Standard steel pipe size charts

The pipes are one of the most important parts of any renovation, building, or construction project. But to a newbie, they can be quite puzzling to wrap your head around. That’s why we bring you all the types of standard steel pipe size charts and the basic terminology to know before you get started.

Basic terminology

Let’s get right down to the basics. Here are all the terms you need to know:

steel pipe, 3-inch OD
  1. Nominal size: NPS is the standard for measuring sizes. Like the metric system, a measurement system is also crucial for pipes. NPS is used in North America. NPS number is just a rough idea of the diameter of the pipe. But above NPS 14, it starts to match the outside diameter exactly.
  2. Stainless steel: With stainless steel, the word S is put at the end of the schedule. For instance, schedule 40S.
  3. Schedule: The schedule measures the thickness of the wall. The thickness determines the weight as well as the interior dimension. The thicker it is, the more pressure it can withstand from the inside. For instance, thickness will determine whether your water pipes will suffer from water hammer. The schedule is calculated in the following way:

Schedule = 1000 (P/S)

Here P stands for the internal service pressure of the pipe, and S stands for the Ultimate stress of pipe material.

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What are some uses of steel pipes?

They have found use in so many varied fields of construction. Here is a brief look at all of them:

1-inch steel pipes
  1. Ships

Ships have complicated pressure and boiler systems as well as superheaters. Only steel can withstand the high power pressure needed to bear plenty of shocks, vibrations, extreme heat, and cold conditions.

  1. Construction

Whether residential, commercial, or office space, one can’t go without using them in building construction. It is the top choice due to its resistance to rust and corrosion. This property makes it perfect to be used in the water systems, gas pipes, or sewer pipes that are put in any building.

  1. Agriculture

Agriculture requires plenty of durable as well as water-resistant material. Steel pipes are perfect for tractor engines, grain elevators, drainage systems, and other vents. Since raising crops is a year-round job, it’s important to have materials that promise longevity.

  1. Industry

Whether manufacturing anything from packed goods to automobiles, steel pipes will always be used in the process. Chemical plants, as well as modern architecture, everything you can fathom has these fittings installed.

Types of steel pipes

There are essentially four types of steel, although you may have only heard of one- stainless. Here are all of the types based on composition.

  1. Carbon steel

Steel is the addition of iron to carbon. The carbon composition here also includes a small percentage of manganese, copper, and silicon. It is known to be very strong and long-lasting but also expensive compared to other types. The most common uses for carbon steel piping are:

  • chemical processing
  • foundation building
  • sewage systems
  • oil and gas transportation
  • and almost everywhere where high pressure is involved.
Carbon Steel Pipe

Alloy steel

There are many elements used in the alloy steel composition. These include molybdenum, copper, silicon, nickel, and manganese. The advantage that alloy steel has over other types is ductility. Ductility is how much material can be drawn out or molded without breaking.

Due to this, it is generally drawn out into various pipes. They are mostly used in the energy sector.

  1. Stainless steel

This one everyone is familiar with. Stainless steel is mostly used for its corrosion-resistant properties. You’ll especially find it in places that are frequently in contact with water. The shine also gives it a better appeal compared to other types.

The composition consists of chromium, manganese, nickel, silicon, molybdenum, and oxygen. In the industry, you’ll find stainless steel piping in evaporators, surface condensers, heat exchangers, and automobiles.

  1. Tool steel

This type is softer compared to others. It consists mainly of carbide-forming elements like:

  • vanadium
  • molybdenum
  • cobalt
  • nickel
  • and tungsten.

Tool steel is used in places of literally cutting-edge industries like:

  • injection molding
  • construction of cutters
  • reamers
  • and bits used for machining plastic and wood.

Schedules

Let’s look at the various commonly used schedules, their uses, and their dimensions.

Schedule 10 steel pipe

Schedule 10 has a comparatively low thickness of walls. It is generally used in low-pressure situations. It is mainly used for its high cost-effectiveness.

Schedule 10 has NPS values ranging from 1/2, 3/4, 1 to 36, 42. Depending on the NPS value, the outside diameter ranges between 13.7mm to 1067mm. The thickness varies from 1.73 mm to 17.48mm.

Schedule 20 steel pipe

Carbon steel schedule 20 pipes are used in water lines, seawater desalinization, and the petroleum industry. They work in low pressure and also provide chemical compatibility.

The outside diameter varies between 8.625 inches to 36 inches, while the thickness ranges from 0.250” to 0.5”.

Schedule 40 steel pipe

One of the most commonly used pipes is schedule 40 and schedule 80. Its great performance means it is used in water and gas lines and ornamentation because of its high appeal.

Look at the table below for the full details of the outer diameter, thickness, inner diameter, and weight of schedule 40.

INSIDE DIAMETER (IN)OUTSIDE DIAMETER (IN)WEIGHT (LB/FT)WALL THICKNESS (IN)
1/80.269″0.405″0.240.068″
1/40.364″0.540″0.420.088″
3/80.493″0.675″0.570.091″
1/20.622″0.840″0.850.109″
3/40.824″1.050″1.130.113″
11.049″1.315″1.680.133″
1-1/41.380″1.660″2.270.140″
1-1/21.610″1.900″2.720.145″
22.067″2.375″3.650.154″
2-1/22.469″2.875″5.790.203″
33.068″3.500″7.580.216″
3-1/23.548″4.000″9.110.226″
44.026″4.500″10.790.237″
55.047″5.563″14.620.258″
66.065″6.625″18.970.280″
87.981″8.625″28.550.322″
1010.020″10.750″40.480.365″
1211.938″12.75″53.520.406″
1413.124″14.000″63.500.438″
1615.000″16.000″82.770.500″
1816.876″18.000″104.700.562″
2018.812″20.000″123.100.594″
2422.624″24.000″171.300.688″

It can be used in galvanized form or non-galvanized as well. Galvanized means a coating of zinc is applied to the top. This coating helps resist corrosion and rust even better than steel. Schedule 40 pipes are used for railings, scaffoldings, and fences too.

Stainless steel pipe sizes Schedule 40S

The main difference between schedule 40 and 40S is Unit S which stands for stainless steel. Thus you will notice even for the same Nominal size, the weight of 40S pipes is slightly less. It makes it ideal for places where lightweight but durable materials are needed.

Take a look at the exact dimensions below:

NPSINSIDE DIAMETER (IN)OUTSIDE DIAMETER (IN)WEIGHT (LB/FT)WALL THICKNESS (IN)
1/80.269″0.405″0.250.068″
1/40.364″0.540″0.400.088″
3/80.493″0.675″0.580.091″
1/20.622″0.840″0.870.109″
3/40.824″1.050″1.200.113″
11.049″1.315″1.680.133″
1-1/41.380″1.660″2.270.140″
1-1/21.610″1.900″2.720.145″
22.067″2.375″3.650.154″
2-1/22.469″2.875″5.790.203″
33.068″3.500″7.580.216″
3-1/23.548″4.000″9.110.226″
44.026″4.500″10.790.237″
55.047″5.563″14.620.258″
66.065″6.625″18.970.280″
87.981″8.625″28.550.322″
1010.020″10.750″40.480.365″
1212.000″12.75″49.560.375″
1413.250″14.000″54.570.375″
1615.250″16.000″62.580.375″
1817.250″18.000″70.590.375″
2019.250″20.000″78.600.375″
2423.250″24.000″94.620.375″

Schedule 80 steel pipe

As mentioned below, this is the most commonly used pipe, along with schedule 40. However, these are both more corrosion-resistant as well as more expensive. The higher cost compared to schedule 40 is due to the higher number of materials used in the composition. This type is used mostly when pipes have to be exposed and need more strength than usual.

You’ll find these mostly used in industrial and commercial projects.

Take a look at the Size chart.

INSIDE DIAMETER (IN)OUTSIDE DIAMETER (IN)WEIGHT (LB/FT)WALL THICKNESS (IN)
1/80.215″0.405″0.320.095″
1/40.302″0.540″0.540.119″
3/80.423″0.675″0.740.126″
1/20.546″0.840″1.090.147″
3/40.742″1.050″1.470.154″
10.957″1.315″2.170.179″
1-1/41.278″1.660″3.000.191″
1-1/21.500″1.900″3.630.200″
21.939″2.375″5.020.218″
2-1/22.323″2.875″7.660.276″
32.900″3.500″10.250.300″
3-1/23.364″4.000″12.500.318″
43.826″4.500″14.980.337″
54.813″5.563″20.780.375″
65.761″6.625″28.570.432″
87.625″8.625″43.390.500″
109.562″10.750″64.420.594″
1211.374″12.75″88.630.688″
1412.500″14.000″106.100.750″
1614.312″16.000″136.580.844″
1816.124″18.000″170.870.938″
2017.938″20.000″208.921.031″
2421.562″24.000″296.581.219″

Stainless steel pipe sizes – Schedule the 80S

Schedule 80S refers to steel pipes of the stainless variety. The composition is different than regular carbon steel and is more durable. Take a look at the size chart below for the full dimensions.

NPSINSIDE DIAMETER (IN)OUTSIDE DIAMETER (IN)WEIGHT (LB/FT)WALL THICKNESS (IN)
1/80.215″0.405″0.320.095″
1/40.302″0.540″0.540.119″
3/80.423″0.675″0.740.126″
1/20.546″0.840″1.090.147″
3/40.742″1.050″1.470.154″
10.957″1.315″2.170.179″
1-1/41.278″1.660″3.000.191″
1-1/21.500″1.900″3.630.200″
21.939″2.375″5.020.218″
2-1/22.323″2.875″7.660.276″
32.900″3.500″10.250.300″
3-1/23.364″4.000″12.500.318″
43.826″4.500″14.980.337″
54.813″5.563″20.780.375″
65.761″6.625″28.570.432″
87.625″8.625″43.390.500″
109.750″10.750″54.740.500″
1211.750″12.75″65.420.500″
1413.000″14.000″72.090.500″
1615.000″16.000″82.770.500″
1817.000″18.000″93.450.500″
2019.000″20.000″104.100.500″
2423.000″24.000″125.500.500″

These pipes are great with extreme temperatures and extreme pressure as well. The thickness is visibly more than schedule 40, making it the high-end choice for durable construction.

Schedule 40 vs. 80 steel pipe

The main difference is the thickness of size 80, which is greater, and the smaller inside diameter. The weight of 80 is heavier. However, Sch 40 is used more in construction since it is both strong and cost-effective. For exposed pipes that require tenacity to withstand pressure within and without, schedule 80 is preferred.

Both are used in gas lines and construction, but schedule 40 is used more extensively. In weight, schedule 40 will come out to be lighter. It can be a preferred property for some types of fittings.

schedule 40 round tube steel 20 feet

Galvanized steel

Galvanized means coated with zinc for extra protection from rusting. It is mostly used for outdoor projects like fences, railings, and scaffoldings. Inside, its usage is found in plumbing. Hot dip galvanization consists of placing steel materials in a molten zinc bath.

You’ll mainly find galvanized pipes in:

  • industrial water lines
  • roadside railings
  • oil lines
  • all types of public area barriers
  • fencing
  • and agriculture.

Corrugated steel

Corrugated refers to a series of ridges or grooves that run parallel to each other on the metal layer. It can have numerous finishes based on composition and use. It is the choice of material for:

  • stormwater systems
  • road and home drainage systems
  • sewers
  • underpasses
  • culverts
  • and spillways.

The advantage it offers over regular pipes is that of high compression and pressure. It’s lightweight compared to its concrete counterpart used in drainage. You can also expect it to last 50 to 100 years. It means it’s eco-friendly as you won’t require frequent money, time, and resources to replace the fittings every few years. It’s also much easier to install and de-install these pipes as they merely fit together with clamps and are connected.

How to cut a steel pipe

20' of stainless steel metalbestos pipe

You will need a pipe cutter, a reciprocating saw, or a hacksaw to cut a steel pipe. Here’s how you can cut using a steel pipe cutter.

  • Make a mark where you want to cut.
  • Loosen the bottom screw of the cutter. Place it around on the mark.
  • Now, tighten the screw and make it very snug.
  • Get a pair of pliers and hold the pipe in place with one hand.
  • Now rotate the cutter with the right hand and keep tightening the screw with each rotation.
  • After a couple of minutes of rotating, the pipe should fall apart into two pieces right where the mark was.

Best steel pipe cutters

Heavy duty

Rated as Amazon’s choice for pipe cutters, this is a great heavy-duty all-in-one tube and pipe cutter. It comes in two options of 1″-3″ and 1/8″-2″ blade. It does the job faster and neater than any other. The large handle is ergonomic and makes for quick and easy adjustments. If you replace the rollers with cutting wheels, it quickly becomes a 3-wheel cutter instead of two. What’s not to love?

QWORK
596 Reviews
QWORK
It's great for your heavy-duty work.

Stainless steel cutter

This super-efficient stainless cutter is solid and looks it too. It’s larger than traditional cutters and features six different bearings to deliver a smoother cut. The most special feature is the X-Cel knob, which makes handling the product and making adjustments simpler. The handle is constructed with alloy steel, while the rest is super long-lasting, sturdy aluminum. Ridgid is a brand that promises quality and longevity, so you don’t have to think twice before purchasing.

Sale
RIDGID 29963 
1,352 Reviews
RIDGID 29963 
Have you seen such a perfect review score?

Mini-tube cutter

Here’s something for the professionals who need portability and efficiency together. This pack of 2 mini tube cutters is ideal for plumbers, mechanics, and electricians. The composition is alloy steel of the finest quality. The best part is that it can cut anything from brass, copper, and steel to aluminum and PVC.

In contrast to huge cutters, this one fits nicely in small spaces and does the job well. It’s also very simple to operate and thus doesn’t pose any problems to newbies.

Dreyoo Store
3 Reviews
Dreyoo Store
They're small but great.

How to bend steel pipe

Look at how you can bend tubes at home without a pipe bender.

  1. Make a mark with chalk wherever you want to bend the pipe.
  2. Take a blow torch or even a hairdryer for thinner pipes. Turn it on and hold it to the marked area, and heat it.
  3. After sufficient heating for a couple of minutes, bend the pipe in half with your hands carefully.
schedule 40 steel pipe

Steel pipe manufacturers

The largest manufacturer in the States is Turner Industries Group, LLC. It specializes in carbon and alloy steel for construction. American SpiralWeld and Atkore International come next. The latter also produces electrical wiring along with galvanized metal tubing and conduits.

JSW steel is another well-known brand to watch out for. They are well known for the double-submerged arc-wielding process to filter out impurities and only deliver the most flawless products.

Other top producers include:

  • Benteler
  • Metal-Matic
  • Debra Kuempel
  • and ArcelorMittal.

Price of steel pipe

EMT Steel Pipes

The price depends on the thickness and amount, but we can give you an estimate. A 1/2″ will cost between $1000-$1300 per ton. A 1-inch OD will cost you between $800-$1100 per ton. 2-inch OD will be between $600-$900 per ton. 3-inch OD Pipes will be between $600-$950 per ton. A 4-inch OD and a 6-inch OD pipe will be in the range of $600-$950 per ton. 8-inch OD and 10-inch OD will be $630-$1000 per ton.

FAQ

Let’s take a look at popular questions about this topic.

How strong is a 1-inch galvanized pipe?

Strength can be measured in terms of the pressure that it can withstand. Thus a 1-inch galvanized tube can take between 150 PSI to 500 PSI of pressure.

Can you cut steel pipe with a hacksaw?

Yes, certainly you can. Just make sure that it has smaller teeth. Large teeth are used for wood and won’t work as well with metals.

What gauge should the stove pipe be?

A 24 gauge is fine. But if the stovepipe diameter is larger than 10 inches, you might want to look for something heavier. In that case, you can go for 22 or 20 gauge.

What are the four different kinds of pipe bending?

These four are:
– Compression bending – Simply applies pressure to get desired results. It’s used a lot in electrical conduits.
– Roll bending – Rollers are employed for pipes as well as sheets of steel. Only suitable for thinner pipes.
– Mandrel tube bending – Mandrel is inserted into the tube, and the rotary machine is allowed to do its job. The mandrel avoids any distortion and gives it a nice shape.
– Rotary draw bending – A machine is used to draw out pipes in ways that are not possible by compression.