Daqing Petrochemical Company has the first application of narrow-gap submerged-arc Tungsten Welding Electrodes technology to produce new hydrogenation reactor to be successful. Hydrogenation reactor according to manufacturing requirements of a meter thick, 92 mm conventional X-plate welding groove welding consumables 22 kg to be filled, and new technology uses U-shaped groove welding consumables fill only 15 kg, 68% savings welding consumables. Each weld hydrogenation reactor 80 meters can save 300 kilograms of Welding Electrodes  material.