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Seam normalizing and full body annealing


EFD Induction offers seam annealing of tube welds and full body annealing of both magnetic and non-magnetic tube products. We also provide integrated induction annealing solutions for steel strip and wire production.


Induction annealing has many benefits. The heat is generated directly in the material, leading to high efficiency and low energy costs. It is also a fast and controllable process, which will improve your throughput. And the heat is very accurate—crucial to meet today's stringent quality standards.


The right heat in the right place reforms the material structure and reduces internal stresses in just the way you want.

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Seam normalizing




Sinac - Universal heat generators


Universal heat generators


Choosing Sinac gives you more than the market's most advanced, most reliable induction heating systems. You also get easy access to EFD Induction’s global service, training and spare parts network. This network—which is made up of manufacturing plants, service centers and local representatives—means you are never far from qualified help and support.  


Opting for Sinac also ensures you get the best possible solution tailored to your specific needs and conditions. Prior to designing your system, our engineers, metallurgists and material experts assess your requirements. Testing and computer simulation at our labs guarantee you receive equipment which is optimized to your applications and which can be painlessly integrated into existing production lines and processes.  





To learn more about Sinac please download the brochure or contact your nearest EFD Induction office. 
  Sinac Universal heat generators


Induction coils

Having the right coil—and keeping it in the best possible condition—is critical to the efficiency of your induction solution. After all, the coil is the component that actually delivers the heat to the workpiece.


Our induction coil services cover all your coil needs: from coil design through to coil manufacture, installation, maintenance, repair and replacement.


Coil design

Correct coil design is essential to cost-effective induction heating. This service ensures you get design customized to your heating applications and materials. Which, in turn, means that you get the right heating patterns and your induction heating power supply delivers maximum output. You can use the service when introduction induction heating for the first time, or when upgrading existing coils. 


Coil database

Each EFD Induction coil is documented in a database containing all essential information. This makes it quick and easy for us to repair and replace your coils with constant quality. You can use the service when introducing induction heating for the first time, or when upgrading existing coils.


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Wyżarzanie indukcyjne

Tube and Pipe Annealing

EFD Induction has developed a range of full body and seam annealing systems to meet your specific requirements. Common areas are annealing of high-grade steels and pipes produced according to different specifications such as API.


There are many advantages to choosing EFD Induction for tube and pipe annealing. These include: a constant power factor at all power levels, quick lifting of coils to avoid damage, continuous electronic automatic load matching, no need for operator intervention when changing tube size or wall thickness.


Within seam annealing there are two more smart EFD Induction solutions worth looking at in more detail: Traveling seam annealing and orbital seam annealing.


Traveling seam annealing moves the induction coils horizontally across the seam of the pipe seam. This ensures a uniform temperature all the way out to the ends of the pipes, thus minimizing waste.


With orbital seam tracking, an optical camera ensures constant heating of the weld. The camera simply follows the seam along a white tracking line painted on the pipe, and compensates for positional changes by rotating the induction coils (+/- 15°).


In-line seam normalizing systems from EFD Induction—a proven way to meet oil and gas pipe standards.