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Precision welded and calibrated steel tube made to measure
Desde 1956, Delmàs fabrica tubo de acero soldado y calibrado de precisión en diámetros de 3 mm a 25 mm. Tolerancias muy ajustadas, superficies cromables y suministro en largos habituales, en rollo o cortado a la medida que necesite.
Su socio técnico especialista en diámetros pequeños (3–25 mm) que fabrica el tubo en la medida exacta que exige su aplicación o producto.
Precision Tubes
- GAMAS
Three ranges of precision steel tube. A solution for every technical need.
Each range resolves a specific technical problem. Choose the one that fits your application or consult our technical team for advice.
- GAMA Premium
- GAMA Optim
- GAMA Precise
GAMA Precise
Smooth, bright inner bore (mirror finish). Technical and cost-effective alternative to seamless extruded tube.
Diameter
- ⌀ 8 – 25 mm
Standard
- EN 10305-2
- ASTM 513-T5/T6
- JIS G3445
Sectors
GAMA Optim
Rebaba de soldadura interior ≤ 0,15 mm. Diámetros exactos al décimo (ej. 8,1 mm). Giro silencioso y cero holguras en ejes y ruedas.
Diameter
- 3 – 10mm
Standard
- EN 10305-3/2
- SAE J525
- SAE J356
- ASTM 513-T4
Sectors
GAMA Premium
Superficie brillante sin porosidad. Cromado y zincado directo sin pulido previo. Elimina rechazos visuales y ahorra proceso.
Diameter
- 3 – 13 mm
Standard
- EN 10305-3
- ASTM 513-T2/T4
- SAE J526
Sectors
Más allá del tubo
tres evoluciones que convierten el material en la pieza que necesitas
El tubo es el punto de partida. Delmàs puede ir más lejos: añadir elementos decorativos, cambiar la geometría de la sección o transformar el tubo en un componente terminado listo para montar. El cliente envía el plano. Nosotros fabricamos.
- GAMAS
- Premium | Optim
Decorative evolution (PREMIUM and OPTIM ranges)
El tubo de acero no tiene por qué ser liso y uniforme. Podemos incorporar elementos decorativos directamente en el proceso de fabricación — sin operaciones adicionales en la planta del cliente. Líneas en espiral, serigrafía, texturas, acabados mate en lugar de brillante, marcas o referencias grabadas en la superficie. La decoración no es un paso posterior: sale integrada desde fábrica. Disponible para las gamas PREMIUM y OPTIM, donde el control de la superficie exterior es parte del proceso.
- GAMAS
- Premium | Optim | Precise
Shape evolution (PREMIUM, OPTIM and PRECISE ranges)
The tubing does not have to be round. From our precision manufacturing process, we can produce square, rectangular or oval cross-section profiles — maintaining the same dimensional control and surface finish that defines each range. The special section is not a catalogue variant: it is manufactured to order according to the customer's design requirements. Available across all three ranges.
- GAMAS
- Premium | Optim | Precise
Integral evolution — tubing transformed into a finished part (PREMIUM, OPTIM and PRECISE ranges)
Tubing transformed into a finished part
El paso final de la cadena: el tubo de acero de precisión transformado en el componente exacto que el producto final necesita recibir en la línea de montaje. Corte a medida, curvado con radio controlado, punzonado, conificado de extremos, mecanizado de rosca. El cliente manda el plano con las especificaciones. Delmàs fabrica, transforma y entrega la pieza terminada, lista para montar directamente — sin operaciones intermedias, sin proveedores adicionales.
The result is a simpler supply chain, fewer handling steps and less risk of error or damage to the component.
Precision steel tube solutions for your industrial sector
Technical applications: we identify the problem, we find the solution
Axles & Rotation
Gas Springs
Galvanic Finishing
Fluid Lines
Structures and mechanisms
Why the world's most demanding manufacturers choose Delmàs
Manufacturing precision welded and calibrated tube at 3–13 mm is not complicated — it is extremely difficult. Small diameter welding fails where standard industrial processes give up. We have been solving that exact problem for 65 years.
90% of tube suppliers only sell what they have in stock. We manufacture what you need. Odd diameters (7 mm, 9 mm), exact sizes to the tenth (8.1 mm), limit wall thicknesses (1.1 mm). Without punishing minimums.
We don't sell tube — we co-design the solution. We send physical samples for validation on your line, issue signed technical specification sheets and deliver a product certificate with every order. Trust is built with data.
Large steel mills reject small or mid-size orders with demanding technical specifications. We accept them. First sample, first pilot order, progressive ramp-up. We join your project from the prototype stage.
The specialist for difficult tube
How we work on every order
Made-to-measure manufacturing
We manufacture the tube your design requires, not what we have in stock. Exact diameters to the tenth of a millimetre — including non-standard sizes such as 7 mm, 9 mm or 8.1 mm — in ranges from 3 to 25 mm.
Supply to your format
Standard length bars from 3 to 6 m · Roll/coil for continuous line processes · Cut to exact length or machined and finished tubular part ready to assemble.
100% green sustainability
Plant operating 100% with renewable energy and solar self-consumption. It is not a paper certificate: it is a real competitive advantage for your carbon footprint reports, ESG tenders and key account audits.
65 years of know-how
Family business founded in 1956. Over six decades manufacturing precision welded tube in the same niche. The know-how accumulated in extreme small diameters is not bought or replicated.
Companies that trust Delmàs precision
Does your design need a tube that doesn't exist in the standard market? Let's talk.
Tell us your technical challenge. Our engineering team analyses your application and proposes the exact range, at the exact diameter, in the format that optimises your manufacturing process.
- Technical response within 24 hours
- Free physical sample
- No minimum quantities on first orders
- Pilot to series