Schedule 40 Pipe—A Comprehensive Guide

Table of Contents

Schedule 40 pipes are used in a wide range of industries, especially those requiring the supply of air, gas, and water in high-temperature environments.

Schedule 40 pipe possesses exceptional properties, such as robust corrosion resistance, and excellent creep deformation resistance, and can be welded with other materials. This type of pipe is also widely used in construction projects, and its diameter, strength, and reactivity make it a reliable choice.

Schedule 40 Pipe Specifications

Schedule 40 has high corrosion resistance, but the wall thickness is thin. It is recommended to select the preset pipe according to the customer’s specified pressure application requirements. The change in pressure will affect these pipes extensively.

Here, 1 1/2 schedule 40 pipe wall thickness is 0.1454 inches, 4 inch schedule 40 pipe wall thickness is 0.2374 inches. The bearing capacity of each variant changed from low to medium.

At PandaPipe, we can cut and supply Schedule 40 steel pipe of any length you need.

 

Schedule 40 Pipe

Schedule 40 Steel Pipe Dimensions, Wall Thickness, etc,...

How thick is 6 schedule 40 pipe? And what is the Pressure rating of 2 inch schedule 40 pipe?

Use this table to help you quickly find the required NPS, ID, OD, Wall Thickness, Weight, and Maximum Pressure of Schedule 40 Steel Pipe.

Manufactured according to ASME B36.10 standard.

All weights and dimensions are nominal.

Nominal Pipe Size (NPS) (inches)

Inside Diameter (OD) (inches)

Outside Diameter (OD) (inches)

Wall Thickness (inches)

Weight (lb/ft)

Maximum Pressure (PSI)

1/8″

0.269

0.405

0.068

0.24

810

1/4

0.364

0.540

0.088

0.42

780

3/8

0.493

0.675

0.091

0.57

620

1/2

0.622

0.840

0.109

0.85

600

3/4

0.824

1.050

0.113

1.13

480

1

1.049

1.315

0.133

1.68

450

1 1/4

1.380

1.660

0.140

2.27

370

1 1/2

1.610

1.900

0.145

2.72

330

2

2.067

2.375

0.154

3.65

280

2 1/2

2.469

2.875

0.203

5.79

300

3

3.068

3.500

0.216

7.58

260

3 1/2

3.548

4.000

0.226

9.11

240

4

4.029

4.500

0.237

10.79

220

5

5.047

5.563

0.258

14.62

190

6

6.065

6.625

0.280

18.97

180

8

7.981

8.625

0.322

28.55

160

10

10.020

10.750

0.365

40.48

140

12

11.938

12.750

0.406

53.52

130

14

13.126

14.000

0.437

54.57

130

16

15.000

16.000

0.500

82.77

130

18

16.876

18.000

0.562

104.67

130

20

18.814

20.000

0.593

123.11

120

24

22.626

24.000

0.687

171.29

120

1 in (inch) = 25.4 mm

1 psi (lb/in2) = 6894.8 Pa (N/m2) = 6.895 * 10-2 bar

Schedule 40 Pipe Chemical Composition

Due to different materials and different processing methods, the chemical composition of the obtained steel pipe surface will also be different.

Schedule 40 steel pipe is mainly composed of low-carbon steel, generally A53 steel pipe. Since this material is prone to cracking during welding and leads to serious consequences, a series of studies have been conducted on it to determine how to make it in the best condition.

  • Nickel (Ni)– 0.4% (max)
  • Chromium (Cr)– 0.4% (max)
  • Molybdenum (Mo)– 0.15% (max)
  • Manganese (Mn)– 0.95% (max)
  • Vanadium(V)– 0.08% (max)
  • Phosphorous (P)– 0.05% (max)
  • Sulfur (S)– 0.045% (max)
  • Copper(Cu) – 0.4% (max)
  • Carbon(C)– 0.25% (max)

Schedule 40 Pipe Pressure Calculation Method

Using mathematical formulas, you can determine if Schedule 40 matches your specific project needs.

SCH = (P/S)×1000

In this equation, P represents the working pressure in the pipe, and S refers to the pressure level that the material can withstand.

For example, if the planned pressure inside the pipe is 300 psi and the S value is 11,000,

Then the calculation equation is as follows:

(300/11000) × 1000 = 27.3

27.3 is very close to SCH40, so you choose SCH40 is very safe and reliable.

Sch 40 Pipe Conclusion

The price of Schedule 40 steel pipe varies significantly due to several factors such as its length, quality grade and purchase volume. In most cases, you will need to spend more money to purchase these different specifications of tubes.

If you choose to purchase a large number of pipes directly from PandaPipe, a company that provides high-quality manufacturing services, your cost-effectiveness will be greatly improved.

For inquiries or more detailed information about other types of steel pipe products, you can watch the video or contact our account manager directly.

FAQs:

  1. What’s the difference between Schedule 40 and 80?

The biggest difference between Schedule 40 and 80 is wall thickness and inside diameter.

For the same type of NPS Schedule 80 pipe, the wall thickness is heavier than Schedule 40 pipe. Schedule 80 pipe has become stronger due to its increased wall thickness, so that it can withstand greater pressure and heavier loads.

 

Schedule 40

  • Thin wall thickness, 0.154″ nominal wall thickness on 2-inch pipe
  • Can withstand 280 PSI
  • Lower cost
  • Mainly used for residential plumbing and irrigation purposes
  • Usually white

Schedule 80

  • The wall thickness is thicker, and the nominal wall thickness of the 2-inch pipe is 0.218″.
  • Can withstand 400 PSI
  • A bit expensive
  • Mainly used in chemical, and industrial manufacturing
  • Usually grey

   2. What does NPS mean?

NPS dimensions indicate approximate measurements of the pipe’s inner diameter (not outer diameter); When the size of the gauge number is adjusted, it may effect the inside diameter (ID), but the change in the outside diameter (OD) is not limited by this.

In 1927, the American Standards Association decided to replace the iron pipe size (IPS) with the nominal pipe size (NPS). This standard specifies the standards applicable to high, low, or high-temperature pipes.

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