medium and heavy steel parts

technical office R&D

We do a technical review and evaluate customer specifications:

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Specifications of required materials.

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Specifications of painting procedures.

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Required Welding qualifications.

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Non-Destructive Test (NDT) procedures.

Using customer’s drawings we produce our own constructive and assembly plans necessary for the manufacturing process.

We work on drawings of parts or assemblies of all kinds using 3D software applications.

The assembly sequence of parts is made taking into account always the deformations and contractions usual on welding processes.

assembly

Perpendicularity and parallelism

Accessibility for inspections

Previous machining

Preparation of welding joints

welding sequences

Deformation of the welds

At Juan Lasa all the parts assembly are made taking always into account the final machined part drawings.

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The previous operations are clearly identified in the documentation generated by our technical department to avoid possible errors. We pay special attention to pre-machining operations, welding sequence, accessibility, etc.

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We always check all the measurements and the excesses. We assure the geometry of the welded part.

welding and NDT Inspections

Decades of experience in submerged arc welding (SAW), offering robust, uniform and high penetration welds.

Welding Procedures:

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WPQR:

Welding procedure Qualification record according to UNE EN ISO15614, ASME and AWS standards.

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WPS:

Manufacturer’s welding specifications.

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Qualified Welders and Welding Operators.

We have certified technicians, accredited by CERTIAEND level II, qualified to generate reports in the three types of tests.

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These tests use different techniques such as Magnetic Particles (MT), Penetrant Liquids (PT) and Ultrasounds (UT).

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Bonding weld 100% of thickness.

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During the manufacturing process, we can perform weld inspections through non-destructive testing.

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We also provide industrial radiographs (X-rays or gamma).

Design of the weld joint binding 100%

Start and end of welding outside the customer’s part

Result: Customer part without impurities

Shot blasting

We apply shot blasting to remove surface impurities from industrial sheets, and also those produced during the oxygen cutting and manufacturing process. The oxide generated during the heat treatment is also removed.

Painting

The application of the printing paint after the shot blasting process allows adequate protection of the workpiece surface. The quality and thickness applied are those requested by the customer.

Transport

We also offer regular transport services throughout Europe with the best international agencies, including special transport.

Stabilized welding - Heat treatment

After the stresses generated by the welding, we manage its stabilization to eliminate them, by techniques of THERMAL TREATMENT and STABILIZED BY VIBRATION.

Finishing operations

Depending on customer’s specifications, parts can be subjected to complementary processes such as screw re-profiling, surfaces polishing, application of grease coatings for surface protection, etc.

Parts Machining

If the customer requests machining the part before expedition we, at Juan Lasa, have a long and close relationship with the best local machining companies, offering the best ratio Quality/Price.