Pipe Schedule Chart

Pipe Chart Schedule

A Comprehensive Guide to Pipe Sizes, Schedules, and Dimensions

At Tube Aligen Pro, Our mission to provide accurate and updated information. The Pipe Schedule Chart is an indispensable tool in industries ranging from plumbing to the oil and gas industry.

It standardizes pipe dimensions, ensuring compatibility, safety, and efficiency. This guide explores the fundamentals of pipe schedules, steel pipe dimensions, and how to interpret chart for optimal project outcomes.

pipe schedule chart

What is Pipe chart schedule

sch pipe chart

A Pipe Schedule Chart defines the relationship between Nominal Pipe Size (NPS), outer diameter (OD), and wall thickness. This pipe size charts categorize pipes into schedules (e.g., Sch 40, Sch 80) to indicate their pressure-handling capabilities and applications.

There are two Commonly used standers in USA

ANSI (American National Standards Institute)


ANSI is a private nonprofit organization that oversees the development of voluntary consensus standards for products, services, processes, and systems in the United States.

ASME (American Society of Mechanical Engineers)


ASME is a professional association focused on mechanical engineering and multidisciplinary technical fields.

Key Components of a Piping Schedule Chart

Schedule pipe

This chart cover:

  • Schedule 10 Pipe Dimensions
  • Schedule 40 Pipe Dimensions
  • Schedule 80 Pipe Dimensions
  • Schedule 160 Pipe Dimensions

Derived from the formula Schedule=1000×(P/S​), where P is pressure and S is allowable stress.

Nominal Pipe Size (NPS): A standardized labeling system for pipe diameters. For example, a “2-inch pipe” refers to its NPS, not its exact dimensions.

Outer Diameter (OD):

Measured in millimeters or inches, OD remains constant for smaller pipes (NPS ≤ 12) but aligns with NPS for larger sizes (NPS ≥ 14).

Wall Thickness:

Determines strength and pressure resistance. For instance, Sch 40 pipe thickness is thinner than sch 80 pipe thickness, making the latter suitable for high-pressure systems.

Pipe Schedule Chart – ANSI / ASME

Pipe Size OD ID Schedules Wall Est. LBS per Ft
1/8″ 0.405 0.307 10, 10S 0.049 0.1863
0.269 40, STD, 40S 0.068 0.2447
0.215 80, XS, 80S 0.095 0.3145
1/4″ 0.54 0.41 10, 10S 0.065 0.3297
0.364 40, STD, 40S 0.088 0.4248
0.302 80, XS, 80S 0.119 0.5351
3/8″ 0.675 0.545 10, 10S 0.065 0.4235
0.493 40, STD, 40S 0.091 0.5676
0.423 80, XS, 80S 0.126 0.7388
1/2″ 0.84 0.674 10, 10S 0.083 0.671
0.622 40, STD, 40S 0.109 0.851
0.546 80, XS, 80S 0.147 1.088
0.466 160 0.187 1.304
0.252 XX 0.294 1.714
3/4″ 1.05 0.884 10, 10S 0.083 0.8572
0.824 40, STD, 40S 0.113 1.131
0.742 80, XS, 80S 0.154 1.474
0.614 160 0.218 1.937
0.434 XX 0.308 2.441
1″ 1.315 1.097 10, 10S 0.109 1.404
1.049 40, STD, 40S 0.133 1.679
0.957 80, XS, 80S 0.179 2.172
0.815 160 0.25 2.844
0.599 XX 0.358 3.659
1 1/4″ 1.66 1.442 10, 10S 0.109 1.806
1.38 40, STD, 40S 0.14 2.273
1.278 80, XS, 80S 0.191 2.997
1.16 160 0.25 3.765
0.896 XX 0.382 5.214
1 1/2″ 1.9 1.682 10, 10S 0.109 2.085
1.61 40, STD, 40S 0.145 2.718
1.5 80, XS, 80S 0.2 3.631
1.337 160 0.281 4.859
1.1 XX 0.4 6.408
2″ 2.375 2.157 10, 10S 0.109 2.638
2.067 40, STD, 40S 0.154 3.853
1.939 80, XS, 80S 0.218 5.022
1.687 160 0.344 7.462
1.503 XX 0.436 9.029
2 1/2″ 2.875 2.635 10, 10S 0.12 3.531
2.469 40, STD, 40S 0.203 5.793
2.323 80, XS, 80S 0.276 7.651
2.125 160 0.375 10.01
1.771 XX 0.552 13.7
3″ 3.5 3.26 10, 10S 0.12 4.332
3.068 40, STD, 40S 0.216 7.576
2.9 80, XS, 80S 0.3 10.25
2.624 160 0.438 14.32
2.3 XX 0.6 18.58
3 1/2″ 4.000 3.760 10, 10S 0.120 4.937
3.548 40, STD, 40S 0.226 9.109
3.364 80, XS, 80S 0.318 12.51
2.728 XX 0.636 22.85
4″ 4.5 4.26 10, 10S 0.12 5.613
4.026 40, STD, 40S 0.237 10.79
3.826 80, XS, 80S 0.337 14.98
3.624 120 0.438 19
3.438 160 0.531 22.51
3.152 XX 0.674 27.54
4 1/2″ 5 4.506 STD, 40S 0.247 12.54
4.29 XS, 80S 0.355 17.61
5″ 5.563 5.295 10, 10S 0.134 7.77
5.047 40, STD, 40S 0.258 14.62
4.813 80, XS, 80S 0.375 20.78
4.563 120 0.5 27.04
4.313 160 0.625 32.96
4.063 XX 0.75 38.55
6″ 6.625 6.357 10, 10S 0.134 9.29
6.065 40, STD, 40S 0.28 18.97
5.761 80, XS, 80S 0.432 28.57
5.501 120 0.562 35.39
5.189 160 0.719 43.35
4.897 XX 0.864 53.16
8″ 8.625 8.329 10, 10S 0.148 13.40
8.125 20 0.250 22.36
8.071 30 0.277 24.70
7.981 40, STD, 40S 0.322 28.55
7.813 60 0.406 35.64
7.625 80, XS, 80S 0.500 43.39
7.439 100 0.594 50.95
7.189 120 0.719 61.71
7.001 140 0.812 67.76
6.813 160 0.906 74.79
6.875 XX 0.875 72.42
10″ 10.75 10.42 10, 10S 0.165 18.65
10.25 20 0.250 28.04
10.136 30 0.307 34.24
10.02 40, STD, 40S 0.365 40.48
9.75 60, XS, 80S 0.500 54.74
9.564 80 0.594 64.43
9.314 100 0.719 77.03
9.064 120 0.844 82.29
8.75 140, XX 1.000 104.1
8.5 160 1.125 115.6
12″ 12.75 12.39 10, 10S 0.180 24.16
12.25 20 0.250 33.38
12.09 30 0.330 43.77
12.00 STD, 40S 0.375 49.56
11.938 40 0.406 53.52
11.75 XS, 80S 0.500 65.42
11.626 60 0.562 73.15
11.376 80 0.688 88.63
11.064 100 0.844 107.9
10.75 120, XX 1.000 125.5
10.50 140 1.125 136.7
10.126 160 1.312 150.3
14″ 14.000 13.624 10S 0.188 27.73
13.500 10 0.250 36.71
13.375 20 0.312 45.61
13.250 30, STD, 40S 0.375 54.57
13.124 40 0.438 63.44
13.000 XS, 80S 0.500 72.09
12.814 60 0.594 85.05
12.500 80 0.750 106.1
12.124 100 0.938 130.9
11.814 120 1.09 150.8
11.500 140 1.250 170.2
11.188 160 1.406 189.1
16″ 16.000 15.624 10S 0.188 31.75
15.500 10 0.250 42.05
15.375 20 0.312 52.27
15.250 30, STD, 40S 0.375 62.58
15.000 40, XS, 80S 0.500 82.77
14.688 60 0.656 107.5
14.314 80 0.844 136.6
13.938 100 1.031 164.8
13.564 120 1.220 192.4
13.124 140 1.438 223.6
12.814 160 1.594 245.3
18″ 18.000 17.624 10S 0.188 35.76
17.500 10 0.250 47.99
17.375 20 0.312 58.94
17.250 STD, 40S 0.375 70.59
17.124 30 0.438 82.15
17.000 XS, 80S 0.500 93.45
16.876 40 0.562 104.7
16.500 60 0.750 138.2
16.126 80 0.938 170.9
15.688 100 1.156 208.0
15.250 120 1.380 244.10
14.876 140 1.562 274.20
14.438 160 1.781 308.5
20″ 20.000 19.564 10S 0.218 48.05
19.500 10 0.250 52.73
19.250 20, STD, 40S 0.375 78.6
19.000 30, XS, 80S 0.500 104.1
18.812 40 0.594 123.1
18.376 60 0.812 155.4
17.938 80 1.031 208.9
17.438 100 1.281 256.1
17.000 120 1.500 296.4
16.500 140 1.750 341.1
16.064 160 1.969 379.2
24″ 24.000 23.500 10, 10S 0.250 63.41
23.250 20, STD, 40S 0.375 96.42
23.000 XS, 80S 0.500 125.5
22.876 30 0.562 140.7
22.626 40 0.688 171.3
22.064 60 0.969 238.4
21.564 80 1.219 296.8
20.938 100 1.531 357.4
20.376 120 1.812 429.4
19.876 140 2.062 483.1
19.314 160 2.344 542.1
30″ 30.000 29.376 10, 10S 0.312 98.93
29.250 STD, 40S 0.375 118.65
29.000 20, XS, 80S 0.500 157.53
28.750 30 0.625 196.06
36″ 36.000 35.376 10 0.312 118.92
35.250 STD, 40S 0.375 142.68
35.000 XS, 80S 0.500 189.57
34.750 30 0.625 235.13
48″ 48.000 47.250 STD, 40S 0.375 190.74
47.000 XS, 80S 0.500 253.65
Download PDF

Nominal Pipe Size

This Diagram explain difference in measuring Nominal Pipe Size (N.P.S.) 14″ and Above O.D. Values are Equal (O.D. = N.P.S.)

For Nominal Pipe Size (N.P.S) 1/8″ to 12″ the N.P.S. and O.D. Values are Different (O.D. >N.P.S. >I.D)

Nominal Pipe Size Dimension Interpretation

Comprehensive Guide to Pipe Schedule Chart

An important tool in the piping, plumbing, and industrial engineering world is the pipe schedule chart. This standardized data is important for professionals who are inclined to select the most appropriate pipes for their application. From calculating pipe wall thickness to working with steel pipes and comprehending nominal pipe size (NPS), this guide will provide more light on all you need to know.

What Is a Pipe Schedule Chart?

Tube schedule chart show the relationship between nominal pipe size (NPS), outer diameter (OD), and wall thickness. These pipe schedule chart allow users to identify the essentials like pipe schedule which governs the strength, and durability of the pipe. Standardization in pipe size chart ensures uniformity in the industries, hence, making them the most valuable for engineers, architects, and contractors.

Understanding the Piping Schedule Chart

The piping schedule chart categorizes pipes based on their NPS and wall thickness. It is difficult to ensure that the pipe can withstand the required pressure. Below is an example of what a typical pipe size chart includes:

  • NPS (Nominal Pipe Size): Defines the approximate diameter of the pipe.
  • Outer Diameter (OD): The external measurement of the pipe, often presented in millimeters for global standardization
  • Wall Thickness: The thickness of the pipe’s wall, which determines its strength and pressure-handling capacity.

Why Use a Pipe Size Chart?

The pipe size chart makes it easy to refer and select all information at once. Pipe dimension details for steel pipes, wall thickness, and standard pipe sizes in millimeters are included within the compatibility of many systems. Engineers often cross-reference this with the pipe weight calculator to know the load requirements for precise project planning. This would come in handy for oil and gas, construction, and industries in manufacturing.

Schedule 40 VS 80

Steel pipe schedule 40 vs 80 differs mainly in wall thickness and according the pressure rating. Schedule 40 for low-pressure use, while schedule 80 for higher-pressure applications.

Schedule 40 pipe thickness

The thickness varies depending on the pipe’s diameter,

Standard Pipe Sizes in mm

Pipes are categorized not just by NPS but also by their outer diameter and thickness in millimeters. For example:

For a complete piping schedule chart PDF, you can download online resources to keep a handy reference.

Pipe Wall Thickness Chart and Pipe OD Chart in mm

The pipe wall thickness chart complements the pipe OD chart in mm to ensure you clearly understand the specifications for different schedules like Sch 10, Sch 20, and Sch 40. For instance:

  • Sch 40 Pipe Thickness: Known for being a balanced choice for strength and cost.
  • Sch 80: Offers a thicker wall for high-pressure applications.

Applications of the Steel Pipe Size Chart

Steel pipes are widely used in industries due to their durability and resistance to pressure. The steel pipe size chart ensures:

  • Correct fitting for industrial and residential applications.
  • Accurate pressure handling for pipelines.
  • Consistency in manufacturing and design processes.

Benefits of Using the Nominal Pipe Size Chart

  1. Ease of Selection: The NPS pipe chart ensures users can quickly identify the right pipe for their project.
  2. Standardization: Uniform sizing across manufacturers reduces compatibility issues.
  3. Cost Efficiency: Prevents over-specification, saving on unnecessary material costs.

FAQ

A pipe schedule chart is one table describing the thickness of different pipe dimensions. It guides the engineers, plumbers, & industrial manufacturers in selecting the pipes suitable for a particular job: it provides nominal pipe size (NPS), outer diameter (OD), and wall thickness

The schedule of a pipe determines its wall thickness, which directly controls strength and pressure capacity. High schedule numbers indicate thicker pipe walls, making pipes stronger and able to sustain higher pressure.

Pipe schedules are based on a formula:
Schedule Number=1000×PS\text{Schedule Number} = \frac{1000 \times \text{P}}{S}
where:
PP = Internal working pressure (psi)
SS = Allowable stress of the material (psi)

Some of the most frequently used pipe schedules include:
SCH 5, SCH 10, SCH 20 – Thin-walled pipes for low-pressure applications
SCH 40 – Standard thickness, widely used in construction and plumbing
SCH 80 – Thicker walls for higher-pressure systems
SCH 160 & SCH XXS (Double Extra Strong) – Extra thick walls for high-pressure applications

Pipe schedule focuses on wall thickness, while pipe class includes other factors like material, pressure rating, and usage. Pipe classes define where and how a pipe should be used based on industry standards.

Yes, different materials like carbon steel, stainless steel, PVC, and copper have unique wall thicknesses and pressure ratings. A Schedule 40 steel pipe and a Schedule 40 PVC pipe will not have the same exact thickness or strength.

For NPS 1/8″ to 12″, the outer diameter (OD) remains the same, but the inner diameter (ID) changes as the schedule increases.
For NPS 14″ and above, both OD and wall thickness increase with the schedule number

SCH 40 PVC – Standard thickness, mainly used for irrigation, drainage, and residential plumbing.
SCH 80 PVC – Thicker walls for high-pressure systems like industrial and chemical transport.

Consider these factors:
✅ Operating pressure – Higher pressure needs a thicker pipe.
✅ Fluid type – Corrosive or hot fluids may need a special material.
✅ Installation environment – Underground, marine, or high-temperature areas require specific pipes.
✅ Budget & weight constraints – Thicker pipes are more expensive and heavier.

You can check:
📌 ASME B36.10 (for carbon steel)
📌 ASME B36.19 (for stainless steel)
📌 Manufacturer websites and engineering handbooks

Using the incorrect schedule can cause:
⚠ Leaks or failure – If the pipe is too thin for the pressure.
⚠ Extra costs – If you use a pipe thicker than needed.
⚠ Compatibility issues – If the fittings don’t match the pipe thickness..

Conclusion

A pipe schedule chart is a crucial tool for selecting the correct pipes based on nominal pipe size, wall thickness, and outer diameter. Whether you’re working on a complex industrial project or a simple home renovation, referencing a sch pipe chart ensures accuracy and reliability. For a detailed guide, consider downloading a piping schedule chart PDF for quick and easy access.

By understanding the basics of pipe size, steel pipe dimensions, and standard pipe sizes in mm, you’ll be better equipped to choose the right materials for your needs.

Calculating pipe size and weight

Pipe Weight Calculator – Imperial & Metric Units

Calculate precise pipe weights for steel, PVC, copper, and more! Supports inches/mm, lbs/kg, and material density inputs. Ideal for shipping costs, construction projects, and material requirements planning. Instant unit conversions + ASME/ANSI/ISO standards compliance.

under standing Pipe Standard Sizes in mm

Understand Standard pipe sizes in millimeters (mm)

Standard pipe sizes are referred to in (mm) under nominal bore, DN15 to DN600, where DN implies nominal diameter. This standardization is meant for plumbing, HVAC, and industrial systems. Outside diameters and wall thicknesses depend on the schedule, which defines the pipe’s pressure rating and its strength, for example, Sch. 40, Sch. 80.

industrial chart

Utilize our charts for industries like oil, gas, plumbing, and construction applications.

Optimize efficiency in oil, gas, plumbing, and construction industries with our precision-engineered charts. Designed for project planning, maintenance, and installations, they deliver clear, reliable data to simplify complex workflows and decision-making.

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