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Galvanized Steel Pipe

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We have advanced production equipment, a large warehouse reserve, and maintain long-term cooperative relations with major steel mills such as Jigang Group, Shandong Iron and Steel Group, and Laiwu Steel Group.

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Our products all provide material lists and quality assurance certificates, undergo SGS third-party testing, and have passed ISO9002 certification.

Advanced Production Equipment

Our factory has galvanized testing instruments, hardness measuring instruments, tensile testing instruments, etc.

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What is Galvanized Steel Pipe?

Galvanized iron pipes are steel or iron pipes that have been coated in zinc to prevent rust and corrosion. They were commonly used for water distribution systems in homes from the 1880s to the 1980s, but are no longer used for drinking water.

Galvanized Round Pipe

Section Shape：ROUNDSurface Treatment：galvanizedTolerance：±1%Oiled or Non-oiled：Non-oiledThickness：1.2-15.7mm or as requiredLength：12M, 6m, 6.4M, as required, other

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Galvanized Square Tube

Section Shape：SquareSurface Treatment：galvanizedTolerance：±1%Oiled or Non-oiled：Non-oiledThickness：1.0-6.0mmLength：12M, 6mThickness：0.8mm-50mm

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Galvanized Steel Pipe Fittings

Material: Galvanized. Shape: Equal. Head Code: Square or Round. Angle: 90 Degree. Wall Thickness: 0.5mm-10.0mm

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Galvanised Threaded Pipe Fittings

Connection: Threaded, Screwed. Shape: Equal. Head Code: Banded, Beaded, Plain. Angle: 90 Degree. Material: Malleable Cast Iron. Technics: Casting

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Square Steel Pipe

Type: Welded. Technique: ERW. Material: Carbon Steel. Surface Treatment: Galvanized. Usage: Pipeline Transport, Boiler Pipe, Hydraulic/Automobile Pipe, Machinery Industry, Construction & Decoration,

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Round Scaffold Tube

Type: Seamless. Technique: Hot Rolled. Material: Carbon Steel. Surface Treatment: Galvanized. Section Shape: Round. Tolerance: ±1%. Oiled or Non-oiled: Non-oiled

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Galvanized Rectangular Hollow Section

Zinc Coating: 30-400g. Thickness: 0.5-12mm. Length: 1-12m. Tolerance: ±1%. Specification: Standard Or Customized. Shape: Square. Alloy: Non-alloy

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Zinc Coated Steel Pipe

Section Shape: Round, rectangle. Surface Treatment: galvanized. Tolerance: ±1%. Size: Can Be Customized. Pre-Galvanized: Z40-80G/M2

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Advantages Of Using Galvanized Steel Pipes

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 of time. Rust is caused by oxidization, which leaves marks that stain and damage the steel. This is why it is best to have a steel surface that is protected against these elements and has increased strength and resistance.

Long Lifespan
With an extra protective layer of molten zinc present on the surface, galvanized steel pipes have a longer lifespan compared to conventional piping. This means that they can last for a number of years before needing to be replaced, ensuring that various substances have a proper channel where they can be moved to different locations. Steel is designed to last for a long period of time, which is why using galvanized steel pipes would be the best option for a wide variety of industries.

Cost-Effective
Steel maintenance can be very costly, as industries regularly conduct checks and repairs in order to make sure that their equipment and facilities are operating effectively. Using conventional steel pipes tend to wear out more quickly, which means that you would need to repair and replace the pipes more often.

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 due to the fact that these pipes are ready-made, which means that you would no longer need to prepare or paint the surface before installing these sections. This drastically lessens the construction time by a number of minutes or hours, making sure you would be able to finish projects at a much faster rate. If you have a tight project deadline for your construction project, using galvanized steel pipes are the most efficient option.

Key Takeaway
Galvanized steel has become one of the most reliable types of industrial steel used in various industries across the world. With a strong and durable layer that can protect it from external elements and corrosive substances, using galvanized steel pipes is the best option for your industry.

Features Of Galvanized Steel Pipe

1. The zinc coating is thick, with detailed, uniform and non-porous crystals, and excellent corrosion resistance.

2. The zinc layer obtained by electroplating is relatively pure, and it corrodes slowly in the mist of acid, alkali, etc., and can effectively maintain the steel substrate.

3. Because the zinc coating has excellent ductility, it can be formed by cold punching, rolling, bending, etc. without damaging the coating.

4. The zinc coating is passivated by chromic acid to form white, colorful, military green, etc., beautiful and generous, with certain decorative properties.

5. A thick and dense pure zinc layer covers the surface of the steel, which can prevent the steel substrate from touching any corrosive solution and protect the steel substrate from corrosion. In the general atmosphere, the surface of the zinc layer constitutes a very thin and dense zinc oxide layer surface, which is difficult to dissolve in water, so it has a certain maintenance effect on the steel substrate. If zinc oxide and other components in the atmosphere form insoluble zinc salts, the anti-corrosion effect is more promising.

6. With iron-zinc alloy layer, combined with compactness, it exhibits unique corrosion resistance in marine salt spray atmosphere and industrial atmosphere.

7. Because of the strong combination, zinc and iron are mutually soluble and have strong wear resistance.

8. After the steel structural parts are hot-dip galvanized, it is equivalent to one annealing treatment, which can effectively improve the mechanical function of the steel matrix, eliminate the stress during the forming and welding of the steel parts, and is beneficial to the turning of the steel structural parts.

9. Because zinc has excellent ductility and its alloy layer is firmly attached to the steel base, hot-dipped parts can be formed by cold punching, rolling, wire drawing, and bending without damaging the coating.

10. The surface of the parts after hot-dip galvanizing is bright and beautiful.

11. The pure zinc layer is a layer of galvanized layer endowed with plasticity in hot-dip galvanizing. Its properties are basically close to pure zinc and have ductility, so it is rich in flexibility.

Manufacturing 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 Weld Galvanized Steel Pipes?

Welding galvanized steel pipes requires specific techniques and precautions to ensure a strong and reliable weld while minimizing the risk of zinc fumes and other hazards. Here’s a general guide on how to weld galvanized steel pipes:

Safety Precautions:
Wear appropriate personal protective equipment (PPE), including welding gloves, a welding helmet with a proper filter, protective clothing, and respiratory protection.
Work in a well-ventilated area or use exhaust ventilation to minimize exposure to zinc fumes.
Avoid welding galvanized steel pipes near flammable materials to prevent the risk of fire.

Preparation:
Clean the galvanized steel pipe thoroughly before welding to remove any dirt, grease, or zinc coating residue. Use a wire brush or a dedicated cleaning solution to ensure a clean surface.
Be aware that welding galvanized steel produces toxic fumes, so make sure the workspace is properly ventilated and use respiratory protection.

Selection of Welding Method:
There are several welding methods suitable for galvanized steel pipes, including stick welding (SMAW), MIG welding (GMAW), and TIG welding (GTAW).
Choose the appropriate welding method based on the thickness of the galvanized steel pipe and the desired welding technique.

Welding Techniques:
Ensure a proper fit-up of the pipes, maintaining the desired joint configuration.
Set the welding machine to the appropriate settings based on the welding method, pipe thickness, and joint configuration.
Start welding from the root of the joint and maintain a steady travel speed to achieve a uniform and strong weld.
If using the MIG welding method, adjust the voltage, wire feed speed, and shielding gas flow rate according to the manufacturer’s recommendations.
For TIG welding, use a filler rod suitable for galvanized steel and employ proper techniques to control heat input and achieve a clean and precise weld.

Post-Welding:
Allow the welded joint to cool naturally and avoid quenching it with water, as this can lead to rapid zinc corrosion.
Inspect the weld for any defects or imperfections and address them if necessary.
If required, remove any excess zinc around the weld bead using a wire brush or grinder.
It’s crucial to note that welding galvanized steel produces toxic zinc fumes that can cause health hazards. Ensure proper ventilation, use respiratory protection, and follow safety guidelines to minimize exposure.

Applications of Galvanized Steel Pipes

01/

Construction Industry
These pipes are used to reinforce buildings and systems with unmatched strength. They are used in structural components and framing, providing the backbone for sturdy and long-lasting construction projects.

02/

Galvanized Steel Pipes in Agriculture and Irrigation
For water transportation and storage, these pipes are a game-changer. Their corrosion-resistant nature ensures that the water remains uncontaminated. This is vital for irrigation systems. This durability is crucial when pipes are exposed to various weather conditions.

03/

Home and Industrial Use
In domestic plumbing systems, GI pipes ensure a long-lasting network for water distribution. Their resistance to corrosion and rust makes them ideal for this role. They are capable of preventing leaks and maintaining water quality.

04/

Transportation and Automotive Industry
In vehicle manufacturing, these pipes are crucial in crafting robust frames and components. Their ability to withstand high stress makes them ideal for vehicles. This durability ensures the longevity of vehicles, making them more reliable.

05/

Environmental Impact and Sustainability
Galvanized steel stands out for its environmental sustainability. A key aspect is its recyclability. These materials can be completely recycled without loss of quality. This reduces waste and conserves resources.

06/

The Enduring Legacy of Galvanized Steel Pipes
Galvanized steel pipes are a cornerstone of infrastructure, offering unmatched durability, and versatility. From construction frameworks to plumbing, their benefits are evident across various industries.

Advantages Of Galvanized Steel Pipes In Construction Projects

Galvanized steel pipes are widely used in construction projects due to their many advantages. These pipes are made of steel coated with a layer of zinc to provide protection against corrosion. In this article, we will discuss the various advantages of galvanized steel pipes in construction projects.

One of the main advantages of galvanized steel pipe is its durability. The zinc coating on these pipes acts as a barrier, preventing the steel from being exposed to moisture and other corrosive elements. This makes galvanized steel pipes highly rust- and corrosion-resistant, ensuring a longer service life compared to other types of pipes.

Another advantage of galvanized steel pipe is its strength. Steel is known for its high tensile strength, so when combined with a protective zinc coating, galvanized steel pipe becomes even stronger. This advantage makes them suitable for a wide range of construction applications, including structural supports, pipes and fencing.

Galvanized steel pipe is also known for its versatility. They can be easily welded and are ideal for joining different parts of a construction project. Additionally, these pipes can be threaded for easier installation and connection to other pipes or electrical systems. This versatility makes galvanized steel pipe a popular choice among contractors and builders.

In addition to durability, strength, and versatility, galvanized steel pipe is also cost-effective. While the initial cost of galvanized steel pipe may be slightly higher compared to other types of pipe, its long service life and lower maintenance requirements make it a cost-effective option in the long run. The galvanized coating on these pipes provides excellent protection against corrosion, reducing the need for frequent repairs or replacements.

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FAQ

Q: What is galvanized steel pipe used for?

A: Galvanized pipe has been used as a water supply line material in homes and businesses for more than 30 years. It's also a suitable material for sewer plumbing. Galvanized pipe has many other uses besides water and sewer lines, including fences, railings, scaffolding, and farm irrigation systems.

Q: Is galvanized steel pipe OK for water?

A: Galvanized steel will eventually start to corrode and can pose a hazard for drinking water, which makes it unsafe for drinking water in the long run. The problem isn't the zinc coating but lead and cadmium, two heavy metals that can exist in the zinc because of the galvanizing process.

Q: Will galvanized steel pipe rust?

A: Galvanized pipes are often victims of corrosion and rust over time. Galvanization doesn't stop rust; it just creates a new layer on the pipe that is exposed to rust first. But as years and decades go by, the protective zinc layer eventually becomes completely corroded.

Q: When not to use galvanized pipe?

A: If your home's pipes are from the 1960s or earlier, they are likely nearing the end of their functional life span. However, there's a reason galvanized pipes are no longer used in modern construction: the risk they pose to a home's water supply and people's health.

Q: When did they stop using galvanized pipes in houses?

A: Many homes built before the 1960s used galvanized steel pipes for indoor plumbing. Some galvanized plumbing was still being installed as late as the 1980s.

Q: Do I need to replace galvanized pipes?

A: As galvanized pipes age, they may show noticeable signs of rusting and can even rust clear through the pipe and cause leaking. If you identify rust or large lumpy growths around joints or along pipes during an inspection of plumbing, it's probably a good time to consider upgrading your pipes.

Q: How long will galvanized steel last before it rusts?

A: The zinc coating of hot-dipped galvanized steel will last in the harshest soil is 35 to 50 years and in less corrosive soil 75 years or more. Although humidity affects corrosion, temperature itself has less of an impact. Galvanized zinc coatings respond well in extreme cold and hot temperatures.

Q: How to tell if it's galvanized steel?

A: You can tell that metal is galvanized when it has a pattern to it that is known as a spangle pattern. A spangle pattern almost looks like someone dipped a sponge in gray paint and then sponge-painted the metal. You'll notice darker and lighter spots, much like you would see when a wall is sponge painted.

Q: What is the life expectancy of galvanized pipes?

A: Galvanized steel pipes have an average life expectancy of 40 to 50 years.

Q: What does galvanized steel pipe look like?

A: An easy way to determine if a home has galvanized pipes is to look where the piping enters the home and scratch the piping. If the pipe looks like a copper penny, then it is copper plumbing. If it is galvanized steel, the area will look silvery grey and have threads.

Q: How do I know when to replace my galvanized pipe?

A: Early signs to look for are decreased water pressure and brown or rust-colored water coming out of your faucet. Rust around the pipe joints or rust spots are more advanced signs. The final life stages of the pipes are ruptured pipes and pin-hole leaks.

Q: What is the difference between a regular steel pipe and a galvanized steel pipe?

A: Durability. While it's true that steel is already a relatively durable material, galvanized pipes have better strength due to the protective zinc coating. The coating takes on the damage rather than the steel itself and it will rust before the interior.

Q: What happens when you connect copper to galvanized pipe?

A: Whenever two different types of metal come into contact with each other or an electrolyte (like tap water), one of the metals might begin to corrode. That's why joining dissimilar metal pipes requires using the correct insulating transition fittings.

Q: Can I use galvanized steel pipe for water?

A: Galvanized steel pipe is a very common material used in domestic water systems, primarily for larger pipe diameters (DN 50 or 80 (NPS 2 or 3) and above) due to the expense of copper pipe. While galvanized pipe is allowed in most building codes, it has corrosion issues when used for hot, softened water service.

Q: What is the life expectancy of steel pipes?

A: The life expectancy of steel pipe is eighty to one hundred years and lacks the danger of leaving behind lead in the water. Steel pipes are dipped in zinc to provide them with a layer of protective coating. This prevents corrosion and increases their lifespan.

Q: How do you maintain steel pipes?

A: 6 Ways to Enhance the Longevity of Seamless Pipes
Avoid Metal to Metal Contact. ...
Reduce Seamless Pipe and Steel Movement. ...
Carry Out Regular Inspection. ...
Clean and Polish Steel Pipes Regularly. ...
Identify and Make Repairs. ...
Choose High-quality Seamless Steel Pipes.

Q: When did they stop using steel pipes?

A: Galvanized piping was created to replace the old lead piping used for home water supply lines. Many homes built before the 1960s used galvanized steel pipes for indoor plumbing. Some galvanized plumbing was still being installed as late as the 1980s.

Q: What are the problems with galvanized steel plumbing?

A: Over time, the galvanized steel pipes begin to rust or corrode from the inside out, resulting in reduced water pressure and restricted water flow. This presents an increased risk of leaks or ruptures occurring in the pipes and the potential for flood damage.

Q: What are the benefits of galvanised steel?

A: A galvanized coating provides a physical barrier which is metallurgically bonded, and prevents the underlying steel from being exposed to atmospheric conditions. This coating is highly durable and has an adhesive strength of up to seven times that of organic paint coatings.

Q: What is the life expectancy of galvanized steel?

A: The answer to this question depends on the environment that the galvanised steel structure is exposed to. With average atmospheric zinc corrosion rates across the the UK and Ireland normally being less than 1µm per year, a typical 85µm coating can provide over 85 years of maintenance-free life.

We're well-known as one of the leading galvanized steel pipe manufacturers and suppliers in China. Please rest assured to buy high quality galvanized steel pipe for sale here from our factory. For price consultation, contact us.

Zinc Coated Steel Pipe, Square Steel Pipe, Galvanized Rectangular Hollow Section