近年来，氩电联管道焊接方法在石油化工、电力建设和能源系统中得到广泛应用。与常见的手弧焊灭弧打底工艺不同，手弧焊填充盖面。
In recent years, ITU argon pipeline welding method has been widely used in petrochemical industry, power construction and energy system. Different from the common arc extinguishing and priming process of manual arc welding, manual arc welding fills the cover surface.
氩电联管道焊接是一种采用手工钨极氩弧焊连弧打底，内外送丝工艺和氩气保护的高效优质焊接技术。
ITU argon pipeline welding is an efficient and high-quality welding technology using manual tungsten argon arc welding, continuous arc backing, internal and external wire feeding process and argon protection.
容易完成高压、易燃易爆等一些重要管道的单面焊双面成型工艺，因此它首先在石油化工电力等能源行业得到使用。
It is easy to complete the single-sided welding and double-sided forming process of some important pipelines such as high-pressure, flammable and explosive. Therefore, it is first used in energy industries such as petrochemical and electric power.
通常氩电联是氩弧焊打底手弧焊盖面，氩弧焊完成后，直径小于80毫米的管道可以用氩弧焊填充和盖面，技术上称为全氩焊接。如果80 毫米大直径的管道全部使用全氩，时间周期长，会造成材料成本高，因此不会突显氩弧焊效率高的优点。因此，一般情况下，大、中直径管道在氩弧焊后用小直径焊条填充和盖面。
Generally, argon ITU welding is argon arc welding for backing and manual arc welding for covering. After argon arc welding, pipes with a diameter less than 80mm can be filled and covered with argon arc welding, which is technically called all argon welding. If all 80mm large diameter pipes use all argon, the time cycle is long, which will cause high material cost, so it will not highlight the advantages of high efficiency of argon arc welding. Therefore, in general, large and medium diameter pipelines are filled and covered with small diameter electrodes after argon arc welding.
氩电联使用的工具和设备：氩弧手弧焊机两用机、氩弧焊机，或直流焊机加氩弧焊把。该气体通常需要纯度大于99.9％的工业氩气，氩气减压表安装在氩气瓶上，保护气体可以开启到15L左右。焊丝采用直径为2.0、2.5、3.2等，通常使用2.0和2.5。钨极也叫钨针，一般选用铈钨，直径分别为2.0和2.4等，根据管道尺寸选择合适的钨极。此外，末端应研磨成30度圆锥。如果没有锋利的钨电极，热量就不会集中，所以钨电极要磨好。将钨极放入焊把，伸至喷嘴3 ~ 4mm，电流根据管壁选择，一般在70A ~ 130 A之间，选择直流正极连接。
Tools and equipment for argon ITU: argon arc hand arc welder, argon arc welder, or DC welder plus argon arc welding handle. This gas usually requires industrial argon with purity greater than 99.9%. The argon pressure reducing gauge is installed on the argon cylinder, and the shielding gas can be opened to about 15L. Welding wires with diameters of 2.0, 2.5, 3.2, etc. Usually 2.0 and 2.5 are used. Tungsten electrode is also called tungsten needle. Cerium tungsten is generally selected, with diameters of 2.0 and 2.4 respectively. Select the appropriate tungsten electrode according to the pipe size. In addition, the ends shall be ground to a 30 degree cone. If there is no sharp tungsten electrode, the heat will not be concentrated, so the tungsten electrode should be ground well. Put the tungsten electrode into the welding handle and extend it to the nozzle for 3 ~ 4mm. The current is selected according to the pipe wall, generally between 70A ~ 130a. DC positive connection is selected.