Hand down Welding Electrodes  technology and welding up compared with traditional weld quality, arc blow strong, very degree, backing weld shape when side welding, electrode melting fast deposition rate, etc., are widely used in pipeline construction. With increasing pressure transmission of oil and gas pipelines increased the strength of steel, hand-welding technology to the experience under the full Cellulose down welding - mixed down welding - next to the welding of complex development process.

keywords: welding alloys