The Latest Pipe Size Chart

Pipes are used in mechanical engineering across different industries.
Pipes are hollow; this means they have an outer diameter and an inner diameter dimension.
The wall thickness of a pipe is used to determine whether a pipe s strong enough to withstand the pressure it’ll be put under.
The wall thickness of a pipe also serves to calculate the inner diameter of the pipe.
By subtracting the pipe wall thickness twice from the number that corresponds to the outer diameter you get the inner diameter; this is important as the inner diameter determines the flow velocity and rate.

PIPE SCHEDULES WALL THICKNESS (Inches)

Nominal	O.D. Inches	10s	10	40s & Std	40	80s & E.H.	80	160
1/8	0.405	0.049	0.049	0.068	0.068	0.095	0.095
1/4	0.54	0.065	0.065	0.088	0.088	0.119	0.119
3/8	0.675	0.065	0.065	0.091	0.091	0.126	0.126
1/2	0.84	0.083	0.083	0.109	0.109	0.147	0.147	0.187
3/4	1.05	0.083	0.083	0.113	0.113	0.154	0.154	0.218
1	1.315	0.109	0.109	0.133	0.133	0.179	0.179	0.25
1.25	1.66	0.109	0.109	0.14	0.14	0.191	0.191	0.25
1.5	1.9	0.109	0.109	0.145	0.145	0.2	0.2	0.281
2	2.375	0.109	0.109	0.154	0.154	0.218	0.218	0.343
2.5	2.875	0.12	0.12	0.203	0.203	0.276	0.276	0.375
3	3.5	0.12	0.12	0.216	0.216	0.3	0.3	0.437
3.5	4	0.12	0.12	0.226	0.226	0.318	0.318
4	4.5	0.12	0.12	0.237	0.237	0.337	0.337	0.531
4.5	5			0.247		0.355
5	5.563	0.134	0.134	0.258	0.258	0.375	0.375	0.625
6	6.625	0.134	0.134	0.28	0.28	0.432	0.432	0.718
7	7.625			0.301		0.5
8	8.625	0.148	0.148	0.322	0.322	0.5	0.5	0.906
9	9.625			0.342		0.5
10	10.75	0.165	0.165	0.365	0.365	0.5	0.593	1.125
11	11.75			0.375		0.5
12	12.75	0.18	0.18	0.375	0.406	0.5	0.687	1.312
14	14	0.188	0.25	0.375	0.437	0.5	0.75	1.406
16	16	0.188	0.25	0.375	0.5	0.5	0.843	1.593
18	18	0.188	0.25	0.375	0.562	0.5	0.937	1.781

Pipe Dimensions and Weight

- Wall Thickness in inches
- *Steel weight in lbs. per ft.

SIZE	INCHES	5S	5	10S	10	20	30	40s & STD	40	60	80S & E.H.	80	100	120	140	160	DBLE. E.H.

1/8	0.405		0.035	0.049	0.049			0.068	0.068		0.095	0.095
			*0.1383	*0.1863	*0.1863			*0.2447	*0.2447		0.3145	0.3145
1/4	0.54		0.049	0.065	0.065			0.088	0.088		0.119	0.119
			*0.257	*0.3297	*0.3297			*0.4248	*0.4248		0.5351	0.5351
3/8	0.675		0.049	0.065	0.065			0.091	0.091		0.126	0.126
			*0.3276	*0.4235	*0.4235			*0.5676	*0.5676		0.7338	0.7338
1/2	0.84	0.065	0.065	0.083	0.083			0.109	0.109		0.147	0.147				0.187	0.294
		*0.5383	*0.5383	*0.671	*0.671			*0.851	*0.851		1.088	1.088				1.304	1.714
3/4	1.05	0.065	0.065	0.083	0.083			0.113	0.113		0.154	0.154				0.218	0.308
		*0.6838	*0.6838	*0.8572	*0.8572			*1.131	*1.131		1.474	1.474				1.937	2.441
1	1.315	0.065	0.065	0.109	0.109			0.133	0.133		0.179	0.179				0.25	0.358
		*0.8678	*0.8678	*1.404	*1.404			*1.679	*1.679		2.172	2.172				2.844	3.659
1-1/4	1.66	0.065	0.065	0.109	0.109			0.14	0.14		0.191	0.191				0.25	0.382
		*1.107	*1.107	*1.806	*1.806			*2.273	*2.273		2.997	2.997				3.765	5.214
1-1/2	1.9	0.065	0.065	0.109	0.109			0.145	0.145		0.2	0.2				0.281	0.4
		*1.274	*1.274	*2.085	*2.085			*2.718	*2.718		3.631	3.631				4.859	6.408
2	2.375	0.065	0.065	0.109	0.109			0.154	0.154		0.218	0.218				0.343	0.436
		*1.604	*1.604	*2.638	*2.638			*3.653	*3.653		5.022	5.022				7.444	9.029
2-1/2	2.875	0.083	0.083	0.12	0.12			0.203	0.203		0.276	0.276				0.375	0.552
		*2.475	*2.475	*3.531	*3.531			*5.793	*5.793		7.661	7.661				10.01	13.7
3	3.5	0.083	0.083	0.12	0.12			0.216	0.216		0.3	0.3				0.437	0.6
		*3.029	*3.029	*4.332	*4.332			*7.576	*7.576		10.25	10.25				14.32	18.58
4-1/2	4	0.083	0.083	0.12	0.12			0.226	0.226		0.318	0.318					0.636
		*3.472	*3.472	*4.973	*4.973			*9.109	*9.109		12.51	12.51					22.85
4	4.5	0.083	0.083	0.12	0.12			0.237	0.237	0.281	0.337	0.337		0.437		0.531	0.674
		*3.915	*3.915	*5.613	*5.613			*10.79	*10.79	*12.66	14.98	14.98		19.01		22.51	27.54
4-1/2	5							0.247			0.355						0.71
								12.53			17.61						32.53
5	5.563	0.109	0.109	0.134	0.134			0.258	0.258		0.375	0.375		0.5		0.625	0.75
		*6.349	*6.349	*7.77	*7.77			*14.62	*14.62		20.78	20.78		27.04		32.96	38.55
6	6.625	0.109	0.109	0.134	0.134			0.28	0.28		0.432	0.432		0.562		0.718	0.864
		*7.585	*7.585	*9.29	*9.29			*18.97	*18.97		28.57	28.57		36.39		45.3	53.16
7	7.625							0.301			0.5						0.875
								23.57			38.05						63.08
8	8.625	0.109	0.109	0.148	0.148	0.25	0.277	0.322	0.322	0.406	0.5	0.5	0.593	0.718	0.812	0.906	0.885
				13.4	13.4	22.36	24.7	28.55	28.55	35.64	43.39	43.39	50.87	60.93	67.76	74.69	72.42
9	9.625							0.342			0.5
								33.9			48.72
10	10.75	0.134	0.134	0.165	0.165	0.25	0.307	0.365	0.365	0.5	0.5	0.593	0.718	0.843	1	1.125
		*15.19	*15.19	*18.65	*18.65	*28.04	*34.24	*40.48	*40.48	*54.74	54.74	64.33	76.93	89.2	104.1	115.7
11	11.75							0.375			0.5
								45.55			60.07
12	12.75	0.156	0.165	0.18	0.18	0.25	0.307	0.365	0.365	0.5	0.5	0.593	0.718	0.843	1	1.125
		*21.07	*22.18	*24.17	*24.17	*33.38	*34.24	*40.48	*40.48	*54.74	54.74	64.33	76.93	89.2	104.1	115.7
14	14	0.156		0.188	0.25	0.312	0.375	0.375	0.437	0.593	0.5	0.75	0.937	1.093	1.25	1.406
		*23.07		*27.73	*36.71	*45.38	*54.57	*54.57	*63.37	*84.91	72.09	106.1	130.7	150.7	170.2	189.1
16	16	0.165		0.188	0.25	0.312	0.375	0.375	0.5	0.656	0.5	0.843	1.031	1.218	1.427	1.593
		*27.9		*31.75	*42.05	*52.36	*62.58	*62.58	*82.77	*107.5	82.77	136.5	164.8	192.3	223.5	245.1
18	18	0.165		0.188	0.25	0.312	0.437	0.375	0.562	0.75	0.5	0.937	1.156	1.375	1.562	1.781
		*31.43		*35.76	*47.39	*59.03	*82.06	*70.59	*104.2	*138.2	93.45	170.8	208	244.1	274.2	308.5
20	20	0.188		0.218	0.25	0.375	0.5	0.375	0.593	0.812	0.5	1.031	1.28	1.5	1.75	1.968
		*39.78		*46.05	*52.73	*78.6	*104.1	*78.6	*122.9	*166.4	104.1	208.9	256.1	296.4	341.1	379
22	22	0.188		0.218	0.25	0.375	0.5	0.375		0.875	0.5	1.125	1.375	1.625	1.875	2.125
		*43.8		*50.71	*58.07	*86.61	*114.81	*86.61		*197.41	114.81	250.81	302.88	353.61	403	451.06
24	24	0.218		0.25	0.25	0.375	0.562	0.375	0.687	0.968	0.5	1.218	1.531	1.812	2.062	2.344
		*55.37		*63.41	*63.41	*94.62	*140.8	*94.62	*171.2	*238.1	125.5	296.4	367.4	429.4	483.1	542.13
26	26				0.312	0.5		0.375			0.5
					*85.6	*136.17		*102.63			136.17
28	28				0.312	0.5	0.625	0.375
					*92.26	*146.85	*182.73	*110.64
30	30	0.25		0.312	0.312	0.5	0.625	0.375			0.5
		*79.43		*98.93	*98.93	*157.53	*196.08	*118.65			157.53
32	32				0.312	0.5	0.625	0.375	0.688		0.5
					*105.59	*168.21	*209.43	*126.66	*230.08		168.21
34	34				0.312	0.5	0.625	0.375	0.688
					*112.25	*178.89	*222.78	*134.667	*244.77
36	36				0.312		0.625	0.375	0.75		0.5
					*118.92		*236.13	*142.68	*262.35		189.57

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