Russia-based TMK Group has delivered its first commercial batch of large-diameter pipes (LDP) produced using hybrid laser-arc welding (HLAW) technology. The pipes are intended for the repair of a main gas pipeline.
The shipment includes 1,420 mm diameter pipes with a 15.7 mm wall thickness and K60 steel grade, supplied to Gazprom Transgaz Surgut. The pipes were manufactured at the Vysota 239 shop in Chelyabinsk in line with Gazprom’s technical requirements and feature internal smooth and external polyethylene coating.
The development was carried out under the scientific and technical cooperation program between TMK and Gazprom, with production enabled by a newly commissioned welding mill. The technology allows the production of pipes from high-strength steel grades up to X120.
According to TMK, pipes produced using HLAW offer high strength, minimal geometric deviation and weld properties close to base metal, ensuring reliable performance in harsh environments, including low temperatures and seismic zones.
The product has undergone full certification and testing, including laboratory, pneumatic and hydraulic trials.
TMK Group is one of Russia’s leading pipe producers, with total capacity of around 4.6 mln tons per year, producing seamless and welded pipes for oil and gas applications.
