Next to the welding technology development and progress depends on the welding electrodes ,clamp, wire feeder, running gear and other equipment of the technological maturity and the stability of welding process performance. Pipeline projects under a variety of welding technology mainly to two factors.
4.1 Project environmental conditions

Poor environment in some areas, limiting the application of advanced welding technology. For example, some water network areas, due to air humidity, drying of welding consumables, storage, use of demanding multi-site welding arc welding with welding rods, because the fiber electrode with low hydrogen type electrode than in the pores under the same conditions produced tendency to small. On the other hand, the construction site water network zone, automatic, semi-automatic welding equipment use more difficult, and manual welding the welding clamp is small, flexible operations, the mechanical properties to meet the premise of the weld can be selected based on practical welding field conditions methods. 4.2 The technical condition of tooling equipment
Advanced automatic, semi-automatic welding equipment will greatly improve the welding efficiency, despite the huge investments required to renew their equipment, but in the long-distance pipeline construction peak time, the market rate of return is substantial. Only have the technology, only with the market.

keywords: Tungsten Electrode