The Difference between EMT Hot-dip Galvanized Pipe And EMT Pre Galvanized Pipe

There are significant differences between EMT hot-dip galvanized pipes and EMT pre galvanized pipes in multiple aspects, mainly reflected in production processes, anti-corrosion performance, zinc layer thickness, application scenarios, and prices. The following is a detailed summary of the differences between the two:

1、 Production process

EMT hot-dip galvanized pipe:

The production process involves first pickling the steel, then completely immersing it in molten zinc solution, and forming a zinc layer on the surface of the steel pipe through hot dip coating.

This process can ensure that the zinc layer is tightly bonded to the surface of the steel pipe, forming a strong protective layer.

EMT pre galvanized pipe:

Usually, a layer of zinc is deposited on the surface of steel pipes through electroplating.

The electroplating process is relatively simple, but it may not be as good as the hot-dip galvanizing process in terms of zinc layer uniformity and adhesion.

2、 Anti corrosion performance

EMT hot-dip galvanized pipe:

The thickness of the zinc layer is generally above 70 microns on average, and it has good corrosion resistance.

Capable of long-term use in harsh working environments and maintaining high corrosion resistance.

EMT pre galvanized pipe:

The thickness of the zinc layer is relatively thin, generally between 5-15 microns.

The anti-corrosion performance is relatively weak and may not be suitable for long-term use in extreme environments.

3、 Zinc layer thickness

EMT hot-dip galvanized pipe: The zinc layer thickness is thicker, averaging over 40 microns, providing stronger anti-corrosion protection.

EMT pre galvanized pipe: The zinc layer thickness is relatively thin, generally between 5-15 microns, and the anti-corrosion ability is limited.

4、 Application scenarios

EMT hot-dip galvanized pipe:

Due to its excellent anti-corrosion performance and high strength, it is commonly used in the structural or steel structure engineering of large buildings, such as pipelines, stairs, bridges, etc.

It is also suitable for industrial fields that require high anti-corrosion performance.

EMT pre galvanized pipe:

Commonly used in situations where anti-corrosion performance is not required, such as pipeline systems in small buildings, such as water supply pipes, natural gas pipelines, etc.

The price is relatively low, suitable for some light industry, home decoration, and infrastructure construction.

5、 Price

EMT hot-dip galvanized pipe: Due to its complex production process and excellent anti-corrosion performance, the price is relatively high.

EMT pre galvanized pipe: The production process is relatively simple, the price is lower, and it is more suitable for some scenarios with cost requirements.

In summary, there are significant differences between EMT hot-dip galvanized pipes and EMT pre galvanized pipes in terms of production process, anti-corrosion performance, zinc layer thickness, application scenarios, and price. Choosing the appropriate pipe material requires weighing based on specific usage scenarios and requirements.