Electropolished Pipe Clamps — Ra ≤ 0.4 µm Surface Finish
Bioprocessing-grade electropolished clamps for pharmaceutical, semiconductor and high-purity applications.
Surface finish on the clamp-pipe contact face determines whether bacteria can colonise the interface during CIP. NIBRO electropolished clamps deliver a controlled, measured Ra ≤ 0.4 µm finish on the clamping face — the same purity envelope as the wetted pipe.
Why surface finish matters at the clamp
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.
NIBRO EP spec
• 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.
Industries served
Pharmaceutical WFI/PW distribution · Vaccine production · Cell therapy bioreactor piping · Semiconductor ultrapure water (UPW) headers · Wet etch chemical lines · Microelectronics cleanroom skids.
Take this spec sheet into your next design review
NIBRO-branded A4 PDF — printable, with QR back-link and recommended products table.
8 clamps that fit this application
diepe kapbeugel 20x316
diepe kapbeugel 20x -316
diepe kapbeugel 25x316
diepe kapbeugel 30x316
diepe kapbeugel 40x316
diepe kapbeugel 25x -316
diepe kapbeugel 50x316
DIN1593 diepe kapbeugel 50x316
Frequently asked
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Talk to our engineering team. Factory direct from Oisterwijk, Netherlands.