.000	Wall ID	–	.250	.375	.500	.375	.593	.812	.500	1.031	1.280	1.500	1.750	1.968	–
20	20.000	Wall ID	–	19.500	19.250	19.000	19.250	18.814	18.376	19.000	17.938	17.440	17.000	16.500	16.064	–
24	24.000	Wall ID	–	.250	.375	.562	.375	.687	.969	.500	1.218	1.531	1.812	2.062	2.343	–
24	24.000	Wall ID	–	25.500	23.250	22.876	23.250	22.626	22.062	23.000	21.564	20.938	20.376	19.876	19.314	–