Pipe Size Dimensions Chart

Steel Pipe Dimensions Chart (Size Chart)

Nominal Pipe Size		Outside Diameter (mm)	Nominal Wall Thickness Schedule
NPS	DN	OD	SCH 5S	SCH l0S	SCH 10	SCH 20	SCH 30	SCH 40S	SCH STD	SCH 40	SCH 60	SCH 80s	SCH XS	SCH 80	SCH 100	SCH 120	SCH 140	SCH 160	SCH XXS
1/8	6	10.3		1.24				1.73	1.73	1.73		2.41	2.41	2.41
1/4	8	13.7		1.65				2.24	2.24	2.24		3.02	3.02	3.02
3/8	10	17.1		1.65				2.31	2,31	2.31		3.2	3.2	3.2
1/2	15	21.3	1.65	2.11				2.77	2.77	2.77		3.73	3.73	3.73				4.78	7.47
3/4	20	26.7	1.65	2.11				2.87	2.87	2.87		3.91	3.91	3.91				5.56	7.82
1	25	33.4	1.65	2.77				3.38	3.38	3.38		4.55	4.55	4.55				6.35	9.09
1 1/4	32	42.2	1.65	2.77				3.56	3.56	3,56		4.85	4.85	4.85				6.35	9.7
1 1/2	40	48.3	1.65	2.77				3.68	3.68	3.68		5.08	5.08	5.08				7.14	10.15
2	50	60.3	1.65	2.77				3.91	3.91	3.91		5.54	5.54	5.54				8.74	11.07
2 1/2	65	73	2.11	3.05				5.16	5.16	5.16		7.01	7.01	7.01				9.53	14.02
3	80	88.9	2.11	3.05				5.49	5.49	5.49		7.62	7.62	7.62				11.13	15.24
3 1/2	90	101.6	2.11	3.05				5.74	5.74	5.74		8.08	8.08	8.08
4	100	114.3	2.11	3.05				6.02	6.02	6.02		8.56	8.56	8.56		11.13		13.49	17.12
5	125	141.3	2.77	3.4				6.55	6.55	6.55		9.53	9,53	9.53		12.7		15.88	19.05
6	150	168.3	2.77	3.4				7.11	7.11	7.11		10.97	10.97	10.97		14.27		18.26	21.95
8	200	219.1	2.77	3.76		6.35	7.04	8.18	8.18	8.18	10.31	12.7	12.7	12.7	15.09	18.26	20.62	23.01	22.23
10	250	273.1	3.4	4.19		6.35	7.8	9.27	9.27	9.27	12.7	12.7	12.7	15.09	18.26	21.44	25.4	28.58	25.4
12	300	323.9	3.96	4.57		6.35	8.38	9.53	9.53	10.31	14.27	12.7	12.7	17.48	21.44	25.4	28.58	33.32	25.4
14	350	355.6	3.96	4.78	6.35	7.92	9.53		9.53	11.13	15.09		12.7	19.05	23.83	27.79	31.75	35.71
16	400	406.4	4.19	4.78	6.35	7.92	9.53		9.53	12.7	i6.66		12.7	21.44	26.19	30.96	36.53	40.49
18	450	457.2	4.19	4.78	6.35	7.92	11.13		9.53	14.27	19.05		12.7	23.83	29.36	34.93	39,67	45.24
20	500	508	4.78	5.54	6.35	9.53	12.7		9.53	15.09	20.62		12.7	26.19	32.54	38.1	44.45	50.01
22		559	4.78	5.54	6.35	9.53	12.7		9.53		22.23		12.7	28.58	34.93	41.28	47.63	53.98
24	600	610	5.54	6.35	6.35	9.53	14.27		9.53	17.48	24.61		12.7	30.96	38.89	46.02	52.37	59.54
26		660			7.92	12.7			9.53				12.7
28	700	711			7.92	12.7	15.88		9.53				12.7
30		762	6.35	7.92	7.92	12.7	15.88		9.53				12.7
32	800	813			7.92	12.7	15.88		9.53	17.48			12.7
34		884			7.92	12.7	15.88		9.53	17.48			12.7
36	900	914			7.92	12.7	15.88		9.53	19.05			12.7
38		965							9.53				12.7
40	1000	1016						9.53		12.7
42		1067				12.7	15.88		9.53	19.05			12.7
44	1100	1118							9.53				12.7
46		1168							9.53				12.7
48	1200	1219							9.53			12.7
52		1321
56	1422
60	1524

What is A Pipe Schedule?

A pipe schedule is a system that indicates the wall thickness of a pipe. It helps determine how strong the pipe is and how much pressure it can handle. Higher schedule numbers mean thicker walls and stronger pipes. For example, Schedule 40 pipes are standard thickness, while Schedule 80 pipes are thicker and can handle more pressure.

What is Nominal Size Of Pipe?

The nominal size of a pipe is a standard way to label pipes based on their approximate inner diameter (ID). It doesn’t exactly match the pipe’s actual inside or outside diameter but is used as a convenient way to refer to the size. For instance, the pipe having a size of 2 inch nominal has a different actual diameter than 2 inch. This also aids in developing sizes for the manufacturing of pipes, and for joining them appropriately with each other.

What is Nominal Wall Thickness?

Nominal wall thickness is the specified or standard thickness of a pipe’s wall, not accounting for manufacturing tolerances or variations. It is an approximate value used for design and classification purposes, helping engineers determine a pipe’s strength and pressure-handling capacity. It is often associated with pipe schedules to define the pipe’s overall characteristics.