Galvanized steel pipe is often used in various industries because of its good corrosion resistance and low cost. So, How to manufacture galvanized steel pipes? Next, Wanzhi Steel, a steel pipe manufacturer with 17 years of experience in steel production, will tell you the answer.
Hot-dip Galvanized Steel Pipe Manufacturing Process
Hot-dip galvanized steel pipe is made by reacting the molten metal with an iron substrate to produce an alloy layer, thus combining both the substrate and the coating. The first step is to pickle the steel pipe first to remove the iron oxide on the surface of the pipe. After pickling, it is cleaned by ammonium chloride or zinc chloride in an aqueous solution or mixed aqueous solution of ammonium chloride and zinc chloride and then sent to a hot-dip galvanizing bath. Hot-dip galvanizing has the advantages of uniform plating, strong adhesion, and long service life.
Cold Galvanized Steel Pipe Manufacturing Process
Cold galvanizing is also known as electro-galvanizing. This method of galvanizing is used to protect the metal from corrosion. Cold galvanizing utilizes a coating of zinc filler, which is applied to the protected surface and dried to form a zinc filler coating. The dried coating has a content of zinc (up to 95%). The cold galvanizing process is used for the corrosion protection of various steel products and structures.
Hot-dip galvanized steel pipes have been developed through the 1960s~70s of the 20th century, and the quality of products has been greatly improved. The galvanized pipe uses the sulfate electro-galvanized iron alloy process, in which the production line is perforated straight through from tank to tank without any carry-over or overflow of the solution. Each process in the production process consists of a circulation system. There are only 5 cleaning tanks in the production line, which are discharged regularly by recycling.
Nowadays, there are many homes where galvanized piping is still used. It is easy to install and it costs less than stainless steel pipe. Some galvanized square tubes are often used in the construction industry. Many architects consider these square tubes to be good building materials. The galvanized pipe is galvanized to make it more rust-proof and will protect the building from receiving corrosion. In addition, the zinc layer of galvanized pipe ensures that the pipe is thick and uniform on all sides. As a result, there is no chance of spillage and loss if it is used for transporting pipes that carry water or other liquid substances. Welded pipe includes heat, stress, and other forming processes that can affect what is inside the pipe, but galvanized pipe is always safe to use.
Advantages of Galvanized Steel Pipe
1. Low Cost
Cost is a concern for everyone, and it can be difficult to find a good product that is low cost. That’s why galvanized pipe is at the top of everyone’s list. Galvanized pipe usually costs much less than stainless pipe. In addition, galvanizing is much less labor intensive, which in turn keeps costs down. In addition to cost, longevity is another added benefit of galvanizing. A properly galvanized pipe can last for decades.
2. Longer Life
With galvanizing, a piece of industrial steel can be expected to last over 50 years in average environments and over 20 years in severe water exposure. No maintenance is required. The increased durability of the finished steel also increases the reliability of the product.
3. Rust Resistance of Zinc Coating
Iron in steel is very susceptible to rusting, but the addition of zinc acts as a protective buffer between the steel and any moisture or oxygen. Galvanized steel is highly protective, including sharp corners and depressions that other coatings cannot protect, making it resistant to damage.
4. Low Maintenance and Toughness
The coating on galvanized pipes makes them tougher and more durable than other types of pipes. You will rarely see these pipes damaged during use or shipping. Of course, because of their toughness and longevity, maintaining galvanized pipes naturally requires much less maintenance. It is also much easier to inspect the pipes, which can be done by eye and does not really require any special tools.
5. Versatility of Galvanized Steel Pipe
Galvanized steel pipe is clearly more suitable for large construction projects and farm irrigation systems. The two main reasons for this are that galvanized steel pipe is more durable than many other alternatives. In addition, the diameter of this type of pipe is larger than what is actually possible with some other alternatives.
Finally, another advantage is assembly. Galvanized steel pipes are ready to use right from the manufacturer. No coating or painting is required, just installation.
Disadvantages
Do you know what are the disadvantages of galvanized steel pipe? Do they affect the performance of these disadvantages? Next, let’s find out.
1. Internal Corrosion
Although the zinc layer in galvanized pipe does prevent rusting for a certain amount of time, it will eventually rust over time. When this happens, the pipe begins to corrode from the inside out, which can eventually lead to a leak or pipe rupture.
2. Water Contamination
When galvanized pipes begin to corrode, corrosive substances and lead from the exposed metal can seep into your water supply. When this happens, these minerals begin to form a plaque that covers the inside of the pipe. Over time, the plaque begins to restrict the flow of water to your home. Then, the water may even change its color.
3. Zinc Layer Easily Peels Off
Despite its longevity and corrosion resistance, galvanized coatings are still subject to chipping, cracking, and similar damage. Using it on bollards designed to protect retail storefronts from vehicle damage, for example, can mean plenty of dings, scratches, and chips. The exposed metal rusts in reaction to the elements and spreads corrosion throughout the rest of the pipe or bollard. This eliminates any rust protection the coating provides. Powder coating over galvanized bollards also means bubbling and chipping issues.
The Weight and Handling of Galvanized Steel Pipe
Some people initially shy away from galvanized steel round pipe, despite its many benefits, because it can be more difficult to handle. Because galvanized steel is made of steel, it is heavy compared to lighter alternatives such as PVC. Although PVC has some other limitations compared to galvanized steel, its lightweight properties make PVC popular among home improvement enthusiasts.
Galvanized Steel and Maintenance
Overall, galvanized steel is generally as easy to maintain as other alternatives, with one possible exception. Galvanized steel pipe itself is more prone to mineral buildup than other alternatives, including PVC or copper. However, with proper proactive maintenance, this type of buildup can be minimized.
Damaged Galvanized Steel Pipes
One difference between galvanized steel pipe and some other alternatives is the response to damaged pipe. When galvanized pipe is damaged in some way, it is usually replaced rather than repaired.
Replacement is recommended because damage to galvanized steel pipes tends to weaken the zinc layer. The weakened zinc coating makes the pipe more susceptible to corrosion.
Contact Wanzhi Steel for Premium Steel Pipes
Wanzhi Steel is a reputable galvanized pipe supplier. If you want to get a good quality galvanized round pipe, take a look at what they offer. The tubes produced by Wanzhi Steel are made with great attention to quality.Every product will go through strict testing before it is shipped. Get in touch with Wanzhi Steel now to get specific information about galvanized pipes and other steel pipes.
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