Chairman of the Supervisory Board of KZESOHero of UkraineYaroslav Mikitin

KZESO began manufacturing electric welding equipment in 1959. In the early 1960s, the Paton welding school developed the first K155-type mobile flash-butt rail welding machines, and commercial production based on these developments was mastered by KZESO. In 1964, a research, design and technological bureau connected with the E.O. Paton Electric Welding Institute was established at the plant, helping shorten the path from welding research and engineering development to industrial equipment.
Further generations of mobile and stationary rail welding machines followed. Published research from the Paton welding school documents the continuing development of KZESO-manufactured equipment for continuously welded rail, high-strength rails and demanding field applications.

For our customers, this heritage has practical value: KZESO does not approach rail welding as a single machine design. We approach it as a complete technological process that must work reliably in real railway conditions.

Continuously welded rail places exceptional demands on the welding process. A welded joint must combine strength, geometry and repeatability while being produced under demanding industrial or field conditions. The quality of the result depends on the complete process — not on one component alone.
That is why KZESO develops the welding system around the joint: rail clamping and alignment, continuous or pulsed flashing, upsetting, flash removal, hydraulic performance, cooling, power supply, programmable control and weld data recording. Depending on the application, these functions are integrated into a mobile welding machine, a stationary machine, a containerised system or a complete road-rail welding complex.

KZESO rail welding machines and complexes have accumulated operating experience in more than 100 countries. Historical KZESO records report more than 2,500 rail welding machines across five continents, while independent railway-industry coverage has also highlighted the company’s international deployment.
This global experience matters because rail welding projects differ by rail profile, standards, climate, track geometry, operating environment and required level of mobility. Decades of field use have shaped KZESO’s approach to machine design, project-specific integration and technical support.

KZESO equipment has been supplied and commissioned for railway operators, contractors and industrial rail-welding facilities across Europe, North America, Asia, Australia, Africa and the Middle East.
The selected projects below illustrate different ways KZESO technology has been applied in real railway infrastructure and rail-production environments.

Our current work combines decades of specialised rail welding experience with modern engineering, digital process control and project-specific system integration. From an individual welding machine to a complete mobile complex, KZESO continues to deliver equipment for new railway construction, track renewal, maintenance and industrial rail welding applications.

KZESO also maintains an active international presence by attending major railway and transport industry exhibitions around the world. These events give us the opportunity to meet customers and partners, discuss upcoming infrastructure projects and stay close to the changing technical requirements of the global railway market.

Specialised rail welding experience since 1959

More than six decades focused on electric welding equipment and the practical challenges of joining railway rails.

Paton engineering heritage

A long-standing historical connection with the E.O. Paton Electric Welding Institute and the development of mobile flash-butt rail welding technology.

Operating experience in 100+ countries

Equipment proven across different rail networks, climates and operating environments.

From welding head to complete system

One product architecture covering welding heads, complete machines, containerised systems and mobile road-rail welding complexes.

Digital process control and weld traceability

Programmable control and weld data recording support consistency, monitoring and documentation.

Project-specific engineering

Equipment configuration can be matched to the rail profile, welding task, operating conditions and required level of system integration.

Technical support in the field

KZESO supports customers with selection, commissioning, inspection, consultation and after-sales service.