Hygienic design for chemicals, pharmaceuticals and food technology

Deburring and polishing for perfect surfaces

Tubes, pipes, housings and distributors in the chemicals, pharmaceuticals and food industries require microscopically smooth surfaces to ensure they are suitable for cleaning (hygienic design). In particular, joints with welded seams and connecting elements such as distributors, housings and connections require a perfect finish with surfaces smoothed and polished to RA≤0.38 µm to achieve hygienic design standards. The stresses involved in the bending process mean that bent tubes have insufficient surface quality levels, which can be remedied through abrasive flow machining. As a result, bent tubes can also now be used as assemblies in hygienic design.

Unlike conventional deburring methods, abrasive flow machining delivers microscopically perfect surfaces even in hard-to-reach areas such as joints, welded seams and internal channels.

Deburring with abrasive flow machining is particularly suitable for:

  • Tubes and bent tubes
  • Pipes
  • Welded connections
  • Housings
  • Valves
  • Distributors

Example: Polishing an internal surface

Rohre und Leitungen Polieren und Entgraten - Vorher Rohre und Leitungen Polieren und Entgraten - Nacher

Benefit from our deburring and polishing expertise

Stäheli AG supports you throughout the entire machining process. We produce the device for holding the workpieces and develop the formulation for the abrasive paste according to the specific requirements for your material surface. We also provide you with our expert advice and knowledge.