Electropolished Pipe Clamps — Ra ≤ 0.4 µm Surface Finish

Bacteria preferentially attach to surfaces above Ra 0.8 µm. CIP cycles remove planktonic bacteria but struggle to dislodge biofilm from machined or as-rolled surfaces. The clamp inner face is in continuous contact with the pipe; if it has a rough surface, biofilm bridges between pipe and clamp and grows back after every cleaning.

Electropolishing dissolves the outer micrometres of the stainless surface, leaving a mirror finish with no peaks for bacteria to anchor onto.

• Base material: AISI 316L, EN 1.4404, ASME BPE certified mill.

• Process: 2-stage electropolish (acid pickle + electrolytic finish) in our Oisterwijk EP cell.

• Measured finish: Ra ≤ 0.4 µm on the clamping face. Optional Ra ≤ 0.25 µm on lead time.

• Free iron test per ASTM A380.

• Documentation: per-batch surface finish certificate.

Pharmaceutical WFI/PW distribution · Vaccine production · Cell therapy bioreactor piping · Semiconductor ultrapure water (UPW) headers · Wet etch chemical lines · Microelectronics cleanroom skids.