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What is a Steel Pipe of 400 mm Outer Diameter?

Jun 18, 2025

Being well-familiar with the steel pipe regulations is a must in the construction and industrial applications. A steel pipe with a 400 mm outer diameter is one of the general specifications. In this article, we shall reveal what the standard is all about, advise on the uses of such pipes, and make it clear that our galvanized steel pipes can become an indispensable tool in your business.

Interpreting the Dimensions of Steel Pipe

GI steel pipes

What Does 400 mm Outer Diameter Mean?

The outer diameter OD of a steel pipe pipe is the predominant factor in determing the fittings and applications that can be used. A pipe with 400 mm outer diameter is one in which the outside of the pipe through its axis is measured to be 400mm.

Other parameters like wall thickness and inner diameter

It is important to take into account the thickness of a pipe which can be ranged from 0.12 mm to 3.0 mm in our product line. This thickness qualifies as the internal diameter ID of the pipe. For example, in a 400 mm OD pipe with a wall thickness of 10 mm, the inner diameter would be 380 mm. The internal dimension plays a significant role in determining the flow velocity in piping systems.

Applications of 400 mm Steel Pipes

400 mm steel pipes are frequently utilized in different areas. The following are examples of these areas:

Water and Sewage Systems: These pipelines would be used for bigger and waste water very efficient which is a good thing for municipal water supply and waste disposal systems.

Structural Support: The pipes in construction, as the case may be, in the role of the columns and beams may strengthen the buildings, bridges, or other structures and thus are of great help.

Oil and Gas Transportation: Steel pipes are so unyielding that they can be used for the transfer of crude oil, natural gas products.

Industrial Applications: Steel pipes are common elements for manufacturing machinery and even for goods production.

Have any other questions? Welcome to Contact us, we will serve you wholeheartedly!

The Benefits of Using Galvanized Steel Pipes

Such a right choice will benefit you in a myriad of ways:

1. Corrosion Resistance

Zinc-coated steel pipes are rust and corrosion-resistant due to the zinc layer that encapsulates the steel. Corrosion protection is critical for pipes that are exposed to water and the environment. And keeps them reliable while keeping the maintenance cost down to a minimum level.

2. Durability

Our galvanized pipes are made of very good quality materials so they can bear high loads and pressures.

3. Versatility

These pipes can be efficiently used in many different applications such as plumbing, HVAC systems, and structural supports. Their utilization in the distribution of various media, namely water, gas, and air raises their utility value to the maximum.

4. Cost-Effectiveness

Investment in galvanized steel pipes might be more economical in the long haul. Less need for repair and fewer replacements, due to the pipes are resistant to corrosion and of good quality.

Why Choose Our Galvanized Steel Pipes?

Here are a few reasons why you should consider our products:

Top Manufacturing Quality: We are involved in the making of pipes that comply with international standards (GB, JIS) through the application of new production methods including cold rolling and galvanization techniques.

Impressive Experience: Our more than 15 years of serving the steel industry have prepared us to guarantee our customers the best products at all times.

Reasonable Prices: We set our prices reasonably so that we can offer our customers the best quality, and they can choose our products for their projects.

Specialized Assistance: Our professionals in the sales and customer service departments will be glad to help you. And guide you through your buying journey, and will make it really smooth and easy for you.

Global Distribution: We are delivering our goods to various regions around the world. Thus, clients in different corners of the world will be able to reach us and get high-quality galvanized steel pipes.

Conclusion

A 400 mm outer diameter steel pipe is a highly versatile and indispensable part of various industrial and construction applications. Being familiar with its dimensions and uses will put you in a good position to make decisions concerning which pipe is suitable for you. Our galvanized steel pipes are not only resistant to attack by corrosion but also gain a good deal of durability.

Contact us today if you seek further details on our products or would like to get a comprehensive quotation.

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