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At Lakshya Steel, we supply high-quality SCH 40 steel pipes known for their reliable strength & wall thickness. Widely used in medium pressure applications & are available in various grades & diameters to suit construction, plumbing, gas distribution & industrial systems. The increased wall thickness with higher schedule numbers ensures better pressure handling & long-term durability. Schedule 40 pipes are referred to as the best choice for corrosion-resistant applications. We manufacture these types of pipe by using premium grades like 304, 316 & 316L. These pipes combine strength, corrosion resistance, and clean finish, making them suitable for structural and fluid handling needs.

As a leading SCH 40 pipe manufacturer and schedule 40 stainless steel pipe manufacturer, Lakshya Steel delivers precision-engineered pipes in custom lengths, finishes & specifications. All our pipes comply with ANSI, ASTM & ASME standards, ensuring performance and reliability across diverse applications.

Choose Lakshya Steel for dependable quality, timely delivery & competitive pricing on all your schedule 40 pipe requirements.

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What is Schedule 40 Pipe?

Schedule 40 pipe is one of the most commonly used pipe standards across industries due to its balance of strength, wall thickness, and cost-effectiveness. When labeled as “Sch 40 pipe,” it typically indicates a pressure-handling capacity of around 40 kg and a standard wall thickness of approximately 4 millimeters.

They are widely used in applications such as air, water, oil, and natural gas transportation. These pipes offer strong resistance to corrosion especially from chloride ions. The lower carbon content in schedule 40 steel pipes makes them easier to weld and minimizes the risk of localized rusting. Made from high-grade stainless steel, including 304, 316 & 316L, stainless schedule 40 pipes are ideal for plumbing, chemical processing, marine use & structural applications. The smooth finish and reliability make sch 40 stainless pipes suitable for clean & sanitary systems. As per ANSI B36.10 standards, several wall thickness schedules are available in types including Sch10, Sch20, Sch30, Sch40, Sch60, Sch80, Sch100, Sch120, Sch140 & Sch160.

Schedule 40 SS pipes are especially preferred for smaller diameter lines such as the 1-inch and offer excellent performance in low to medium-pressure systems. Depending on the pipe size, the weight can vary, typically around 1.68 lbs per foot.

Schedule 40 Pipe Thickness in mm

Get Schedule 40 Pipe Thickness in mm – Trusted Supplier & Exporter of SCH 40 Pipes in API 5L, ASTM A106/A53 Grade B, A333 Gr 6, A335 P22/P11/P9 materials across India.

Metric diameter Inch Out diameter Out diameter point to the thickness
A B ASME STD SCH40 SCH80
8 1/4′ – – – –
10 3/8 – – – –
15 1/2″ 21.3 2.77 2.77 3.73
20 3/4″ 26.7 2.87 2.87 3.91
25 1″ 33.4 3.38 3.38 4.55
32 1.1/4″ 42.2 3.56 3.56 4.85
40 1.1/2″ 48.3 3.68 3.68 5.08
50 2″ 60.3 3.91 3.91 5.54
65 2.1/2″ 73 5.16 5.16 7.01
80 3″ 88.9 5.49 5.49 7.62
90 3.1/2″ 101.6 5.74 5.74 8.08
100 4″ 114.3 6.02 6.02 8.56
125 5″ 141.3 6.55 6.55 9.53
150 6″ 168.3 7.11 7.11 10.97
200 8″ 219.1 8.18 8.18 12.7
250 10″ 273 9.27 9.27 15.09
300 12″ 323.8 9.53 10.31 17.48
350 14″ 355.5 9.53 11.13 19.05
400 16″ 406.4 9.53 12.7 21.44
450 18″ 457.2 9.53 14.27 23.83
500 20″ 508 9.53 15.09 26.19
550 22″ 558.8 9.53 – 28.58
600 24″ 609.6 9.53 17.48 30.96
650 26″ 660.4 9.53 – –
700 28″ 711.2 9.53 – –
750 30″ 762 9.53 – –
800 32″ 812.8 9.53 17.48 –
850 34″ 863.5 9.53 17.48 –
900 36″ 914.4 9.53 19.05 –
950 38″ 965.2 9.53 – –
1000 40″ 1016 9.53 – –
1050 42″ 1066.8 9.53 – –
1100 44″ 1117.6 9.53 – –
1150 46″ 1168.4 9.53 – –
1200 48″ 1219.2 9.53 – –
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Schedule 40 Steel Pipe Weight

The weight of Schedule 40 pipe is different for all sizes & grade materials. These piping systems are used in applications with lower water pressure due to their thinner wall thickness. To select the right size to ensure enough strength & performance as its weight directly impacts its load bearing capacity. To calculate the exact weight use a schedule 40 pipe weight chart which contains lists of wall thickness & corresponding weights for various pipe diameters. Historically, these pipes were categorized as standard weight, extra strong & double Extra Strong & while these terms are outdated, they are still commonly referenced by suppliers.

Manufacturers & suppliers provide Sch 40 pipes in a wide range of materials including Stainless Steel, ASTM A106 Grade B, A53 Gr B, A333 Grade 6, Aluminum, API 5L Gr. B Carbon Steel & GI material.

Schedule 40 Steel Pipe Weight Chart

Accurately calculate the weight of Schedule 40 steel pipes with our comprehensive weight chart – ideal for construction, plumbing, and industrial applications.
Nominal sizes Outside diameter Pipe Wall thickness Weight Chart
inches OD in inches OD in mm inches mm lb/ft kg/m
1/8 0.405 10.3 0.068 1.73 0.24 0.37
1/4 0.540 13.7 0.088 2.24 0.42 0.84
1/2 0.840 21.3 0.109 2.77 0.85 1.27
3/4 1.050 26.7 0.113 2.87 1.13 1.69
1 1.315 33.4 0.133 3.38 1.68 2.50
1 1/4 1.660 42.2 0.140 3.56 2.27 3.39
1 1/2 1.900 48.3 0.145 3.68 2.72 4.05
2 2.375 60.3 0.154 3.91 3.65 5.44
2 1/2 2.875 73.0 0.203 5.16 5.79 8.63
3 3.500 88.9 0.216 5.49 7.58 11.29
3 1/2 4.000 101.6 0.226 5.74 9.11 13.57
4 4.500 114.3 0.237 6.02 10.79 16.07
5 5.563 141.3 0.258 6.55 14.62 21.77
6 6.625 168.3 0.280 7.11 18.97 28.26
8 8.625 219.1 0.322 8.18 28.55 42.55
10 10.750 273.0 0.365 9.27 40.48 60.31
12 12.750 323.8 0.406 10.31 53.52 79.73
14 14 355.6 0.375 11.13 54.57 94.55
16 16 406.4 0.500 12.70 82.77 123.30
18 18 457.0 0.562 14.27 104.67 155.80
20 20 508.0 0.594 15.09 123.11 183.42
24 24 610.0 0.688 17.48 171.29 255.41
32 32 813.0 0.688 17.48 230.08 342.91

Sch 40 Pipe Dimensions

Explore standard Sch 40 pipe dimensions including diameter, wall thickness, and weight – perfect for industrial and commercial piping needs.
Maximum Allowable Pressure (psi) (kPa)
NPS Outside Diameter (OD) Schedule
(in) (in)(mm) 40
1/4 0.54 13.7 7985 55057
3/8 0.675 17.1 6606 45548
1/2 0.84 21.3 6358 43838
3/4 1.05 26.7 5273 36357
1 1.315 33.4 4956 34172
1 1/4 1.66 42.2 4133 28497
1 1/2 1.9 48.3 3739 25780
2 2.375 60.3 3177 21905
2 1/2 2.875 73 3460 23857
3 3.5 88.9 3024 20850
3 1/2 4 102 2769 19092
4 4.5 114 2581 17796
5 5.563 141 2273 15672
6 6.625 168 2071 14280
8 8.625 219 1829 12611
10 10.75 273 1664 11473
12 12.75 324 1560 10756
14 14 356 1533 10570
16 16 406 1531 10556
18 18 457 1530 10549
20 20 508 1455 10032
22 22 559
24 24 610 1405 9687
30 30 762
32 32 813 1054 7267
34 34 864 992 6840
36 36 914 1021 7040
42 42 1067 875 6033

What does NPS (Nominal Pipe Size) stand for?

The NPS size represents the pipe’s approximate inside diameter; if the schedule number on a set size is changed, the inside diameter (ID) but not the outside diameter (OD) is affected (OD). Nominal Pipe Sizing was developed by the American Standard Association to replace the previously employed Iron Pipe Sizing. For high or low pressures and temperature pipes, this North American standard is employed.

NPS OD SCH Wall Thickness  ID
1.000”     1.315”   SCH 40   0.133”     1.049” (approx.)
1.000”   1.315”     SCH 80  0.179”  0.957” (approx.)
The NPS and Sch numbers are used to identify all pipes. The interior diameter is approximated using the schedule number.

Pressure Rating for Schedule 40 Carbon Steel Pipe

Steel Piping diameter od chart, wall thickness, and weight per foot are all available for free.

1 in (inch) = 25.4 mm

1 psi (lb/in2) = 6,894.8 Pa (N/m2) = 6.895×10-2 bar

Based on ASTM A53 – Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless.

Pipe Size 

(in)

 Diameter

(in)

 Nominal Thickness 

(in)

 Transverse Areas

(in2)

 Length of Pipe

(ft per sq. foot of surface)

 Volume

(ft3/ft)

 Weight Number of Threads per inch of Screw
External Internal External Internal Steel External Surface

(ft)

 Internal Surface 

(ft)

 (lb/ft) (kg/m)
1/8 0.405 0.27 0.07 0.13 0.06 0.07 9.43 14.20 0.0004 0.24 0.36 27
¼ 0.540 0.36 0.09 0.23 0.10 0.13 7.07 10.49 0.0007 0.42 0.63 18
3/8 0.675 0.49 0.09 0.36 0.19 0.17 5.66 7.75 0.0013 0.57 0.84 18
½ 0.840 0.62 0.11 0.55 0.30 0.25 4.55 6.14 0.0021 0.85 1.26 14
¾ 1.050 0.82 0.11 0.87 0.53 0.33 3.64 4.64 0.0037 1.13 1.68 14
1 1.315 1.05 0.13 1.36 0.86 0.49 2.90 3.64 0.0060 1.68 2.50 11 ½
1 ¼ 1.660 1.38 0.14 2.16 1.50 0.67 2.30 2.77 0.0104 2.27 3.38 11 ½
1 ½ 1.900 1.61 0.15 2.84 2.04 0.80 2.01 2.37 0.0141 2.72 4.04 11 ½
2 2.375 2.07 0.15 4.43 3.36 1.08 1.61 1.85 0.0233 3.65 5.43 11 ½
2 ½ 2.875 2.47 0.20 6.49 4.79 1.70 1.33 1.55 0.0333 5.79 8.62 8
3 3.500 3.07 0.22 9.62 7.39 2.23 1.09 1.25 0.0513 7.58 11.27 8
3 ½ 4.000 3.55 0.23 12.56 9.89 2.68 0.95 1.08 0.0687 9.11 13.56 8
4 4.500 4.03 0.24 15.90 12.73 3.17 0.85 0.95 0.0884 10.79 16.06 8
5 5.563 5.05 0.26 24.30 20.00 4.30 0.69 0.76 0.1389 14.61 21.74 8
6 6.625 6.07 0.28 34.47 28.89 5.58 0.58 0.63 0.2006 18.97 28.23 8
8 8.625 7.98 0.32 58.42 50.02 8.40 0.44 0.48 0.3552 28.55 42.49 8
10 10.750 10.02 0.37 90.76 78.85 11.90 0.36 0.38 0.5476 40.48 60.24 8
12 12.750 11.94 0.41 127.64 111.90 15.74 0.30 0.32 0.7763 53.60 79.77 8
14 14.000 13.13 0.44 153.94 135.30 18.64 0.27 0.28 0.9354 63.00 93.75 8
16 16.000 15.00 0.50 201.05 176.70 24.35 0.24 0.25 1.2230 78.00 116.08 8
18 18.000 16.88 0.56 254.85 224.00 30.85 0.21 0.23 1.5550 105.00 156.26 8
20 20.000 18.81 0.59 314.15 278.00 36.15 0.19 0.20 1.9260 123.00 183.05 8
24 24.000 22.63 0.69 452.40 402.10 50.30 0.16 0.17 2.7930 171.00 254.48 8

ASTM A53 pipe – also referred to as ASME SA53 pipe – is intended for mechanical and pressure applications. Can be used in steam, water, gas and air lines. Suitable for welding and forming like coiling, bending and flanging.

  • 1 in2 = 645.2 mm2 = 6.452 cm2 = 6.452×10-4 m2
  • 1 ft (foot) = 0.3048 m

Steel Pipe Weight Chart

Steel Pipe Weight Chart<br />

SCH 40 Pipe Schedule Chart

Find detailed information in our SCH 40 pipe schedule chart, showing wall thickness, diameter, and weight for various sizes. Ideal for selecting the right schedule 40 pipe, schedule 40 steel pipe, or SCH 40 stainless pipe.
Pipe Schedule Chart<br />

Schedule 40 Steel Pipe Size Chart

Explore our complete schedule 40 steel pipe size chart to understand pipe dimensions, wall thickness, and OD/ID details. Useful for selecting the right sch 40 pipe or schedule 40 stainless steel pipe for your application.

Steel Pipe -Size, Schedule and Flow Rates

Schedule 40 Pipe Weight

ANSI Sch 40 Weight Chart

Refer to our ANSI sch 40 pipe weight chart to find the accurate weight per meter or foot for various sizes. This chart includes data for schedule 40 steel pipe and sch 40 stainless pipe for precise load planning.

ANSI Sch 40 Weight Chart<br />

Schedule 40 Pipes Pressure Rating

Know the pressure handling capabilities of schedule 40 pipe with our pressure rating guide. Includes data for schedule 40 steel pipe, sch 40 pipe, and sch 40 stainless pipe to ensure safe and efficient use in all environments.

Maximum Allowable Pressure (psi)
(kPa)
NPS Outside Diameter Schedule
(inch) (inch)(mm) 40
1/4 inch 0.54 inch13.7 mm 798555057
3/8 inch 0.675 inch17.1 mm 660645548
1/2 inch 0.84 inch21.3 mm 635843838
3/4 inch 1.05 inch26.7 mm 527336357
1 inch 1.315 inch33.4 mm 495634172
1 1/4 inch 1.66 inch42.2 mm 413328497
1 1/2 inch 1.9 inch48.3 mm 373925780
2 inch 2.375 inch60.3 mm 317721905
2 1/2 inch 2.875 inch73 mm 346023857
3 inch 3.5 inch88.9 mm 302420850
3 1/2 inch 4 inch102 mm 276919092
4 inch 4.5 inch114 mm 258117796
5 inch 5.563 inch141 mm 227315672
6 inch 6.625 inch168 mm 207114280
8 inch 8.625 inch219 mm 182912611
10 inch 10.75 inch273 mm 166411473
12 inch 12.75 inch324 mm 156010756
14 inch 14 inch356 mm 153310570
16 inch 16 inch406 mm 153110556
18 inch 18 inch457 mm 153010549
20 inch 20 inch508 mm 145510032
22 inch 22 inch559 mm
24 inch 24 inch610 mm 14059687
30 inch 30 inch762 mm
32 inch 32 inch813 mm 10547267
34 inch 34 inch864 mm 9926840
36 inch 36 inch914 mm 10217040
42 inch 42 inch1067 mm 8756033

Chemical Composition of Schedule 40 Steel Pipe

Schedule 40 pipe is divided in types based on its nominal wall thickness rather than the grade of the material. It means that the chemical composition of a Schedule 40 pipe can vary. Typically, they are made from low-carbon steel, most commonly A53 grade steel.

The SCH 40 pipe thickness is designed to handle a variety of pressures to use for numerous applications. For instance, seamless weld type S A53 steel pipes may have varying chemical compositions based on the type of weld but they generally follow specific guidelines for elements such as carbon, manganese & others. To determine the specific sch 40 pipe dimensions you need, it is essential to refer to the relevant charts & standards. These will provide detailed information on the thickness & diameter of the pipes ensuring you select the right dimensions for your project requirements. It is crucial for maintaining the integrity & performance of the piping system. 

  • Carbon – 0.25% (max)
  • Manganese – 0.95% (max)
  • Phosphorous – 0.05% (max)
  • Sulfur – 0.045% (max)
  • Copper – 0.4% (max)
  • Nickel – 0.4% (max)
  • Chromium – 0.4% (max)
  • Molybdenum – 0.15% (max)
  • Vanadium – 0.08% (max)

Schedule 40 Pipe Grades

Schedule 40 steel pipe is manufactured by using a variety of grades to meet specific industry needs to generate reliable performance. These schedule 40 pipe grades are defined by their chemical composition & mechanical properties ranging from general construction to high pressure fluid transmission. These are the most widely used schedule 40 steel pipe grades for applications. Made from low carbon steel with elements like manganese, phosphorus & sulfur to offer excellent strength, weldability & durability.

  1. ASTM A53 Grade A & B: These are the most widely used schedule 40 steel pipe grades for applications. Made from low carbon steel with elements like manganese, phosphorus & sulfur to offer excellent strength, weldability & durability.
  2. ASTM A106 Grade B: ASTM A106 Grade B is made from seamless carbon steel. It includes elements such as silicon, chromium & copper to maintain stability under elevated temperatures to use in refineries & power plants.
  3. API 5L Grade B: It is used extensively in the oil and gas sector for transporting petroleum, gas & water. With a strong carbon-manganese base and added elements for durability to ensures reliable fluid handling under pressure.
  4. ASTM A333 Grade 6: Engineered for low-temperature environments, A333 Grade 6 is a sch 40 pipe grade with excellent impact toughness. It contains nickel and chromium for enhanced cold resistance, commonly used in cryogenic systems and arctic pipelines.
  5. ASTM A500 Grade B: This grade is used primarily for structural applications including bridges & buildings. Made from carbon steel with manganese & copper, ASTM A500 Grade B schedule 40 steel pipes are valued for their structural integrity and formability.

Schedule 40 Pipe Applications

Explore the wide applications of Schedule 40 Pipe in plumbing, industrial piping, oil & gas transmission, and structural frameworks. Schedule 40 steel pipe offers strength, durability, and corrosion resistance for high and low-pressure systems in diverse industries.

  • Plumbing & Water Systems: For hot/cold water in various settings.
  • HVAC Systems: Efficiently distribute hot/cold air.
  • Oil & Gas: Crucial for fluid transport in industries.
  • Construction: Support structures like beams & columns.
  • Industrial Processes: Reliable in manufacturing and mining.
  • Fire Protection: Vital for high-temperature resilience in buildings.

Schedule 40 Pipe Price

At Lakshya Steel, we offer high quality Schedule 40 pipes at affordable prices that match industry standards without compromising on quality. The cost of these steel pipes depends on a few factors such as pipe material, size, grade & wall thickness. We ensure timely delivery with customization options. Our team provides quick quotes & expert support to help you choose the right piping solution for your application. Choose Lakshya Steel for reliable supply, excellent service & durable products that meet ASTM, ASME & API standards. Contact us today to get the best estimate for your Schedule 40 pipe requirements.

Frequently Asked Questions

What does Sch 40 mean?

Sch40 simply tells you the strength of a pipe. It means it can handle 40 kg of pressure. You can easily identify it by its thickness of 4.0mm. Pipes of various diameters, pressures, and wall thicknesses fall under Sch40. Check out the Pipes Schedule 40 chart for dimensions, weight, and pipe wall thickness. You can also use the Steel Metal Weight Calculator.

What's the formula for pipe schedule?

To find the pipe schedule, use the formula SCH = 1000(P/S), where P is the service pressure and S is the stress. Both are measured in pounds per square inch (psi), and SCH is short for pipe schedule.

How thick is a SCH 40 pipe?

A Sch40 pipe has a thickness of 4 mm. The “40” in Sch40 means it can withstand 40 kg of pressure. It has a standard thickness of 4 mm. ANSI B36.10 lists wall thickness in ten levels: Sch10, Sch20, Sch30, Sch40, Sch60, Sch80, Sch100, Sch120, Sch140, and Sch160.

Is Schedule 40 PVC or CPVC?

CPVC and PVC may look similar, but they have differences. Both types come with plain end and bell end options, and they are available in Schedule 40 and Schedule 80 thickness. Schedule 40 PVC even has Class 125 fittings. PVC comes in lengths of 10 ft and 20 ft.

What are Schedule 40 and 80 pipes?

Schedule 40 pipes have thinner walls compared to Schedule 80 pipes of the same size. It means that there is less material, possibly resulting in a weaker product. If the integrity of the plumbing is important for your intended use, you might need to consider this when choosing between Schedule 40 & 80.
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