Schedule 80 Black Steel Pipe Dimensions and Thickness Chart

Schedule 80 (SCH80) black steel pipe is a high-strength carbon steel pipe—available in both seamless and welded forms—widely used in industrial sectors and representing a core product within the American piping standard system. Unlike standard SCH40 thin-walled black steel pipe, SCH80 pipe features greater wall thickness, superior pressure-bearing capacity, and enhanced structural stability; it is commonly referred to as "black steel pipe" due to its raw, hot-rolled black finish, which lacks galvanization or other coatings. Manufactured in strict accordance with international standards such as ASME B36.10M, ASTM A53, and ASTM A106, it serves as a key piping material for high-pressure fluid transport, industrial equipment applications, and municipal engineering projects.

Why Choose Seamless Black Steel Pipe Over Welded Pipes?

Feature	Seamless Black Steel Pipe	Welded Steel Pipe
Strength & Durability	Higher due to no weld seams	Weaker at weld joints
Pressure Resistance	Superior	Lower
Corrosion Resistance	Better due to uniform structure	Prone to corrosion at weld seams
Cost	Higher initial cost	More affordable
Ideal Applications	High-pressure industries like oil, gas, and steam	Low to medium-pressure applications

What is the thickness of Schedule 80 black steel pipe?

The wall thickness of Schedule 80 black steel pipe varies depending on the nominal pipe size (NPS). In general, SCH 80 pipe wall thickness ranges from about 0.179 inches (4.55 mm) for smaller sizes to 0.500 inches (12.7 mm) or more for larger diameters.

Pipe Size	Schedule 80 Wall Thickness
1 inch	0.179 in (4.55 mm)
2 inch	0.218 in (5.54 mm)
4 inch	0.337 in (8.56 mm)
6 inch	0.432 in (10.97 mm)

For accurate dimensions, including outside diameter, inside diameter, and weight, refer to the Schedule 80 Pipe Dimensions Chart based on ASME B36.10M standards.

Schedule 80 black steel pipe specifications

Item	Specification
Product Name	Schedule 80 Black Steel Pipe
Material	Carbon Steel
Pipe Type	Seamless / Welded
Standards	ASTM A106, ASTM A53, API 5L
Manufacturing Process	Hot Rolled, Cold Drawn, ERW, Seamless
Schedule	SCH 80
Size Range	1/2" - 24"
Outer Diameter	21.3 mm - 610 mm
Wall Thickness	2.77 mm - 52.37 mm
Length	5.8 m, 6 m, or customized
Surface	Black oxide finish, black painting

Schedule 80 Black Steel Pipe Dimensions and Thickness Chart

The wall thickness of Schedule 80 black steel pipe varies according to nominal pipe size. Larger diameter pipes require thicker walls to maintain pressure resistance.

Nominal Pipe Size: 2.00 inch - Schedule: S/80 - Outside Diameter: 2.375 - Inside Diameter: 1.939 - Wall Thickness: 0.218

NPS (in)	DN (mm)	OD (mm)	OD (in)	Sch 80 WT (mm)	Sch 80 WT (in)	ID (mm)	ID (in)	Sch 80 Weight (kg/m)	Sch 80 (lb/ft)
1/8	6	10.29	0.405	2.41	0.095	7.81	0.307	0.47	0.32
1/4	8	13.72	0.54	3.02	0.119	10.44	0.411	0.8	0.54
3/8	10	17.15	0.675	3.2	0.126	13.85	0.545	1.1	0.74
1/2	15	21.34	0.84	3.73	0.147	17.12	0.674	1.62	1.09
3/4	20	26.67	1.05	3.91	0.154	22.45	0.884	2.2	1.48
1	25	33.4	1.315	4.55	0.179	27.86	1.097	3.24	2.17
1¼	32	42.16	1.66	4.85	0.191	36.62	1.442	4.46	3
1½	40	48.26	1.9	5.08	0.2	42.72	1.682	5.4	3.63
2	50	60.33	2.375	5.54	0.218	54.71	2.154	7.48	5.02
2½	65	73.03	2.875	7.01	0.276	66.93	2.635	11.38	7.66
3	80	88.9	3.5	7.62	0.3	82.8	3.26	15.19	10.25
3½	90	101.6	4	8.08	0.318	93.5	3.681	18.58	12.5
4	100	114.3	4.5	8.56	0.337	108.2	4.26	22.26	14.98
5	125	141.3	5.563	9.53	0.375	134.5	5.295	30.99	20.78
6	150	168.28	6.625	10.97	0.432	161.46	6.357	42.55	28.57
8	200	219.08	8.625	12.7	0.5	211.56	8.329	64.5	43.39
10	250	273.05	10.75	12.7	0.5	264.67	10.42	81.83	54.74
12	300	323.85	12.75	12.7	0.5	314.71	12.39	97.54	65.42
14	350	355.6	14	12.7	0.5	342.9	13.5	107.54	72.09

Looking for a Reliable Schedule 80 Black Steel Pipe Manufacturer?

BAOWI Steel is a leading manufacturer of Schedule 80 black steel pipes, known for delivering high-quality, durable, and precision-engineered pipes that meet stringent ASTM and API standards. Our Schedule 80 pipes feature thicker walls for superior pressure resistance, seamless construction for enhanced strength, and a black oxide coating that provides excellent corrosion protection. Serving industries such as oil and gas, construction, and mechanical systems, BAOWI Steel offers customizable sizes, fast delivery, and competitive pricing to ensure your project’s success. Choose BAOWI Steel for reliable Schedule 80 black steel pipes built to perform under the toughest conditions.