EN 10305-3 tubing: manufacturer of precision welded cold sized tubing
EN 10305-3 is the standard for calibrated tubing with the outer surface ready for chrome plating and the diameter controlled to fit without play. We are manufacturers of tubing conforming to EN 10305-3, with the as-supplied bright surface that goes straight to the plating bath.
What the EN 10305-3 standard is
EN 10305-3 is the European standard that sets the technical delivery conditions for welded cold sized precision steel tubes (welded cold sized). Within the EN 10305 series of precision tubing, it is the reference when what matters most is dimensional control and the quality of the outer surface: the tubing that is seen, chrome-plated and has to fit exactly into a joint.
Its cold sizing process adjusts the outer diameter and refines the surface so the tubing arrives ready for electroplating and for precision assembly.
What the standard specifies
EN 10305-3 defines, for welded cold sized tubing, the requirements for:
It is the standard behind a tubing with the non-porous outer surface —which chrome or zinc plating does not betray— and the calibrated outer diameter for precise joints and assemblies. (Exact tolerances by diameter, in the data sheet.)
Which Delmàs ranges meet EN 10305-3
It is the reference standard for the PREMIUM and OPTIM:
| Range | Diameter | Role under EN 10305-3 |
|---|---|---|
| PREMIUM | ⌀ 3–13 mm | Bright outer surface for direct chrome, zinc or brass plating, with no prior polishing. |
| OPTIM | ⌀ 3–10 mm | Simultaneous control of bore and outer diameter, internal weld bead ≤ 0.15 mm. |
Beyond the standard: we manufacture exactly the tubing you need
EN 10305-3 describes calibrated tubing; your part calls for a specific size and finish. As a manufacturer —not distributors of a closed catalogue— we start from your drawing: the exact size to a hundredth of a millimetre (8.25 mm if your fit requires it, not the standard 8.00), the as-supplied surface ready to chrome and, if you need it, the tubing transformed into a finished part. The standard is the starting point, not the limit.
Market, sectors and applications
A Europeanstandard. It is the basis of the applications where finish and fit are decisive:
- Home — lighting, kitchen and bathroom hardware, chrome-plated furniture.
- Mobility — silent mechanisms, wheel axles, exposed structures.
- Engineering / Electrical — enclosure structures and visible supports.
EN 10305-3 versus neighbouring standards
Certification
An EN 10204-2.2 or 3.1 certificate with every delivery, with full material traceability.
Why choose Delmàs as your tubing manufacturer
Does your chrome plating bring out the imperfections in the steel, or do your parts not fit the same between batches? Send us the drawing. We prepare a physical sample so you can check the finish and the fit on your own line, before committing to a production run.
Contact our technical teamTell us about your application and we'll get back to you in 24 h
We have been manufacturers since 1956. Tell us what you need and our technical team will review your case, with no obligation and no minimum order quantity.
- Technical response in 24 h
- Physical sample to your exact specification
- Cost comparison vs. your current supplier
Prefer to discuss it over the phone? +34 938 424 707