Precision Tubes

We manufacture high-precision carbon steel tubes and stainless steel tubes with the highest quality standards and state-of-the-art R&D.

Sales in 26 countries

Leaders in high-precision carbon steel and stainless steel tubes

We achieve an extensive experience in the tube industry offering a wide range of products, from high-precision carbon steel tubes and stainless steel tubes manufacturing, to disc and laser cut-to-size processes.

We guarantee an extraordinary superficial quality and thickness regularity, improving the mechanical properties conferred by the elongated grain over the equiaxial grain and the possibility to manufacture materials with reduced thickness tolerances.

History

Gonvarri Precision Tubes was born in 2018 with the acquisition of Flinsa and its incorporation into Gonvarri Industries’ structure as a new business line for steel processing.

Products

Carbon Steel Tubes

Cold calibrated and welded steel tubes for precision applications. We produce welded and cold-gauged steel tubes. According to standard EN 10305-3/-5 and Supply condition +CR1/+CR2.

Precision applications

Gonvarri Precision Tubes has several tube manufacturing lines that use HF (High Frequency) induction welding technology. The high quality standard of the products manufactured by GPT is the result of 30 years of experience and has recognised prestige both nationally and internationally.

Specialisation

Gonvarri Precision Tubes is positioned as a leader in the hardened tube sector, due to the advanced technology used. Thanks to their electro-magnetic induction quenching facilities that provide a high degree of homogeneity to the product, GPT offers a tube that maintains excellent toughness with resistance greater than 1.400 MPa.

State of the art steel tubes

Advanced High Strength Steels (AHSS) are the latest generation of steels that offer an effective solution to optimising weights and strength in most demanded parts and those with high requirements in shock energy absorption, especially in the automotive sector.

Their cost is offset by the possibility of mass reduction, which makes them a technologically highly competitive solution.

Tubes for hydroforming

We provide the best precision tubes and we are specialists in tubes for hydroforming, one of the most demanded tubes on the market. Hydroforming is a very aggressive process to obtain complex shapes from round tubes.

Hardened tubes

Induction hardening is based on heating the material by passing it through a high density magnetic field. The heating penetration is a direct function of the working frequency.

Precise control over this frequency ensures perfect hardening homogeneity throughout the section. The use of Mn-B alloyed steel grades guarantees a high level of impact energy absorption, a property of vital importance in some parts, such as the anti-intrusion reinforcements of vehicle doors.

Finitube®

GPT manufactures Finitube with great technical care from the beginning to the end of the process, using our knowledge acquired after more than 20 years manufacturing this type of tube.

The FINITUBE® range provides the best surface finishing for those products that, due to their functionality and final use, are intended for components of high aesthetic quality, such as chrome and nickel plating, metallic paint, etc.

Ductitube®

Based on our own technology, DUCTITUBE® offers a list of optimised mechanical properties that allows the user to replace other tubes (standard/annealed) guaranteeing the required level of conformability and obtaining a relevant cost reduction.

Headrest Tube

We supply Normal E600 HRF tubes, which allow a tube bending with a medium radius and minimum deformation, while maintaining the quality of surface finish and sufficient wall thickness.

Additionally, we manufacture Extraductile E600 HRF-ED headrest tubing, which allows a double curvature with close curves and a smaller radii of curvature. Deformation and wall reduction are lower, maintaining the quality of the surface finish. The Extraductile Tube for headrests reduces wear and tear on the tooling and offers more room for maneuver by deforming it.

Products

Stainless steel tubes

We manufacture tubes of any section: circular, square, oval or rectangular, as well as special shapes made specifically to meet the most demanding needs of our clients.

Wide range

We apply state-of-the-art laser welding with minimal thermal effects and we have tube-cutting processes by saw blade with the ability to apply 100 % control to the length of the tube.

Commitment to innovation

At GPT we are firmly committed to innovation through research, an important pillar that allows us to continue developing competitive products that add value to our customers.

Some of our R&D initiatives have materialized in projects that have obtained the support of CDTI (Centro del Desarrollo Técnico Industrial, or Industrial Technical Development Center) and have given results in the registration of invention patents and the execution of integrated multi-company projects.

R&D

A complete analysis system and highly qualified staff allow the development of R&D activities, being one of the main driving forces of improvement for the optimisation of our processes and the development of new products and services. Moreover, the close relationship with our clients complements the research activity through the feedback of results and the approach of new challenges.

Quality

The quality control and certification of our products is one of our main priorities. In our research laboratory we study the crystalline structures of steels of advanced grades in order to select the most efficient steelmaking plants.

Our Brands

Experience and knowledge

The new Gonvarri Precision Tubes division has 2 production plants with a capacity of more than 150,000t/year.

Products & Processes

Steel Tubes

The new Gonvarri Precision Tubes division has 2 production plants with a capacity of more than 150,000t/year.

We manufacture tubes of any section: round, square, oval, rectangular, as well as special shapes made specifically to meet the most demanding needs of our customers.

Our manufacturing range of carbon steel tubes ranges from 8 mm to 130 mm in diameter, with a minimum thickness of 0.5 mm up to a maximum of 6 mm. In the case of stainless steel tubes we manufacture diameters up to 104 mm.

In our stainless steel tube fabrication section, we apply state-of-the-art laser welding with minimal thermal impact. We also have disc tube cutting processes with the ability to apply 100% control to the length of the tube.

In our laser cutting and drilling section, we have the most advanced processes in the market with fiber optic technology and variable speed.

We also have an induction hardening section where we obtain tubes suitable for vehicle chassis parts and especially for door reinforcement bars.

R+D

A complete analysis system and highly qualified staff allow the development of R&D activities, being one of the main driving forces of improvement for the optimisation of our processes and the development of new products and services. Moreover, the close relationship with our clients complements the research activity through the feedback of results and the approach of new challenges.

Some of these R&D activities have resulted in successful projects that have obtained the support of CDTI and have borne fruit in the registration of invention patents and the execution of integrated multi-company projects.

Innovation through research is the firm commitment of the company’s management bodies, which is why we spend a significant amount of resources on it.

Quality

The quality control and certification of our products is one of our main priorities. In our research laboratory we study the crystalline structures of steels of advanced grades in order to select the most efficient steelmaking plants.

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