API 5L Pipe Dimensions

Release Tme: 2026-04-03

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API line pipe refers to tubular materials for oil and gas transmission that comply with the American Petroleum Institute (API) Standard 5L. Primarily utilized in the petroleum and natural gas industries for the long-distance transport of oil, gas, and water, these pipes encompass two types: seamless pipes and welded steel pipes. The primary material grades cover L245, L360, A53, J55, the X42–X70 series, and Grade X80; Grades X100 and X120 have also been successfully developed. The pipe diameter ranges from 21.3 mm to 914.4 mm, with wall thicknesses ranging from 1.53 mm to 40 mm. Connection methods include butt welding, coupling connections, and socket connections. Applicable standards include GB/T9711, ISO 3183, and API SPEC 5L, with the API SPEC 5L standard comprising two Product Specification Levels: PSL1 and PSL2.

API 5L Pipe Dimensions & Weight Chart (NPS 1/2" to 24")

NPS (Inches)	OD (mm)	Schedule (Sch)	Wall Thickness (mm)	Weight ( kg/m )	Weight (lb/ft)
1/2"	21.3	Sch 40 (STD)	2.77	1.27	0.85
		Sch 80 (XS)	3.73	1.62	1.09
3/4"	26.7	Sch 40 (STD)	2.87	1.69	1.13
		Sch 80 (XS)	3.91	2.20	1.48
1"	33.4	Sch 40 (STD)	3.38	2.50	1.68
		Sch 80 (XS)	4.55	3.24	2.17
1-1/2"	48.3	Sch 40 (STD)	3.68	4.05	2.72
		Sch 80 (XS)	5.08	5.41	3.63
2"	60.3	Sch 40 (STD)	3.91	5.44	3.65
		Sch 80 (XS)	5.54	7.48	5.02
3"	88.9	Sch 40 (STD)	5.49	11.30	7.58
		Sch 80 (XS)	7.62	15.27	10.25
4"	114.3	Sch 40 (STD)	6.02	16.08	10.80
		Sch 80 (XS)	8.56	22.32	14.98
6"	168.3	Sch 40 (STD)	7.11	28.26	18.97
		Sch 80 (XS)	10.97	42.56	28.57
8"	219.1	Sch 40 (STD)	8.18	42.55	28.55
		Sch 80 (XS)	12.70	64.64	43.39
10"	273.1	Sch 40 (STD)	9.27	60.31	40.48
		Sch 80 (XS)	15.09	95.97	64.43
12"	323.9	Sch STD	9.53	73.86	49.56
		Sch 80 (XS)	17.48	132.04	88.51
14"	355.6	Sch STD	9.53	81.33	54.57
		Sch 80 (XS)	19.05	158.10	106.13
16"	406.4	Sch STD	9.53	93.27	62.58
		Sch 80 (XS)	21.44	203.53	136.61
18"	457.2	Sch STD	9.53	105.21	70.59
		Sch 80 (XS)	23.83	254.67	170.92
20"	508.0	Sch STD	9.53	117.15	78.60
		Sch 80 (XS)	26.19	311.18	208.85
24"	610.0	Sch STD	9.53	141.10	94.62
		Sch 80 (XS)	30.96	442.08	296.65

Large Diameter API 5L Pipe Dimensions (NPS 26" to 48")

NPS (Inches)	OD (mm)	Wall Thickness (mm)	Schedule Label	Weight ( kg/m )
26"	660.4	9.53	STD	152.95
		12.70	XS	202.93
30"	762.0	9.53	STD	176.84
		12.70	XS	234.78
36"	914.4	9.53	STD	212.67
		12.70	XS	282.55
42"	1066.8	9.53	STD	248.51
		12.70	XS	330.33
48"	1219.2	9.53	STD	284.34
		12.70	XS	378.11