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Standards for precision tubing

We manufacture to the measure of your design, under international standards (H1 subtitle)

We are manufacturers of small-diameter welded and calibrated steel tubing, and we speak the language of the international EN, ASTM, SAE and JIS standards. But a standard defines a common minimum; your design is almost never a common minimum. That is why we start from your drawing, not from a catalogue: we manufacture the exact size and specification your part needs, and we certify them.

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Standards for precision tubing
EN 10305-2EN 10305-3EN 10305-5ASTM A513SAE J356SAE J525 / J526JIS G3445
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Before the standard, your design: what Delmàs can manufacture

Standards are useful: they are the common language that lets an engineer in Zaragoza, Stuttgart or São Paulo ask for the same thing and understand one another. But a standard describes a range of what is possible, not the specific part you need. And that is where our work begins.

As a manufacturer —not distributors of a closed catalogue— we do not start from what is in stock, but from what your drawing calls for:

The exact size, not the nominal oneThe market standard offers 8.00 mm; if your design works with 8.25 mm, we manufacture 8.25 mm. We adjust outer diameter, inner diameter and wall thickness to a hundredth of a millimetre, the size that makes the bearing fit, the cable pass or the guide slide as you calculated.
Bore and outer diameter at onceWe control both faces of the tubing simultaneously, so the part arrives in tolerance with no subsequent machining operation.
Whatever shape is neededAs well as the round section, we manufacture non-circular profiles —square, oval, flat oval— and decorative finishes, when the design calls for them by function or aesthetics.
The finish resolved at sourceBright outer surface ready for direct chrome, zinc or brass plating, with no prior polishing.
From tubing to finished partIf you need it, we do not deliver tubing: we deliver the component cut, bent, punched, threaded, machined and finished, ready to assemble.
The batch the big players turn downWe manufacture the small and medium quantities the large steelmakers will not take on for lack of volume: exactly what the prototype, the short run and the spare part demand.

In short: the standard is the starting point, not the limit. We adhere to it when your specification cites it, and we go beyond it when your design requires it. If your part does not fit any catalogue size, it is probably exactly the job we are best at solving.

Send us your drawing or specification
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What Delmàs does

Since 1956, in La Roca del Vallès (Barcelona), we manufacture small-diameter welded and calibrated steel tubing (⌀ 3–25 mm), in three ranges that cover the different technical requirements:

PREMIUMBright outer surface for direct electroplating (the tubing that is seen and chrome-plated).View page OPTIMSimultaneous control of bore and outer diameter, with an internal weld bead ≤ 0.15 mm (the tubing of mechanisms that slide and turn).View page PRECISEMirror-finish bore, an alternative to seamless tubing at low pressure (the tubing of fluid conduction).View page

All of it backed by an in-house laboratory at the plant and manufactured with 100% renewable energy since 2006. And all of it in conformity with the international standards your sector requires.

Why Delmàs

Why manufacture with Delmàs

A manufacturer, not a distributor. We start from your drawing, not from a catalogue: the exact size, to a hundredth of a millimetre.
The language of the international standards, EN, ASTM, SAE and JIS, so your specification is met whoever asks for it and in whatever market.
Honest about scope. We meet the standards for precision welded tubing and we say so precisely; we do not claim the ones that do not apply to us.
In-house laboratory that backs every certificate with real batch data.
Since 1956, a family business, with manufacturing that is 100% renewable since 2006.

Your design calls for a size, a shape or a specification the standard catalogue does not give you. Send us the drawing or the specification. Our technical team confirms what we can manufacture, in which range, under which standard and with which certificate, and prepares a physical sample before you commit to a production run.

Send drawing or specification
Technical inquiry

Tell 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

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