Galvanized Steel Pipe
Why Choose Us
Rich experience
We have at least 10 years of experience in steel product manufacturing and R&D, and accept most customized products of all materials.
Professional team
Our factory has first-class production processes and technological levels to ensure product quality, advanced production equipment and technical team to ensure product production efficiency.
Our Certificate
Our products have passed ISO9001 international well-known certification bodies.
After-sales service
Understand customer's use of products and services and opinions, timely find and solve problems, improve customer satisfaction.
What is Galvanized Steel Pipe
Galvanized steel pipes are hollow iron pipes with thin walls and the ability to withstand great pressure from both inside and outside.The outside of the pipe wall is coated with a hot-dip galvanized layer to protect the pipe from damage,prevents corrosion and rust due to the effects of environmental conditions and chemicals.With many applications in life, galvanized steel pipes are a product that many businesses, establishments or individuals choose to order to serve their needs. When buying galvanized steel pipes, you'd better choose reputable steel suppliers or distributors with many years experience in the market to.
Benefits of Galvanized Steel Pipe
Strong Corrosion Resistance
One of the biggest issues of any type of metal is corrosion, as it damages and weakens the surface, causing parts and sections to break after a certain period.Using Galvanized steel pipes provides you with a steel surface that is protected against corrosive elements and has increased strength and resistance.
Long Lifespan
With an extra protective layer of molten zinc on the surface, galvanized steel pipes have a longer lifespan than conventional piping. This means that they can last for several years before needing to be replaced. With galvanized pipes, your pipes will last longer, which will save you money in the long run.
Cost-effective
Steel maintenance can be very costly, using conventional steel pipes tend to wear out more quickly, which means that you would need to repair and replace the pipes more often. Galvanized steel pipes have a lifespan of 50 years, compared to 20 to 25 years of conventional steel pipes. By using galvanized steel pipes, you would have a set of pipes that can last longer, which means that you would be able to lessen maintenance and repair costs.
Quick Installation
Along with having a strong protective surface that increases resistance to wear and tear, galvanized steel pipes are easy to install.This is because these pipes are ready-made, which means that you would no longer need to prepare or paint the surface before installing these sections.
Hot-dip galvanized steel pipe
Hot-dip galvanized steel pipe is characterized by uniform coating, good adhesion, and long service life. Coiled galvanized strips are often used for zinc supplementation. Hot-dip galvanized steel pipe is a method of alloying molten steel and iron-based materials to form an alloy. It is a new type of hot-dip galvanized steel pipe that combines steel-based materials and coating materials. Hot-dip galvanizing is to pickle the steel pipe first. In order to remove the iron oxide on the surface of the steel pipe, after pickling, it is then treated with ammonium chloride or zinc chloride aqueous solution or a mixed aqueous solution of ammonium chloride and zinc chloride. Clean it before sending it to the hot-dip coating tank. In this case, the surface of the steel pipe undergoes complex physical and chemical reactions with the liquid metal to form a corrosion-resistant dense zinc-iron alloy.
Cold galvanized steel pipe
The zinc layer of cold-dip galvanized steel pipe is an electroplated coating separated from the steel pipe base material. The thickness of the galvanized layer is small, the adhesion to the steel pipe substrate is strong, it is easy to fall off, and the corrosion resistance is poor. Therefore, in civil buildings, cold-galvanized steel pipes cannot be used as water supply pipes. Cold galvanizing refers to galvanizing, and the amount of galvanizing is very small, generally between 10-50 g/m2, but its corrosion resistance is much worse than that of hot-dip galvanized pipes.
Application of Galvanized Steel Pipe
Applications in solar energy
Solar panels have a large mass of 20-24kg to ensure that the system is not affected by the effects of storms or high winds. Therefore, the support frame must be solid and capable of withstanding large loads and wind levels of 10 and 12 in stormy weather. In addition, the frames that support the solar system are placed outside and are often affected by the weather, so they must resist corrosion.Thanks to its stable, solid, high-strength, load-bearing, and good-bearing structure, Galvanized steel can meet all the above requirements in almost all materials.
Application in agriculture
Galvanized steel pipe has good rust resistance, a variety of sizes, and is easy to shape and install, so it is widely used in irrigation systems.Black and hot-dip galvanized steel pipes are also widely used in animal husbandry. Large steel pipes are used to make feed or waste pipes for livestock and poultry.In the fishery, fish farming cages are made from hot-dip galvanized steel pipes, replacing bamboo cages, overcoming limitations in rust resistance, life expectancy, and cage breakage when there are extensive underground waves.
Applications in plumbing
Steel pipes are widely utilized in water supply and drainage systems, high-pressure plumbing installations, or outdoor water supply networks. The nature of these projects all need large load capacity, easy to bend and shape according to the terrain and installation location, so galvanized steel pipe is the most appropriate option.In addition, square or rectangular steel pipes are used for ventilation systems, assembling house frames, scaffolding, bearing trusses.
Applications in telecommunications
The telecommunications system is the basis of social communication. Many telecommunications forms utilize galvanized steel pipes to produce public lighting, ultrasonic pile systems, broadcasting piles, telecommunications poles, phone wiring, equipment boxes.
What is the difference between black irons pipes and Galvanized Steel Pipe?
Manufacturing Process
Another significant difference between black iron pipes and galvanized pipes is associated with their manufacturing processes. Black iron pipes are manufactured by stretching the steel out into a seamless tube or forcing the edges together and sealing them with a weld.With galvanized pipes, the strip of iron goes through hot molten zinc. The zinc is heated up from 820 to 860 degrees Fahrenheit. After the coating, it is then cooled down in a quench tank to avoid unwanted effects from the newly formed coating with the atmosphere.
Corrosion Resistance
The main difference between black iron pipes and galvanized pipes has something to do with their corrosion resistance.Black iron is manufactured using a mild steel compound. It has a low-grade carbon content. The corrosion resistance of mild steel can be further strengthened through the addition of carbon.On the other hand, galvanized pipes are covered with a protective layer of zinc. The process of adding a layer of zinc is called galvanization, which makes the pipes possess an ideal property of higher corrosion resistance. In addition, galvanization helps prevent the buildup of mineral deposits that can block the pipelines.
Cost
Arguably, black iron pipes are less costly than galvanized pipes. This is due to the absence of zinc coating. Instead, black iron pipes are covered in iron oxide during the manufacturing process. Consider choosing black iron pipes over galvanized pipes if you have a budget in mind and if durability is not your primary consideration.
Applications
Both types of pipes have distinct properties that are ideal for certain applications. The seamless feature of black iron pipes makes it the best and safe option for transporting natural and propane gas. It is also used for fire sprinkler systems because it is more fire-resistant than galvanized pipe.Black iron pipes are known to corrode from water easily. This is where the usefulness of galvanized pipes comes into the picture. For over 30 years, galvanized pipes are mainly used for carrying water to supply infrastructures.
How to Choose Galvanized Steel Pipe
Galvanized Steel Pipe Size
Specify the nominal pipe size of the galvanized steel pipe based on the intended application. The size is typically expressed in inches or millimeters and refers to the inside diameter of the pipe. Common sizes range from 1/8 inch to 24 inches or more. They have the same basic steel pipe sizes with galvanization.
Schedule
Determine the appropriate schedule for the galvanized steel pipe based on the specific application requirements. The schedule determines the wall thickness of the pipe and can vary from Schedule 10 to Schedule 160, with Schedule 40 being one of the most commonly used options.
Length
Specify the desired length of the galvanized steel pipes. Common lengths include 21 feet or 6.4 meters, 24 feet or 7.3 meters, and custom lengths as needed. It is essential to consider the transportation and installation requirements when determining the pipe length.
Coating
Specify the galvanized coating requirements. Galvanized steel pipes typically have a hot-dip galvanized coating, but you may also specify other coating options if necessary. This includes specifying the thickness of the zinc coating, such as minimum coating weight in ounces per square foot or grams per square meter.
Standards and Specifications
Identify the relevant industry standards and specifications that the galvanized steel pipes must meet. This may include standards set by organizations like ASTM International (American Society for Testing and Materials) or ANSI (American National Standards Institute).
Additional Requirements
Specify any additional requirements, such as specific threading, end connections, or special testing needs.
Application
Provide information about the intended application or use of the galvanized steel pipes. This helps the supplier or manufacturer understand the project requirements and recommend the most suitable product.
Process of Galvanized Steel Pipe
Material Selection
The process begins with carefully selecting high-quality steel, typically low carbon steel, which is known for its strength and malleability.
Pipe Formation
The selected steel undergoes a series of processes, including cutting, bending, and shaping, to form pipes of desired dimensions. This step ensures that the pipes meet specific industry requirements and project specifications.
Surface Preparation
To prepare the pipe surface for galvanization, it goes through a rigorous cleaning process to remove any impurities, such as dirt, grease, and oxides. This ensures optimal adhesion of the zinc coating.
Galvanization
After the surface of the steel pipe is pretreated, it can be galvanized. There are two methods of galvanizing: hot-dip galvanizing and electro-galvanizing. Hot-dip galvanizing is to immerse the steel pipe in molten zinc, so that the zinc reacts with the surface of the steel pipe to form a layer of zinc. Electrogalvanizing is to immerse the steel pipe in an electrolyte solution containing zinc ions, and through the action of electric current, the zinc ions are reduced to a zinc layer on the surface of the steel pipe.
Cooling and Inspection
After galvanization, the pipes are carefully cooled and inspected for uniformity, adhesion, and thickness of the zinc coating. This step ensures the quality and durability of the finished product.
Packaging
Packaging galvanized steel pipe. It is usually packed in plastic bags or cartons to protect the zinc layer on the surface of the steel pipe from being damaged.
How to Maintain Galvanized Steel Pipe
Inspection and cleaning
Regularly inspecting and cleaning galvanized steel pipe are essential to prevent corrosion and blockages. Corrosion can weaken the pipe walls and cause leaks, while blockages can disrupt the flow of materials and cause pressure buildup. Thus, inspecting your pipes for signs of corrosion, rust, cracks, and leaks is crucial.you can use various methods to inspect your pipes, such as visual inspection, ultrasonic testing, magnetic particle inspection, and eddy current inspection. These methods can detect flaws and defects in the pipes and help you determine the extent of damage.
Coating and protection
Coating your galvanized steel pipe can provide additional protection against corrosion and damage. This can also improve the pipe's performance and extend its lifespan. Some standard coatings for steel pipes include epoxy, polyurethane, and zinc.epoxy coatings resist chemicals and abrasion and provide a smooth surface for better flow. Polyurethane coatings are durable and flexible and can withstand extreme temperatures and weather conditions. Zinc coatings, also known as galvanization, involve coating the steel with a layer of zinc to prevent corrosion.
Maintenance and repair
Regularly maintaining and repairing galvanized steel pipe are crucial to prevent failures and accidents. You should establish a maintenance schedule that includes regular inspections, cleaning, and repairs. You should also record your maintenance activities, including each check and repair's date, type, and results.repairing or replacing the affected pipes immediately is essential if you notice any damage or deterioration during an inspection. Delaying repairs can cause the damage to worsen and increase the risk of failure.
Galvanized Steel Pipe: What to Look For
Common grades
Many different grades of steel can be galvanized. A53 steel pipe and A595 steel pipe are two of the mostly common grades.But cast steel, hot-rolled steel, cold-rolled steel, and even some grades of stainless steel all qualify for galvanization. In general, the presence of iron in any metal makes it a candidate for a protective zinc coating.The difference among galvanized steel grades typically lies in how they were coated. For instance, a zinc-iron alloy actually composes 50%-70% of the coating for most hot-rolled steels. A thin layer of unalloyed zinc goes on top of that. Click the link to learn more about Kloeckner Metals' hot dip galvanizing and galvanization capabilities, and how the process benefits customers.
Common dimensions
Galvanized steel pipe comes in a variety of dimensions and sizes. When you buy it, you'll want to measure its diameter by nominal size. To find nominal size, measure the inside diameter of the pipe. Most nominal pipe sizes run between ¼ and 2 ½ inches.If you do not have access to a cut end to measure inside the pipe, you can estimate the nominal size of a pipe by measuring its outside. Keep in mind, however, that you'll have to account for wall size, which may be different from pipe to pipe.The rule of thumb says to measure the outer circumference and divide by pi (3.14). If you have a standard pipe, subtract ¼ inch for the wall. For an extra strong pipe, subtract ⅜ inch.
Chemical composition
The chemical composition matters because the metal has to bond at a chemical level with the zinc alloy that coats it. If a steel pipe has a silicon content above 0.25%, it will cause the zinc-alloy layer to grow very fast and eventually consume the unadulterated layer of zinc.In general, galvanized steel should have a carbon content of less than 0.25%, phosphorus of less than 0.05%, and manganese of less than 1.3%. Silicon should run between 0% and 0.25%.
All about corrosion
Grime, chemicals, moisture, or salt can corrode metal. Corrosion occurs when the atoms in the surface of the metal oxide or lose oxygen ions to the corroding element. Most metals oxidize easily to oxygen-rich environments such as air or water.By galvanizing steel, metal manufacturers prevent those corroding substances from reaching the metal underneath the zinc. Instead of the steel corroding, the zinc corrodes. Sometimes, an element called chromate is added to the zinc, which oxidizes the zinc faster. This is called sacrificial protection.
Our Factory
We have at least 10 years of experience in steel product manufacturing and R&D, and accept most customized products of all materials.
Our factory has first-class production processes and technological levels to ensure product quality, advanced production equipment and technical team to ensure product production efficiency. Adhering to the business philosophy of "quality first, customer first".We are one of the largest steel exporters in China. The company mainly exports products such as steel pipes, steel plates, carbon steel, galvanized steel, stainless steel, aluminum steel, and steel profiles.
FAQ