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Why are 3PE anti-corrosion steel pipes widely used?

Why are 3PE anti-corrosion steel pipes widely used?

2022-03-30

3PE anti-corrosion steel pipes are categorized into standard, enhanced, and extra-enhanced grades, with prices ranging from approximately 35 to 50 yuan per square meter. The base materials include seamless steel pipes, spiral steel pipes, and straight-seam steel pipes. Due to their excellent corrosion resistance, resistance to water vapor permeation, and mechanical properties, the anti-corrosion coatings of 3PE steel pipes have been widely adopted in the oil pipeline industry.

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What are the main pieces of equipment used to manufacture 3PE-coated steel pipes?

What are the main pieces of equipment used to manufacture 3PE-coated steel pipes?

2022-03-28

3PE anti-corrosion steel pipes in China are manufactured according to the SY/T standard, which came into effect on August 1, 2002. The primary standard specifications include polyethylene and high-density polyethylene, with a Vicat softening temperature of no less than 110°C. The thickness of the external anti-corrosion layer is determined based on the German standard DIN, and low-density and medium-density polyethylene are mainly used. This significantly enhances the impact resistance of the 3PE anti-corrosion coating. The SY/T standard substantially improves both the peel strength and impact resistance of the 3PE anti-corrosion layer, explicitly stipulating that the carbon black content in certain special materials must be controlled to ensure the mechanical strength and weather resistance of the 3PE coating. Additionally, it increases the peel strength at joints—specifically, the bond strength between heat-shrink sleeves and heat-shrink tapes.

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How can we distinguish between 3PE anti-corrosion steel pipes and plastic-coated pipes?

How can we distinguish between 3PE anti-corrosion steel pipes and plastic-coated pipes?

2022-03-24

Oil and gas pipelines are predominantly made of steel pipes. If left unprotected and buried underground—even in dry desert environments—they will quickly succumb to corrosion. Therefore, to ensure these pipelines perform optimally, we need to select corrosion-resistant steel pipes. Today, there are many types of corrosion-resistant steel pipes available on the market, including 3PE-coated pipes, TPEP-coated pipes, and epoxy-resin-coated pipes. Among these, 3PE-coated pipes boast superior corrosion resistance, moisture-proof properties, and mechanical performance, making them widely used in the oil pipeline industry. At first glance, 3PE-coated pipes look very similar to plastic-coated pipes. So, how can we distinguish between 3PE-coated pipes and plastic-coated pipes?

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Applications of 3PE anti-corrosion steel pipes

Applications of 3PE anti-corrosion steel pipes

2022-03-22

3PE anti-corrosion steel pipes are designed for pipelines used in various working environments. To slow down or prevent corrosion and degradation of pipelines caused by chemical and electrochemical reactions from external media or the metabolic activities of microorganisms, two or three layers of polyethylene are applied to the outer surface of the pipeline, thereby extending the service life of 3PE anti-corrosion pipes by a factor of 3 to 5. The coating consists of: an inner layer of fused epoxy; an intermediate layer of adhesive; and an outer layer of extruded polyethylene. The total thickness of the protective layer is approximately 1.8 to 3.7 millimeters.

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Uses and Advantages of 3PE Coated Steel Pipes

Uses and Advantages of 3PE Coated Steel Pipes

2022-03-21

When it comes to 3PE-coated steel pipes, many people know one thing but are unaware of another. Indeed, these pipes boast a wide range of applications, making them suitable for underground water supply and drainage systems, underground grouting operations, positive and negative pressure ventilation systems, gas extraction, fire sprinkler systems, and other pipeline networks. They are also ideal for process water, waste residue, and return water pipelines in thermal power plants. Moreover, they are highly compatible with water supply pipelines for spray suppression systems and automatic sprinkler fire-extinguishing systems.

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What are some ways to prevent 3PE-coated steel pipes from curling at the edges?

What are some ways to prevent 3PE-coated steel pipes from curling at the edges?

2022-03-19

3PE anti-corrosion steel pipes boast excellent corrosion resistance and water resistance, making them widely used across various industries. However, these anti-corrosion steel pipes are prone to edge warping due to corrosion. This occurs because, when preparing the bevel for the polyethylene layer in the reserved section during grinding, the remaining height of the weld at the pipe end is either left unground or ground unevenly. As a result, the epoxy powder beneath the polyethylene on the protruding portion of the weld gets worn away. Once the pipe is exposed outdoors for an extended period, the metal surface of the weld becomes corroded, leading to edge warping. So, what methods can be employed to prevent the steel pipe from warping?

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Take you to learn about 3PE anti-corrosion steel pipes.

Take you to learn about 3PE anti-corrosion steel pipes.

2022-03-17

The national standard thickness for 3PE-coated steel pipes is between 2.5 and 3.7 mm. For the same standard, 3PE-coated welded pipes generally have a wall thickness that is at least 0.5 mm greater than that of ordinary-grade pipes. This coating exhibits excellent temperature resistance and can be used reliably over a long period at temperatures ranging from -40°C to 300°C. It does not burn or soften, boasts high strength, and can withstand test pressures up to 5.5 MPa at room temperature. It offers low fluid resistance, prevents scaling in pipelines, and thereby enhances transportation efficiency. Additionally, it is highly resistant to corrosion by acids, alkalis, and salts, ensuring that the pipeline remains rust-free for up to 50 years.

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What are the advantages of 3PE-coated steel pipes?

What are the advantages of 3PE-coated steel pipes?

2022-03-14

Some people have a certain understanding of 3PE-coated steel pipes. These pipes boast a remarkably broad range of applications, making them suitable for underground water supply and drainage systems in coal mines, underground grouting operations, positive and negative pressure ventilation systems, drainage networks, fire-fighting sprinkler systems, and more. The manufacturing processes for 2PP and 3PP coatings are quite similar, but the raw materials used differ. What’s particularly noteworthy about this type of anti-corrosion coating is its simple manufacturing process, excellent corrosion resistance, and low cost—making it a widely accepted anti-corrosion method in the pipeline industry.

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What aspects should be considered when choosing a 3PE anti-corrosion steel pipe manufacturer?

What aspects should be considered when choosing a 3PE anti-corrosion steel pipe manufacturer?

2022-02-15

Estimate the weight and price of 3PE-coated steel pipes based on the selected specifications and length of the 3PE-coated steel pipe, as well as the unit price of 3PE-coated steel pipes with different anti-corrosion coatings. The estimation is based on the spiral management theoretical weight table, but this table is for reference only and should be adjusted according to actual conditions. At the same time, be sure to check the specification tolerances and then customize the specifications accordingly.

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What are the differences between coated anti-corrosion steel pipes and lined anti-corrosion steel pipes?

What are the differences between coated anti-corrosion steel pipes and lined anti-corrosion steel pipes?

2022-01-17

Both coated anti-corrosion steel pipes and lined anti-corrosion steel pipes are types of anti-corrosion steel pipes, each possessing the characteristic features of anti-corrosion steel pipes. However, they differ in terms of manufacturing processes and construction methods. Below, we’ll analyze the differences between these two products for you.

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