Concentric Reducer Finetron® 0.40 µm, 316L
Finetron® Tube, 316L, 0.40 µm
Dockweiler Microelectronics catalogue
Finetron® range, Dockweiler – High Purity tubes and fittings for microelectronics
The Finetron® range is designed for conveying high purity (HP) gases in the semiconductor and photovoltaic industries.
It meets the requirements of electronic component production, process gas supply and pure chemical supply for electronics applications.
Surface finishes
| Finish | Internal Ra | External Ra |
| Bright annealed OD ≤ 2″1/2 (63.5 mm) | Ra ≤ 0.40 µm (16 µin) | Ra ≤ 1.0 µm (40 µin) |
Tubes and fittings prepared for orbital welding. Cleaning and inspection according to ASTM A632 S3. Degreased for gas service in accordance with CGA G-4.1-2018 and ASTM G93.
Material
AISI 316L stainless steel with controlled sulphur content, ensuring optimal orbital weldability and purity control in high-purity environments.
Maximum hardness: 180 HV (DIN EN ISO 6507-1) / 90 HRB (DIN EN ISO 6508-1).
Dimensional standards
The range is available in the Imperial system (ASTM A269 / A270 / A632).
Seamless tubes up to 1″ OD, welded from 1″1/2 OD.
Standard length: 5,900 to 6,090 mm
Traceability and packaging
Each component is supplied with its 3.1 material certificate according to DIN EN 10204.
Tubes and fittings are permanently marked: Dockweiler reference, DW number, dimensions, material grade, heat number. Tubes are ink-marked along their full length, fittings by needle or laser marking.
Tubes and fittings are capped with transparent PE caps and individually packed in sealed polyethylene sleeves. Batch label on the sleeve with full Finetron® traceability.