Are Pipes and Tubes the Same Thing?

May 12, 2025 | Industry News

In the fields of plumbing, construction, and manufacturing, the terms “pipe” and “tube” come up a lot. Most people think that the two terms are used interchangeably, but in reality, they are two different product categories. Knowing the difference between them is important for people working in these fields. In this article, we will help readers understand the difference between pipe and tube, focusing on their characteristics, uses, and the types of fittings used.

Defining Pipes and Tubes

Pipes

Pipes are typically cylindrical, hollow structures used primarily to transport fluids, gases, or solids. They are defined by their diameter and wall thickness, which determine their pressure rating and overall strength. The most common materials for pipes include steel, PVC, and copper. For example, galvanized pipe fittings are used to form good connections to ensure that the system works well and remains intact. To extend the life of the fittings, the surface of the fittings is galvanized to prevent rust and corrosion. Therefore, they are suitable for both indoor and outdoor environments.

Tubes

The tubes themselves are also hollow but are often defined by their outside diameter (OD) and wall thickness. Typically, tubes are made of materials such as stainless steel, aluminum, or plastic. Stainless steel fittings are often used with pipes to form a tight, corrosion-resistant connection, which is essential in industries such as food processing, pharmaceuticals, and chemical manufacturing.

Key Differences Between Pipes and Tubes

1. Dimensions and Standards

Tubes and pipes differ greatly in the way they are measured. The size of a pipe is determined by its nominal diameter, which is not directly related to the actual size. For example, a 2-inch pipe may have an actual diameter of 2.375 inches. Pipes, on the other hand, are measured based on their actual outer diameter, which makes it easier to determine the appropriate size required for a project.

Pipes are mainly used to transport liquids and gases. They are widely used in plumbing, heating, and cooling. In these applications, galvanized pipe fittings play an important role as they provide a tight connection that can withstand extremely high pressures.

Tubes, on the other hand, have a much wider range of applications. They can be used as structural supports, frames, or even as purely aesthetic architectural elements.

3. Material Composition

The use of materials such as carbon steel or PVC to manufacture pipes is largely due to the fact that strength and durability are the main considerations when manufacturing these products. Typically, forged pipe fittings are the pipe fittings used with pipes, which not only provide a secure connection but also withstand high pressure conditions.

The development of stainless steel pipes is due to its many advantages such as corrosion resistance and sanitation. Applications that require corrosion-resistant or hygienic materials use the above pipes. Stainless steel pipe fittings used in conjunction with these pipes are an excellent solution for achieving a secure connection.

Choosing the Right Fittings

When using pipes, choosing the right pipe fittings is key to ensuring system integrity and performance. Here is a brief description of common pipe fitting:

Galvanized Pipe Fittings

Galvanized pipe fittings are available in a wide variety of styles and provide top-notch protection against rust and corrosion. These fittings include elbows, tees, and unions in a variety of shapes that can be used to build complex piping systems. The durability of galvanized fittings makes them suitable for both indoor and outdoor applications.

Forged Pipe Fittings

Forged fittings are usually made of metal that is formed in one piece, so their durability and strength are excellent. They are mainly used in high-pressure applications, such as the oil and gas industry.

Stainless Pipe Fittings

These are critical for any application in which the product must have vastly superior resistance to corrosion, for instance, food, and pharmaceutical industries. The fittings result in the contagion-free situation which is important in food, or even in nutritional drug supply.

Conclusion

To sum up, even though pipes and tubes are so close, actually, they are used in different ways and possess different characteristics. It is carried by pipes the main function of transporting fluids and gases, while the use of tubes goes much beyond that as a structural member and other uses.

You can only guarantee the grace and effectiveness of your systems when you go in for the proper fittings for your pipes or tubes.

Our wide range and supervised choice will allow you to get the product that is the best match for your requirements. Contact us right now to get more information about our products and the ways we can help you!