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Mechanical Properties

Differences between Pipe and Tube

Many pepole are thinking: sometimes we call pipes, sometimes we call them tubes. Both of them are with the same shape. And we are confused what’s pipe and what's tube . More often than not, people guess it has something to do with the quality of the materials, but that’s got nothing to do with it. The difference between a pipe and a tube is how they are measured, and ultimately what they are used for. A pipe is a vessel – a tube is structural. A pipe is measured ID (Inside Diameter) – a tube is measured OD (Outside Diameter).

How they are measured… Pipes are measured ID (inside diameter) because they are vessels. Tubes are measured OD ( outside diameter) because they are structural. Pipes have a consistent ID regardless of wall thickness.

In other words, a 1/2″ high pressure pipe may need a 2″ thick wall, but the ID will still only be 1/2″ even tho the OD is 4.5. Generally speaking, a tube will have a consistent OD and it’s ID will change. Engineers see tubes and pipes with different eyes.

A tube is structural. By having a consistent OD they can vary wall thickness, changing the ID, to increase strength. Because they are consistent OD, they have predictable characteristics. Again, the difference is simple, it’s how they are measured and what their intended uses are.

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Pipe Working Pressure Calculation
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Useful Tools:

Metals weight Calculator
Stainless Steel Weight Calculator
Nickel Alloy Tubing Weight Calculator
Sheet Plate Weight Calculator
Hardness Values Conversion Calculator
Hardness Conversion Calculator
Length Weight Temperature Volume Pressure Conversion
Pipe Working Pressure Calculation
Pressure Conversion Converter Calculator
Gauge Sizes - Wire Sheet Plate Tube
Stainless Steel Pipe Schdule
Nominal Pipe Size
ANSI Pipe Chart

Stainless Steel Tubing and Pipe:

Heat Exchanger Tubes
U Bend Stainless Steel Tubing
Duplex Stainless Steel Pipe
Boiler Tubes, Condenser Tubes
Stainless Steel Seamless Pipes Corrugated Seamless Stainless Steel Pipe Tube
Cold Drawn Bright Annealing Stainless Steel Tubes
Heat resistant Stainless Steel Tubes
Welded Stainless Steel Pipe
Corrosion Resistant Stainless Steel Tube
Corrosion Resistance of Stainless Steel Tubes
Nickel Alloy Seamless Tubes:

UNS N08020 2.4600 Nickel Alloy 20 Seamless Tubing
UNS N02200 2.4066 200 Nickel Alloy Seamless Tubing
UNS N04400 400 Nickel Alloy 2.4360 Nickel Alloy Tubing
UNS N08800 800 Nickel Alloy Seamless Tubes
UNS N08810 800H UNS N08810 Nickel Alloy Seamless Tubes
UNS N08811 800HT Nickel Alloy Seamless Tubes
UNS N08825 825 2.4858 Nickel Alloy Seamless Tubes
UNS N06600 600 2.4816 Nickel Alloy Seamless Tubes
UNS N06625 625 2.4856 Nickel Alloy Seamless Tubes
UNS N10276 C-276 2.4819 Nickel Alloy Seamless Tubing
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