Pipe cleaning,
the perfect preparation before pipe coating

Pipe blasting is the key process. However, in order to secure the quality of the pipe coating later on, pre-heating, dust removal, and (phosphoric) acid washing are beneficial in preparation for the coating application. Our pipe cleaning equipment is your benefit.

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As part of the cleaning process, the pipe surface is blasted to remove rust and contaminations and to create the proper surface roughness and cleanliness for further treatment. In addition to our proven concepts for external and internal blasting, we also offer several other pipe cleaning solutions. Selmers recognises that the cleaning process has a huge impact on the coating quality, so we are constantly striving to perfect the process.

  • Proven track record in factories maintaining the highest quality standards
  • Reliable equipment
  • Efficient to use
  • Built to enhance the pipe coating process

External Blasting

In the external blasting process, the pipe surface is blasted while being transported through a blast cabin. The surface blasting is accomplished by high power mechanical blast wheels accelerating abrasives with high impact against the pipe surface.

Complementary to the blasting process, additional treatments such as pipe washing, pre-heating, and phosphoric acid wash systems can be considered to achieve the proper conditions needed for the pipe coating process.

  • Pipe diameters: 1″ up to 144″
  • Ease to operate and minimum changeover time to other diameters
  • Robust design with manganese steel blast cabin
  • High power density/capacity available starting at small diameters
  • Several options for process optimization possible

Internal Blasting

In the internal blasting process, the pipe surface is blasted on the inside with a blast lance system. During this process, the rear- and front pipe-ends are positioned into enclosure cabins allowing airflow and preventing the escape of abrasives, dust and debris.

There are two main internal pipe blasting methods:

Mechanical blasting: Abrasive is launched using a mechanical blast wheel.

Pneumatic blasting: Abrasive is launched into the pipe using compressed air.

  • High power density for small diameter internal cleaning
  • Flat floor erection possible
  • Blast lances easily exchangeable
  • Pipe movement compensation
  • Special design for optimized reclaim

Pipe End Cleaning

After a pipe has been coated, pipe end cleaning is necessary to create cutbacks: the clean surface area required before welding. These cutbacks have to be free of coating materials.

Depending of the type of coating, Selmers offers several solutions like pipe end peeling, brushing, blasting and cutting systems. As an alternative, pipe-ends can be covered with masking tape prior to the application of coating, preferably by a Tape Application system for improved safety.

  • High accuracy
  • Flexibility in usage
  • Pipe bevel roll to fixate position
  • Peeling off PE/PP at an angle while leaving an FBE toe in place
  • Easily adjustable for different pipe diameters

Field Joint Blasting

Field Joint blasting is typically a time consuming manual operation and not without safety, health and environmental risks. Selmers’ field joint blaster has been developed to improve cycle times and produce identically blasted joints in terms of roughness and cleanliness.

The Field Joint blasters are based on horseshoe shape devices configured for up to four vacuum blast nozzles. Placed on a pipe by a crane, this stand-alone system is ready for use immediately.

  • High blasting capacity
  • Automated and remote controlled process
  • Operator friendly: safe, low noise and easy to operate
  • Environmental friendly by an abrasive reclaim system
  • Maintenance friendly

Offshore Blasting

As the demand for offshore joint coating quality and pipe laying speed is very high, effective and consistent blasting and coating are essential.

Selmers offers quick clamp-on joint blasters that enclose the bare joint area and can quickly blast the joint surface using either wheel blasting or air blasting. The operation is suitable for both for S-lay and J-lay vessels.

  • Including blast grit recovery
  • For all pipe diameters
  • Cleanliness up to SA3
  • Full integration
  • Quick clamp-on systems

Spoolbase Blasting

To reduce the amount of welds performed in the field, onshore or offshore, multiple pipes can be welded together in spoolbases, double-joint or multi-joint facilities.

After welding, the cutback areas need to be cleaned by blasting. These blasting systems have the same high quality standards as offshore blasting systems, however, the configuration is slightly different.

  • Including blast grit recovery
  • For all pipe diameters
  • Cleanliness up to SA3
  • Full integration
  • Quick cycle time

Wind Tower Blasting

Selmers has developed automated internal and external blasting machines for wind tower cones. Particularly the possibility of blasting internal as well as external surfaces simultaneously will present wind tower manufacturers with significant benefits. Up to this point internal surface areas could only be blasted manually, which puts a huge strain on production capacity, labour, abrasives and energy.

  • Quick return on investment
  • High capacity (upto 600 m2/hr)
  • Consistent blasting result
  • Focus on Health, Safety and Environment (HSE)

Pipe coating types

In the world of pipe coating, there are many types of coating materials, all with different characteristics, purposes and methods of application. Discover here which solutions Selmers offers for different coating principles.


In general, the coating process includes: heating the pipe, the coating application and curing/cooling of the coated pipes. For each process, we can build equipment suitable for a wide range of pipe diameters and lengths.


To process pipes, they must be transported along the machinery, work stations or buffer positions. Selmers provides a large variety of pipe handling systems to transport pipes safely and efficiently from A to B.


Nowadays robotics is an essential component in many modern manufacturing environments. Selmers develops and integrates robotic process solutions, whether it is a tailor-made solution or a Selmers robotic application.


Selmers stands for reliable equipment that can do the job. In all layers of the organisation there is a focus on quality, safety, health and environment to ensure production is optimised and risks are reduced to a minimum.


Global Services is the central coordinator for requests for information, field services, maintenance requests and spare parts. Our professionals are available to support you at any time, anywhere in the world.