Carbon Steel Pipe Dimensions Chart


Welded Carbon Steel Pipe	Seamless Carbon Steel Pipe

Nominal size (NPS)		OD	Welded & Seamless Carbon Steel Pipe to ASME B36.10M
DN	NPS	mm	10	20	30	40	Std	60	80	XS	100	120	140	160	XXS
6	1/8	10.3	1.24		1.45	1.73	1.73		2.41	2.41
8	1/4	13.7	1.65		1.85	2.24	2.24		3.02	3.02
10	3/8	17.1	1.65		1.85	2.31	2.31		3.2	3.2
15	1/2	21.3	2.11		2.41	2.77	2.77		3.73	3.73				4.78	7.47
20	3/4	26.7	2.11		2.41	2.87	2.87			3.91				5.56	7.82
25	1	33.4	2.77		2.9	3.38	3.38		4.55	4.55				6.35	9.09
32	1 1/4	42.2	2.77		2.97	3.56	3.56		4.85	4.85				6.35	9.7
40	1 1/2	48.3	2.77		3.18	3.68	3.68		5.08	5.08				7.14	10.15
50	2	60.3	2.77		3.18	3.91	3.91		5.54	5.54				8.74	11.07
65	2 1/2	73	3.05		4.78	5.16	5.16		7.01	7.01				9.53	14.02
80	3	88.9	3.05		4.78	5.49	5.49		7.62	7.62				11.13	15.24
90	3 1/2	101.6	3.05		4.78	5.74	5.74		8.08	8.08
100	4	114.3	3.05		4.78	6.02	6.02		8.56	8.56		11.13		13.49	17.12
125	5	141.3	3.4			6.55	6.55		9.53	9.53		12.7		15.88	19.05
150	6	168.3	3.4			7.11	7.11		10.97	10.97		14.27		18.26	21.95
200	8	219.1	3.76	6.35	7.04	8.18	8.18	10.31	12.7	12.7	15.09	18.26	20.62	23.01	22.23
250	10	273	4.19	6.35	7.8	9.27	9.27	12.7	15.09	12.7	18.26	21.44	25.4	28.58	25.4
300	12	323.8	4.57	6.35	8.38	10.31	9.53	14.27	17.48	12.7	21.44	25.4	28.58	33.32	25.4
350	14	355.6	6.35	7.92	9.53	11.13	9.53	15.09	19.05	12.7	23.83	27.79	31.75	35.71
400	16	406.4	6.35	7.92	9.53	12.7	9.53	16.66	21.44	12.7	26.19	30.96	36.53	40.49
450	18	457	6.35	7.92	11.13	14.27	9.53	19.05	23.83	12.7	29.36	34.93	39.67	45.24
500	20	508	6.35	9.53	12.7	15.09	9.53	20.62	26.19	12.7	32.54	38.1	44.45	50.01
550	22	559	6.35	9.53	12.7		9.53	22.23	28.58	12.7	34.93	41.28	47.63	53.98
600	24	610	6.35	9.53	14.27	17.48	9.53	24.61	30.96	12.7	38.89	46.02	52.37	59.54
650	26	660	7.92	12.7			9.53			12.7
700	28	711	7.92	12.7	15.88		9.53			12.7
750	30	762	7.92	12.7	15.88		9.53			12.7
800	32	813	7.92	12.7	15.88	17.48	9.53			12.7
850	34	864	7.92	12.7	15.88	17.48	9.53			12.7
900	36	914	7.92	12.7	15.88	19.05	9.53			12.7
950	38	965					9.53			12.7
1000	40	1016					9.53			12.7
1050	42	1067					9.53			12.7
1100	44	1118					9.53			12.7
1150	46	1168					9.53			12.7
1200	48	1219					9.53			12.7

Common applications of carbon steel pipes with different specifications

Small-sized carbon steel pipes (1/8 inch - 1 inch)
Instrumentation pipelines
some small machine tools and automated equipment
Laboratory and scientific research equipment

Medium-sized carbon steel pipes (1 1/4 inch - 4 inches)
Building water supply and drainage systems
Pipeline systems in industrial plants
Heating, ventilation, and air conditioning systems

Large-sized carbon steel pipes (5 inches and above)
Used for long-distance transportation of energy resources such as oil and natural gas.
Used as the main pipelines of urban heating and cooling systems to transport hot water or cold water.
Process pipelines of large industrial equipment

Welded & Seamless Carbon Steel Pipe to ASME B36.10M

Common applications of carbon steel pipes with different specifications