Schedule 80 Carbon Steel Pipe

Schedule 80 Carbon Steel Pipe is made up of carbon steel materials. The carbon steels can vary in composition based on the grades. The strengths and the toughness vary. To have an international and equal identification of the pressure capacities of the pipes, the schedule scale is used. The Schedule 80 Carbon Steel Pipe means that it has schedule 80 characteristics. There are schedules 5 to 160. 5 is the least pressure capable and 160 is the most pressure capable.

So the Schedule 80 Pipe Dimensions would be in half way through the spectrum. The nominal bore sizes range from 1/8 inches through 6 inches and the internal and external diameters vary. This in turn affects the wall thickness to vary from 0.095mm to 0.432mm. So the Schedule 80 Pipe Pressure Rating depends on all of these factors; the wall thickness, the diameter and the material grade. The stronger materials don’t need to have thicker walls to be in schedule 80. The Schedule 80 Pipe Thickness In Mm ranges only from 0.095mm to 0.432. The applications of the carbon steels pipes are in the less corrosive, high toughness and high wear and tear applications. The Schedule 80 Pipe Weight differs based on the grade, wall thickness, diameter and length of the pipe. Please contact us for more information and pricings.

Pipe Sch 80 Chart, Dimensions, Weight And Pipe Wall Thickness

Nominal size [inches]	Outside diameter [inches]	Outside diameter [mm]	Wall thickness [inches]	Wall thickness [mm]	Weight [lb/ft]	Weight [kg/m]
1/8" DN6	0.405	10.3	0.095	2.41	0.31	0.47
1/4" DN8	0.54	13.7	0.119	3.02	0.54	0.8
3/8" DN10	0.68	17.1	0.126	3.2	0.74	1.1
1/2" DN15	0.84	21.3	0.147	3.73	1.09	1.62
3/4" DN20	1.05	26.7	0.154	3.91	1.47	2.2
1" DN25	1.315	33.4	0.179	4.55	2.17	3.24
1 1/4" DN32	1.66	42.2	0.191	4.85	3	4.47
1 1/2" DN40	1.9	48.3	0.2	5.08	3.63	5.41
2" DN50	2.375	60.3	0.218	5.54	5.02	7.48
2 1/2" DN65	2.875	73	0.276	7.01	7.66	11.41
3" DN80	3.5	88.9	0.3	7.62	10.25	15.27
3 1/2" DN90	4	101.6	0.318	8.08	12.5	18.63
4" DN100	4.5	114.3	0.337	8.56	14.98	22.32
5" DN125	5.563	141.3	0.375	9.53	20.78	30.97
6" DN150	6.625	168.3	0.432	10.97	28.57	42.56
8" DN200	8.625	219.1	0.5	12.7	43.39	64.64
10" DN250	10.75	273	0.594	15.09	64.43	96.01
12" DN300	12.75	323.8	0.688	17.48	88.63	132.08
14" DN350	14	355.6	0.75	19.05	106.13	158.1
16" DN400	16	406.4	0.844	21.44	136.61	203.53
18" DN450	18	457	0.938	23.83	170.92	254.55
20" DN500	20	508	1.031	26.19	208.87	311.17
24" DN600	24	610	1.125	30.96	296.58	442.08

Why you need to know SCH 80 and its importance:

In construction, the numerical requirements have always been high. Because the accuracy of the numerical values has a great impact on the success of the project. Especially in foundation construction, the stability of the building may be problematic due to a numerical deviation, and it may collapse or tilt without knowing when. Therefore, construction workers must pay attention to the numerical values and be cautious. Next, let me introduce to you the SCH 80, which has been discussed a lot recently.

SCH 80 represents the wall thickness grade of the American standard seamless steel pipe. The wall thickness corresponding to different numbers will also be different. In the industry, this method is often used to replace numerical values, making it easier for everyone to record and use. When designing for some constructions, such accurate values are needed to enable the design to be successfully constructed. If the values are inaccurate, there may be a large gap and lead to failure.

In addition to SCH, which represents the wall thickness of American standard steel pipes, there are also other pronouns such as DN and NB that describe the diameter of steel pipes. DN represents the nominal diameter of the steel pipe in mm, and NB represents the British standard in imperial units.

We will use different ways to express it for different application situations.

SCH 80 means XS thickened pipe with pressure wall thickness less than DN200mm.
The method of expressing wall thickness by the inner diameter of carbon steel reducers stipulated by MSS and ANSI in the United States divides the wall thickness of pipes into three types:

1. Standard weight pipe is represented by STD, which is a carbon steel reducer with an inner diameter <DN250mm. Sch40 is an STD pipe.
2. The thickened pipe is represented by XS, which is a carbon steel reducer with an inner diameter <DN200mm. Sch80 is an XS pipe.
3. Extra thick pipes are represented by XXS, which are carbon steel reducers with an inner diameter <DN250mm. Sch120 is an XS pipe.

FAQ:

1. How thick is schedule 80 pipe?

To determine the exact thickness of Schedule 80 pipe, you must provide its nominal size (NPS) or outside diameter (OD). For example, if you're asking about "2-inch Schedule 80 pipe," referring to the table above, its wall thickness is 5.54mm. For the same NPS size (e.g., 2"), whether it's Schedule 40, Schedule 80, or Schedule 160, the outside diameter (OD) remains constant (60.3mm). Increasing wall thickness means a decrease in the inside diameter (ID).

2. How much does schedule 80 pipe weigh?

To determine the exact weight of Schedule 80 pipe, you must provide its nominal size (NPS), material, and length.
For example: "I'd like to purchase a batch of 10 3-inch Schedule 80 carbon steel pipes in 6-meter lengths. What is the approximate total weight?" ”

Method 1:
From the table above, we know that 3" SCH 80 pipe weighs approximately 15.27 kg/m per meter.
Weight per pipe: 15.27 kg/m × 6 meters = 91.62 kg/pipe.
Total weight: 91.62 kg/pipe × 10 pipes = 916.2 kg.

Method 2:
Weight per meter (kg/m) = [Outer diameter (mm) - Wall thickness (mm)] × Wall thickness (mm) × 0.02466
(Note: 0.02466 is a factor calculated based on the density of carbon steel)

Calculate the weight of 2" SCH 80 pipe:
(60.3 - 5.54) × 5.54 × 0.02466 ≈ 7.47 kg/m

The most accurate method is to contact the supplier directly and provide the standard number (such as ASTM A53) to ensure consistent material quality. The weights in the table above are for carbon steel. Weight also varies depending on the material:
Stainless steel pipe (such as 304 and 316): Density is approximately 7.93 g/cm³, making it approximately 1-2% heavier than carbon steel pipe.
Alloy steel pipe (such as P11 and P22): Density is similar to carbon steel, and weight is almost identical.

3. What is schedule 80 pipe rated for pressure?

The pressure rating of Schedule 80 (SCH 80) pipe is not a fixed value; it depends on three key factors: pipe size, material, and temperature.

Due to its thicker wall thickness, Schedule 80 pipe has a higher pressure rating than Schedule 40 pipe. However, the specific pressure rating varies significantly depending on the pipe material (e.g., PVC, CPVC, or steel), nominal size, and operating temperature. At room temperature, the pressure rating of carbon steel SCH 80 pipe ranges from approximately 2,000 psi to 6,000 psi (14 to 40 MPa). Smaller diameter pipes can withstand higher pressures, and the pressure rating decreases with increasing temperature.

Note: Wall thicknesses and pressure ratings vary slightly across different national standards (e.g., American Standard ASME, German Standard DIN, and Chinese Standard GB). They should not be mixed. Click here to learn more about the Pressure Rating Chart for Schedule 80 Carbon Steel and Alloy Steel Seamless Pipe.

4. Where is Schedule 80 pipe used?

Due to its thicker wall thickness, Schedule 80 pipe is primarily used for:
a. Higher-pressure fluid transport systems.
b. Applications requiring higher mechanical strength (e.g., environments subject to impact and abrasion).
c. Chemical, petroleum, and power industries.

5. Can Schedule 80 pipe be threaded?

Schedule 80 (SCH 80) pipe can definitely be threaded. Because its wall thickness is thicker than SCH 40, it actually provides more material for threading, resulting in a deeper, stronger, and more pressure-resistant threaded connection. It can even be a preferred choice in certain high-pressure applications.

Extended information:

Domestic carbon steel reducers comply with American pipe standards: Sch5s, Sch10s, Sch10, Sch20, Sch30, Sch40s, STD, Sch40, Sch60, Sch80s, XS; Sch80, SCH100, Sch120, Sch140, Sch160, XXS; among them the most commonly used ones are two types: STD and XS.

The internationally accepted pipe flange standards can be summarized into two different and non-interchangeable pipe flange systems: one is the European pipe flange system represented by Germany; the other is the American pipe flange system represented by the United States. 

Go here for more about "Schedule 40 vs Schedule 80 pipe"