Manufacturing for High-Tech Industries

years of experience

industrial workshops

0 m²

employees

repeat customers

of revenue allocated to R&D

0 %

Through its Manufacturing Division, Onet Technologies offers its customers comprehensive engineering solutions,ranging from preliminary design to deployment at industrial sites.

To strengthen its capabilities in the most demanding industrial projects, Onet Technologies acquired SDMS – La chaudronnerie blanche, a leading player in mechanical welding and fabrication of noble and rare metals, and subsequently Fromeca, a specialist in precision machining.

With more than 60 years of experience, Onet Technologies and its subsidiaries support major industrial clients in the design and manufacture of complex equipment intended for environments subject to stringent technical, regulatory, and safety requirements.

With our expertise in specialized materials, vacuum and ultra-high vacuum technologies, cryogenics, and advanced welding processes, we work on high-value-added projects for the nuclear, aerospace, scientific research, and chemical industries.

Our Areas of Expertise

SDMS provides its customers with comprehensive expertise, from design to the manufacture of custom industrial equipment.

Technical Metal Fabrication

SDMS supports manufacturers in the design and fabrication of custom-made fabricated metal equipment for the most demanding environments. Thanks to its expertise in white metal fabrication and its mastery of technical materials, the company meets the specific needs of its customers by ensuring reliable, high-performance solutions that comply with the regulatory requirements of their industry.

Quality Controls and Inspections

Because equipment reliability is a major concern for its customers, SDMS places quality at the heart of its organization. Rigorous checks are conducted at every stage of the manufacturing process to ensure that products comply with regulatory, standards-based, and contractual requirements. This approach ensures a high level of quality and safeguards even the most sensitive projects.

Vacuum and Ultra-High Vacuum Technologies

SDMS offers high-tech solutions that incorporate vacuum and ultra-vacuum technologies for applications requiring high levels of performance. With its proven expertise in this field, the company works with its customers to develop custom equipment for the research, aerospace, aviation, and advanced technology sectors.

Mechanical Welding

From design to manufacturing, SDMS applies its expertise in mechanical welding to complex industrial projects. The teams design and produce high-value-added welded assemblies tailored to the technical requirements of each application. This expertise enables the company to offer robust, durable solutions that are perfectly tailored to customers’ needs.

High-Tech Welding

SDMS’s expertise in TIG, MIG, and plasma welding processes enables the company to meet the requirements of even the most complex projects. Our teams work with a wide variety of materials and technical alloys to ensure high-quality welds. This expertise is a major asset in industries where safety, traceability, and performance are critical.

Cryogenics

SDMS designs and manufactures equipment suited for cryogenic environments. The company works with its customers to develop reliable, high-performance solutions capable of meeting the specific challenges posed by extremely low temperatures and the most sensitive applications.

Highly Demanding Fields of Work

SDMS's expertise meets the needs of industries where performance, reliability, and compliance are essential.

Nuclear

Manufacturing of equipment for nuclear facilities and energy infrastructure.

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Aeronautics and Space

Design of equipment for aerospace programs, space programs, and test facilities.

3D rendering of a nuclear submarine moving underwater.

Defense

SDMS manufactures tanks (liners and double-walled H₂ vessels), nuclear containment packages and containers, as well as reactor vessel and reactor core internals.

Scientific Research

Contribution to cutting-edge research projects requiring advanced vacuum, ultra-high vacuum, and cryogenic technologies.

Chemistry and Industrial Processes

Manufacturing of specialized equipment for complex chemical and industrial environments.

Industrial Capabilities to Support Your Projects

Within Onet Technologies’ Manufacturing Division, the SDMS teams draw on more than 10,000 m² of industrial workshop space and an in-house engineering department to help carry out complex industrial projects, from design through manufacturing.

This expertise enables Onet Technologies to offer custom-designed equipment suited to the most demanding environments, drawing in particular on its expertise in materials such as stainless steel, aluminum, copper, titanium, zirconium, and various engineering alloys.

1. Research and Design

In-house engineering department to develop tailored technical solutions

2. Industrialization

Process design and optimization to ensure quality and performance

3. Manufacturing

10,000 square meters of workshops equipped for sheet metal fabrication, welding, and assembly

4. Audits and Inspections

Non-destructive testing and inspection in compliance with regulatory requirements

5. Delivery of Equipment

Shipment management and support through to commissioning

Our Expertise

Code and Welding Expertise

Building Code

CODAP, EN-13445
RCC-MRX, RCC-Mx, RCC-M
ASME VIII

Commonly Used Regulations

ESP (97/23/EC and 2014/08/EU)
ESP-N (Decree of December 12, 2005)

QS and QMOS-Certified Facility

Welding

Automatic/Manual TIG-MIG Welding
Orbital TIG Welding
TIG Welding Power
Plasma Welding
Solid-Wire Submerged-Arc Welding
Electron Beam Welding
Vacuum Brazing

Nearly 1,200 certified welding qualifications

Surface Treatments

Chemical treatments (passivation, UHV cleaning, etc.)
Mechanical treatments (polishing, microblasting, etc.)
Heat Treatments for Stress Relief

Non-Destructive Testing

Dimensional Inspections
Leak Tests: Pressure, Vacuum Using Tracer Gas (He)
RGA (Residual Gas Analysis) Testing
Penetrant Testing
X-ray Examinations
Endoscopic Examinations
Hydraulic Tests

COFREND I and II Certified Agents

Certifications and Quality Requirements

SDMS relies on a management system that ensures the quality, safety, and compliance of its projects.

Do you have a project that requires expertise in technical sheet metal fabrication or mechanical welding?

The SDMS and Onet Technologies teams are here to assist you in the design and manufacture of your complex industrial equipment.

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Manufacturing