Production of stainless-steel tubes from coils

One workcell,
two production batches

Initial situation

With excellent heat conduction, corrosion resistance and malleability properties, copper has always been the go-to material for making bent and end-formed pipes for the most common hydraulic components in HVAC systems.

However, the rising price of this material has driven many HVAC manufacturers to consider the use of bent and end-formed stainless-steel tubes. This material is stronger from the mechanical point of view, but has disadvantages in terms of production rates, geometry feasibility and resulting process quality and precision.


A system capable of processing stainless steel tubes from coil is needed to make the switch to bent and end-formed stainless-steel tubes. The system must offer high efficiency and precision as well as have the ability to make parts with particularly complicated geometries.

These factors are key in order to benefit from the cost advantages of transitioning to steel in the production of HVAC systems.


The solution

The BLM GROUP robotic workcell produces two separate batches of complex, high-precision parts, bent with mandrel and formed on both ends from a single stainless-steel tube coil.

The solution guarantees maximum efficiency because it eliminates semi-finished products to be moved or stored. It allows bending and end-forming operations to be performed on the first and second ends of the tube in parallel and it performs the dimensional checks in-line on all parts with the 4RMEASURE system.

The benefits

  • Extremely efficient and accurate processing of stainless-steel pipes, starting from coil and bent with mandrel.
  • Simplified logistics with elimination of intermediate steps and part reworking on other equipment.
  • Inline dimensional check of all parts using 4RMEASURE, the inline end-forming measurement system.
  • Achieve consistent, quality product each and every time while improving cycle times and decreasing your production costs.

Technical aspects

  • Extremely compact layout.
  • Integration of standard hardware and software systems, which can be reconfigured in the future for stand-alone use.
  • Process any material; not only aluminum and copper, but also iron and stainless steel.
  • High-quality finish of the end part, without clamping marks.
  • Production of two or more batches at the same time.