Difference Between Black and Galvanized Steel Pipes

Black and galvanised steel pipes are two types of steel pipes that are extensively used in the construction, plumbing, and manufacturing industries. While they may appear to be the same, there are significant differences between these two types of pipes.

Black pipes are a type of steel pipe that is commonly used in industrial settings to transfer gas, oil, or steam. Galvanised pipe is zinc-coated to help prevent corrosion.

Read this article to find out more about Black Pipe and Galvanized Pipe and how they are different from each other.

What is Black Pipes?

Black pipes are a type of steel pipe that is commonly used in industrial settings to transfer gas, oil, or steam. They are also used for regular plumbing and water distribution; however, they are less common than galvanised pipes in these applications.

The strength and longevity of black pipes are two of their advantages. They are designed to endure high pressure and extreme temperatures, making them suitable for use in demanding industrial environments. Black pipes are also impact-resistant and easily cut and threaded to match specific requirements.

However, a disadvantage of black pipes is their corrosiveness. Black pipes can rust and decay over time if not properly protected, compromising their structural integrity and increasing the danger of leaks. Black pipes can be protected from corrosion by coating them with a layer of protective material such as paint, epoxy, or a corrosion-resistant alloy.

What is Galvanized Pipes?

Galvanised pipes are steel pipes that have been zinc-coated to protect them against corrosion. Galvanization involves immersing the steel pipe in a bath of molten zinc, which creates a protective layer on the pipe's surface.

Galvanised pipes' zinc coating serves as a barrier against moisture, chemicals, and other corrosive substances that may cause the steel to rust and weaken over time. Galvanised pipes are therefore more resilient and long-lasting than uncoated pipes, especially in applications where they may be exposed to moisture or severe environments.

One advantage of galvanised pipes is their corrosion resistance. They are resistant to rusting and weakening when exposed to moisture, chemicals, and other corrosive substances, making them perfect for use in plumbing systems and outdoor applications. Galvanised pipes are also reasonably priced and simple to work with, making them a popular choice for construction projects.

However, galvanised pipes can clog and accumulate mineral deposits over time, reducing the flow of water and other fluids through the pipes. This is particularly problematic in plumbing systems, where clogged pipes can cause low water pressure and other issues.

Galvanised pipes are often used in plumbing systems, especially in older residences where they were likely installed years ago. They're also used outdoors in things like fencing, irrigation systems, and gas pipelines.

Difference between Black Pipes and Galvanized Pipes

The following table highlights the major differences between Black Pipes and Galvanized Pipes −


Black Pipes

Galvanized Pipes



Coated with a layer of zinc

Corrosion resistance

Less resistant to corrosion

More resistant to corrosion


Prone to rusting if not protected

Durable and long-lasting


Low Cost

More Cost


Dark, rough surface

Shiny, smooth surface

Common uses

Gas lines, oil lines, steam lines, construction scaffolding, and exhaust systems

Plumbing systems, outdoor applications, gas pipelines, irrigation systems, fencing


In conclusion, black and galvanised steel pipes are two different types of steel pipes that perform different purposes in various industries. Black pipes are uncoated and are typically used for gas lines, oil lines, and steam lines, whereas galvanised pipes are zinc-coated and are commonly used for plumbing.

The decision between black and galvanised pipes will depend on the application and project requirements. Understanding the differences between these two types of pipes is important for ensuring the pipe system's best performance and longevity.

Updated on: 15-May-2023


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