Las arc welding is one way of connecting metal by means of an electric arc flame that is directed to the metal surface to be joined. In parts affected by the electric arc will melt, so the electrode that produces an electric arc will melt at its end and propagate continuously until it runs out.
The molten metal of the electrodes and of some objects to be joined is mixed and fill the gaps of the two metals to be joined, then freeze and connect the two metals.
The electric arc welding machine can carry large electric current but with a safe voltage (less than 45 volts). The electric arc that occurs will generate high enough heat energy that will easily melt the affected metal. The amount of electric current can be adjusted according to the need with respect to the size and type of electrodes.
Engineering Welding 2G pipe is welding horizontal position, that is padap padaposisi upright and welding is done horizontally around pipe. Welding of horizontal position of horizontal is because the weight sendirimaka welding liquid will always down. The position of the angle of the electrodeproplication of the 2G pipe is 90º. The length of the electrode movement is between 1-2 times the diameter of the electrode. If terlalupanjang can lead to poor quality of welding.