General Information

WELDING TECHNOLOGIES, LLC (OOO ''NPP ''ST'') develops and manufactures equipment for electric resistance welding of railway and tram rails, including heavy electric welding equipment as well as equipment for the needs of steel factories and undergrounds. The company develops and supplies mobile and stationary rail-welding complexes, engineered according to the latest achievements in science and technology of mechanical engineering, welding equipment and control systems.

Our Design and Technology department team has extensive experience and excellent professional skills to manage the toughest challenges and solve the most difficult tasks in various industries where electric resistance welding is required. On the basis of our company, the specialists of our customer companies as well as of other manufacturers are trained according to agreed programmes, which include theoretical and practical courses conducted on our rail-welding complexes and equipment. 

WELDING TECHNOLOGIES, LLC actively cooperates with the Russian Scientific Research Institute for Technology, Control and Diagnostics of Railway Transport. Ongoing cooperation with JSCO "RZD" (Russian Railways) and its structural subdivisions on welding equipment, spare parts and tools supplies and repairs (not only of own manufacture) allows the company to update the existing knowledge and make necessary adjustments during the machine engeneering process in order to improve customer properties and quality management system.

Key Activities of the Company

  • Development, design and manufacture of innovative heavy electric welding equipment: rail-welding container-type complexes and Combi-Road systems
  • Development and manufacture of quipment for metallurgical plants.
  • Development of equipment for resistance spot welding.
  • Development, design and manufacture of spare parts and tools for rail welding equipment.
  • Packaged delivery of welding equipment and SPTA.
  • Machining services.
  • Steel constructions manufacture (including the customised).
  • Non-standard equipment and complex technological components manufacture (including the customised drawings).

Region supplier

Certified company

Modern young company

The best on the market


Since the Europe's largest factory for manufacture of heavy electric welding equipment - TESO - was established in Pskov, in 1973, the city has become the centre for development, design and manufacture of heavy electric welding equipment.

Pskov specialists have made it possible for TESO factory to compete with the leading manufacturer of heavy electric welding equipment - PrJSC Kakhovka Plant of Electric Welding Equipment - in development, design and serial production of welding equipment complexes, lines, units and machines, ensuring mechanisation and automation of the welding processes in metallurgy, mechanical engineering and construction industries.

However, "The Perestroika" restructing period and economic recession of 1990, the lack of competent management and understanding of the market conjuncture, made adjustments, which, despite the existing knowledge and experience of technical specialists, did not allow the company to survive.

In 2018, in Pskov land, which has grown a large number of specialists in electric welding equipment production, Research and Production Company WELDING TECHNOLOGIES (OOO "NPP "ST") was established. The new company has taken into account the experience of PrJSC Kakhovka Plant of Electric Welding Equipment and TESO factory.

Moreover, the presence of experienced team management with highly qualified technical specialists (more than 80% of employees have the decades of experience at TESO) allowed young modern company to quickly but firmly take its place in the market of heavy electric welding equipment.

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