Internal blasting & coating plant

Internal blasting & coating plant

Internal coating or lining of pipes is a widely used technology to protect steel pipelines from corrosion and to reduce flow friction. This method is essential in long-distance transport lines, including those for oil, gas, fuel, condensate, chemicals, potable or industrial water, sewage, outfall pipes, and drilling pipes.

Depending on the specific transport medium, its aggressiveness, and other requirements, various types of coatings can be applied to provide the necessary protection:

  • Cold or Hot Epoxies: These coatings can be solvent-based or solvent-free, offering flexibility depending on the conditions of the pipeline and the substance being transported.
  • Fusion Bonded Epoxy (FBE): A powder coating that provides excellent corrosion resistance, often used in demanding pipeline environments.
  • Polyurethanes: Ideal for applications that require durable, high-performance coatings to withstand extreme conditions.

 

How It Works

Internal pipe coating is typically applied in one or more layers, depending on the pipe coating standard or manufacturer recommendations. Special primer layers may be required in certain cases. To ensure proper adhesion, the pipe surface must be clean, dry, and free from contaminants like dust, rust, and oil. This is achieved by using the following processes:

  • Internal Washing: Pipes may undergo internal washing to further clean the surface, particularly if the pipe has been exposed to dirt, oil, or grease.
  • Pre-heating: Pipes can be pre-heated to ensure proper coating application and faster curing.
  • Abrasive Blasting: To prepare the pipe surface for coating, it must be abrasive blasted to remove any impurities.

Once the coating is applied, post-heating can be used to speed up the curing process, ensuring the coating hardens properly and adheres securely to the pipe surface.

 

Key Equipment and Full Scope

Selmers provides a comprehensive range of equipment for internal pipe coating, including:

  • Internal Wash System: The internal pipe wash system is used  to wash the internal pipe surface from e.g. dust or sand, or for a pre-cleaning step to degrease the surface.
  • Internal Heating System: A gas-fired heating system is used to preheat pipes before blasting and coating, which helps dry them and prepares them for the application.
  • Internal Blasting System: This system uses dry-grit blast lances based on either mechanical or pneumatical technology to effectively remove contaminants, such as rust and mill scale, ensuring a clean surface for coating adhesion. It also includes an optional alkaline wash system for cleaning sand, mud, oil, and grease when necessary.
  • Blow-Out System: This system efficiently removes dust and loose abrasive particles from the pipe after blasting, ensuring the surface remains clean and ready for coating.
  • Internal Pipe End Masking System: This is a device that applies a temporary tape on the pipe and in order to keep the pipe end clean for later welding.

Once the pipe surface is properly prepared, the following systems are used for coating and curing:

 

Innovate better together!

By mutual learning, we have grown to who we are today. A trustworthy supplier of a multitude of automated solutions. Do you want to optimize performance and reduce risks? Send an email to sales@selmers.com or call +31 (0)251 211 999, or fill in a contact form via https://www.selmers.com/contact and we’ll get back to you.

Internal blasting and coating

Selmers offers flexible solutions tailored to your specific needs. Whether you require cold or hot epoxies, FBE, or polyurethanes, we can provide the coating system that best suits your project requirements.

  • Custom Specifications: We offer tailored solutions for any configuration in any type of building including all pipe handling equipment. From small to large diameters.

* other specifications request

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