Our engineering team uses the latest 3D system to develop solutions that are tailormade to our customers’ requests.

A strong understanding of the specific production steps involved as well as close cooperation with our clients ensures that all the requirements are implemented properly and swiftly.

  • 3D modelling system, CAD system.
  • Function specifications.
  • Automation concept.
  • Equipment calculation.
  • Technical and qualification documentation.



Manufacturing technology is one of the most important steps when it comes to producing a high-quality product.

  • Assembling methods of manufacturing.
  • CNC machining.
  • CNC cutting methods.
  • Bending and roll-bending.
  • Welding procedures and control.
  • Procedure for proper surface of products.
  • Final chemical treatment.



The quality of the final product begins with the quality of the base material used.
All of the equipment is designed and manufactured exclusively in high alloy materials, as:
AusteniticSteels: 1.4301 (304L);1.4404(316L); 1.4435(316L);1.4571(316Ti)
Super AusteniticSteel: 1.4539 (904L); 1.4547 (F44)
DuplexSteel: 1.4462 (SAF 2205)
Super DuplexSteel: 1.4410 (SAF 2507)
Nickel alloys: 2.4602 (C-22)



A properly selected welding process ensures the best welding and structural results.

Our skilled welders and welding personnel (IWE and IWI) provide the best solutions for optimum welding results.

RotoInox’s welding processes (WPQR) have been approved and certificated according to the PED 97/23/EC, AD 2000 and DIN EN 15614. Our welding procedures and welding personnel have been approved exclusively by TÜV SÜD.

Each welding seam is controlled using the NDT methods.


Surface treatments

The quality of the process vessel’s surfaces is determined using the appropriate grinding technique.

  • Optimal process and product safety.
  • Easier to clean.
  • Visual impression.
  • Long operating period.

Definition of the process into the process vessel, definite the structure. We can produce surfaces with a roughness of Ra<0.2 μm using various procedures ranging from dry grinding to electro polishing.


Quality Control

All products are subject to quality checks throughout the manufacturing process. The quality control process is precisely defined and comprises a variety of checks and tests:

  • basic and fillet material quality,
  • welding procedures and welding parameters,
  • surface roughness test,
  • pressure tests,
  • NDT Controls,
  • riboflavin cleanability test,
  • ferrite control.


Delta Ferite control

Chemical, energy and processing plants are often subject to heat, aggressive media and high pressure.

These circumstances require steel with high levels of resistance to corrosion and acid, even at high temperatures. If the ferrite content is too low, then the welded material is susceptible to hot-cracking; if the ferrite content is too high, the toughness, ductility and corrosion resistance of the steel are reduced.

For duplex steel, a ferrite deficit in the weld seam results in stress corrosion, cracking and reduced strength.



Vessel Cleanability

Process and product safety is guaranteed by the cleanability of the vessels’ internal surfaces, which is crucial in order to maintain the efficiency of the production process.

Each process vessel is carefully designed to provide total cleanability of all its internal surfaces, even the most hidden. After initial meetings and an assessment of the cleaning conditions, our engineers with a help of computer modelling determine the best positions and design of the spray lances.

Cleanability: the benefits

  • Optimize the cleaning process for each vessel
  • Reducing the cleaning media and cleaning time

The cleanability test is performed in accordance with the required cleaning conditions using the ribiflavin media connected with the CIP system, ensuring that the proper working parameters are controlled.