What Are The Different Types Of Pipe Coatings Commonly Used In The Industry, And What Are Their Specific Advantages And Applications?

 

The coating of the pipe is an important factor in keeping the joints of the pipes intact and to make the pipeline system work properly. A pipe buried underground will face many elements and things that can damage or harm the pipe's condition and that's why Pipe coating services are important as its job is to save the pipeline from the corrosive nature of sand. The soil can be soft, hard, or muddy and all of them can prove to be harmful for pipelines. 


 

The coating acts as a protection for the pipelines from any harmful element present in the environment. Different types of coatings are available and in this blog, we will discuss what are the different types of pipe coatings commonly used in the industry, and what are their specific advantages and applications to make you aware of which will be the best one.

Types of pipe coatings

Following are some of the most common types of coating methods that are used in different industries especially for underground piping:

·         Coal tar-based coatings

This is one of the most common types of coating used in different industries and is created through a process of plasticizing coal tar, distillates and some coals. The coating is basically used in conjunction by using it with primer, fiberglass, inner wrap, mineral reinforcement and any type of outer wrap (coal tar enamel impregnated glass fiber).

·         Fusion Bonded Epoxy Coating (FBE)

Epoxy is basically a kind of polymer that is a family of chemical compounds which contains a large number of molecules with continuous or repeating subunits. The unique and strong molecular structure of polymers provides them with stiffness and flexibility and that's why they are seen to be used in many of the useful things in our everyday life. Epoxy resins contain a unique element called epoxides which are an extremely reactive type of element that hardens by the passage of time through undergoing different reactions. These reactions occur by either heating it up to a certain temperature or by mixing it with different substances.

By undergoing the process mentioned above, the epoxy becomes stiff and hardens itself. Such properties of epoxy are used in fusion bonded epoxy coating applied on pipelines to offer resistance from corrosion of elements for a long period of time and it acts as a barrier in tough types of temperatures (-30C /-22F).

At normal conditions and temperatures, the resin and chemical compounds won't get stiffer or harder and will remain normal in the form of powder. The powder is heated at 180-250C and it then changes into liquid form. The liquid form is then applied to the steel pipe on which it becomes hard and will become a solid coating on the pipelines to protect it as much as possible. The whole process is called fusion bonding and the chemical reaction that happens during it is pretty much irreversible. 


 

·         Dual-layer FBE

This is the same as the previous Fusion bonded epoxy coating but the number of coatings is doubled in this method. Rather than one coating, a double coating is applied for maximum protection from corrosion underground. Here is the job of both layers in the coating:

1.      Layer 1 is known as a corrosive protective layer and you would've already guessed its job by the name. This layer provides brilliant protection against corrosion to ensure longevity of the pipelines. The FBE can build a great bonding with the steel pipes for a solid and stiff coating

2.       The second layer contains a coating of polyester, FBE or some other coating. It is commonly known as an abrasion resistance overcoat and its job is to act as a barrier for protecting the fundamental coat of FBE from any kind of abrasion or physical harm.

 

·         Poly glass coatings

This coating is produced by using special type of micro flakes and ECR glass. ECR glass flakes provide a much better quality and resistance than standard glass flakes and it becomes a very unbreakable and resistant coating while being in the junction to enhance the life and health of the pipelines.

The main reason behind the invention of Polyglass was to invent a spray applied protective coating. As time passed, it changed and became useful in the industrial side of world and is now used as a very protective coating for pipelines and usually it is applied by using spray. A primer isn't usually brought into use unless a logistics demand appears.

Polyglass can be used on multiple types of pipes like steel and concrete pipes for a strong and firm coating. This coating is usually preferred and used a lot because of its easy application and less time consumption of the process of coating. To apply the coating, you will have to make the pipeline ready and then apply the coating on it. For an extra coating, wait for 72 hours before applying the second coat. 



 

 

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