coated PIPE



The coated pipe, also called Insulated Pipe, is a group of metal pipes with anti-corrosion coatings. These pipe coatings are commonly utilized to preserve the steel pipe used in the building of pipelines, reinforcing steel, and a broad variety of piping connections. 

Oil and gas coating pipe can be classified into two types, each with its own set of unique and stringent requirements: internal pipe coating and external coated pipes.

With TUSPIPE’s own coating technology and production lines, you can customise your  pipe coating to meet your production requirements. Whether it’s internal coating pipe  or external coating pipe, we always put quality first!


3pe coated pipe

3LPE Coated Pipe

Composition: FBE primer, copolymer adhesive, and polyethylene outer layer. Function: Corrosion resistance. Properties: superior mechanical properties and resistance to cathodic disbondment.


3LPP Coated Pipe

Composition: Fusion bonded epoxy primer, adhesive layer, and outer layer of polyethylene. Function: bonded epoxy primer provides corrosion resistance, the outer polyethylene layer offers UV resistance.


FBE Coated Pipe

Composition: FBE coatings are thermoset polymers, providing durable protection. Scenario: Fusion bonded epoxy coatings are classified as protective coatings in the coatings industry.

2pe coated pipe

2LPE Coated Pipe

Components: mastic-based adhesives and polyethylene copolymers. Function: Offers anti-corrosion protection for pipelines.

2lpp coated pipe

2LPP Coated Pipe

Composition:Multilayer coating comprising fusion bonded epoxy and polypropylene. Scenario:Suitable for various subsea production structures and installations in shallow and deep water.


3pe coated pipe

Internal Pipe Coating

The internal pipe coating increases their resistance to corrosion, enhances their flow, and reduces the creation of deposits. There are a variety of interior coatings for pipes, including Fusion Bonded Epoxy (FBE) Coating and Glass flake Coatings.

Pipe coatings are very common and are generally categorized into two types: internal and external coatings. According to the type of coating, it can be divided into: coal tar enamel, cement slurry sand, epoxy resin, polyurethane, FEB/LPE/LPP and so on.
Below is a description of the types of coatings that TUSPIPE Steel Pipe Factory can offer you to help the health of your piping system.

Internal Pipe COATING

Internal  pipelines coating is a process in which steel pipes are coated from the inside with a protective layer. This is done to resist the pipe to fluid or gas flow, as well as to reduce friction and wear. 

The most common method of internal coating is spray painting, in which a thin layer of paint is applied to the inner wall of the pipe. This coating type provides excellent resistance to most chemicals and is very durable.

Another popular option is the epoxy coating pipe, which is often used in food-grade applications. This coating type can provide protection against corrosion and abrasion, and it is also FDA-approved. Internal coating is an important process that helps to prolong the life of steel pipelines

the flow chart shows the process of internal coated pipe

Commonly used coatings for Internal coated pipes

Steel pipe is used for a variety of projects because it is tough and lasts a long time. One of the ways to further extend the life of steel pipe is to ensure that the interior is properly coated. There are five types of interior coating that are commonly used: coal tar enamel, cement mortar, liquid-applied epoxy, fusion bonded epoxy (FBE), and polyurethane (PU). Each coating pipe types has its own advantages and disadvantages, so it is important to select the right one for the project at hand. 

- Coal Tar Enamel coating pipes

Coal Tar Enamel (CTE) is a coating that is applied to the interior of steel pipes. CTE provides an extremely smooth and durable finish that is resistant to both corrosion and abrasion. The CTE process involves heating the steel pipe to over 1300°F and then coating it with a layer of coal tar. Once the coal tar has cooled, it forms a hard, impermeable barrier that protects the pipe from the elements. CTE is highly flexible and can be applied to pipes of all sizes and shapes. It also has excellent strength and adhesion properties, making it an ideal choice for use in corrosive environments. CTE-coated pipes are widely used in a variety of industries, including oil and gas, chemical processing, and power generation.

- Cement Mortar coating pipes

Cement mortar pipe internal coating is a protection layer that is applied to the inside of pipes. It is often used on sewer pipes and water pipes to protect them from abrasion, corrosion, and other damage. The cost of cement mortar pipe internal coating can vary depending on the type of material used and the size of the project. However, it is generally a relatively low-cost option compared to other methods of protection. When properly applied, cement mortar pipe internal coating can provide an excellent level of protection for many years. In some cases, it may even be possible to extend the life of a pipe by several decades. As such, it is an important consideration for any infrastructure project.

- Liquid Applied Epoxy coating pipes

Liquid applied epoxy coating pipe internal coating is a chemical resistant coating that is often used in food processing plants. It is designed to resist chemical leaching and degradation, and it can also help to protect the pipe from corrosion. The coating is applied to the inside of the pipe, and it cures to form a hard, durable surface. This type of coating is typically used on pipes that carry corrosive liquids or are exposed to high temperatures. It can also be used on pipes that transport food products, as it is non-toxic and will not contaminate the food. Liquid applied epoxy pipe internal coating is an important part of keeping pipes safe and functional in a variety of environments.

- Fusion Bonded Epoxies coating pipes

Fusion Bonded Epoxy (FBE) internal coating is a chemical-resistant coating that is applied to the inside of pipes. The coating helps to resist abrasion, chemical attack, and high temperatures. It is often used in applications where pipes are exposed to harsh chemicals or high temperatures. The coating can alsoextend the pipes’ life pipes by protecting them from damage.

- Polyurethane coating pipes

Polyurethane internal coating, also known as urethane coating, is chemical resistant, abrasion resistant, solid material that contains no volatile organic compounds (VOC). It is applied as a thick coating to the interior surfaces of pipes and other equipment to protect them from corrosion. Polyurethane internal coating is typically applied in two or more coats, with each coat allowed to cure before the next is applied. The cured coating is hard and durable and provides an excellent barrier against chemical attack and abrasion. Polyurethane internal coating is available in a variety of colors and can be customized to meet the specific needs of your application.

Executive Standard of PIPE Coating

  • API RP 5L2
  • ISO 15741
  • AWWA C210
  • SY/T 6717
  • DEP

External coated Pipe types

External pipelines coating are an important part of the oil and gas industry. They provide a barrier between the metal of the pipe and the environment, protecting the pipe from corrosion and other damage. Coatings also help to resist bacteria and chemicals that can be harmful to the pipeline. In addition, they can help to regulate temperature and protect the pipe from mechanical damage. The type of coating that is used depends on the specific needs of the pipeline. However, all coatings play an important role in protecting the pipeline from damage and ensuring its safe operation.

Coated Pipe

External Coated Pipes types

The Fusion Bonded Epoxy (FBE) coating prevents corrosion on pipe surfaces. Double or triple layers of FBE may even improve friction and abrasion resistance. In 3-layer PE/PP coating systems, FBE coating is also employed as the priming layer.

At temperatures ranging from 220 to 235°C, the electrostatic epoxy powder is sprayed onto a pipe. When the epoxy powder reaches the hot pipe surface, it melts and forms a uniform layer of epoxy coating on the pipe.

Dual-layer FBE is used for a variety of service applications, including directional drilling, anti-abrasion for road and river crossings, and oil, gas, and waterworks pipes. This coating, like single layer FBE (above), can be applied on a wide range of outer diameter (OD) sizes, from 3.5″ to 48″. In most situations, the top layer of abrasion resistance protects against erosion.

2LPE Coating is a two-layer polyethylene coating system that provides excellent protection for steel pipelines from corrosion, chemical attack, and abrasion. The first layer is a high-density polyethylene (HDPE) liner that is applied to the steel surface. The second layer is a co-polymer adhesive that bonds the HDPE liner to the steel surface. This two-layer system provides outstanding resistance to a wide range of chemicals and temperatures. 2LPE Coating is an ideal solution for protecting steel pipelines in a wide range of environments.

2LPP Coating is a steel pipeline coating that consists of a two-layer system. The first layer is a fusion-bonded epoxy (FBE) which provides corrosion and chemical resistance. The second layer is a polyethylene copolymer that provides mechanical protection and resistance to abrasion and cathodic disbondment. This type of coating is often used in high temperature environments, as it can withstand temperatures up to 120 degrees Celsius. 2LPP Coating is an effective way to protect steel pipelines from corrosion, chemical attack, and abrasion.

The three-layer polyethylene coating system offers superior protection against corrosion compared to traditional epoxy powder and two-layer PE coatings. The FBE layer provides an effective barrier against corrosion, while the PE layer resists water penetration and mechanical damage. This coating system can withstand temperatures of up to 50°C (low and medium density polyethylene) or 70°C (high-density polyethylene), making it an ideal choice for a wide range of applications.

3PP coating is a three-layer polypropylene anticorrosive coating that is primarily used as an anticorrosive pipeline layer for conveying high-temperature mediums and as an anticorrosive pipeline layer in desert areas with high surface temperatures and long periods of sunshine. The 3PP coating consists of a base layer of epoxy powder, an intermediate layer of binder, and an outer layer of polypropylene (PP) jacket. The 3PP coating takes all of the benefits of the 3PE coating and improves its operating temperature performance significantly. The improved operating temperature performance of the 3PP coating makes it an excellent choice for use in high-temperature environments and desert conditions.

Why choose tuspipe?


Since 1998, Tianjin United Steel Pipe Co., Ltd (TUSPIPE) has been committed to supplying high-quality line pipes.

With over 500,000 tons annual production capacity, the company serves various fields and industries, such as oil & gas exploitation and transmission, ship & auto-building, water & electricity, environmental protection, mechanical engineering, infrastructure construction and etc.

TUSPIPE places a premium on product quality and rigorous product quality control. In order to maintain good product quality,  the company has established a Test & Inspection Center since 2004. With a series of state-of-the-art tests and inspection equipment, the test & inspection center is able to perform the tensile tests, hydro tests, impact tests, DWTT, etc.

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