Fabrication Techniques for Successful Orbital Tube Welding (14040)
By Barbara K. Henon, reprinted from Tube and Pipe Quarterly, Vol. 7 (1&2), 1997. The past decade has seen a revolution in piping system fabrication technology for many industries. The technology has been driven by the semiconductor industry's need to deliver process gases to the point-of-use at purity levels unheard of 10 years ago. This level of technical sophistication requires a piping system with an extremely smooth interior surface finish to prevent adherence of particulates, moisture, or other impurities to the tubing walls. The increasing demand for high-quality joining of piping systems in these critical industries in the early 1980s resulted in an increased use of portable orbital welding systems that operate on single-phase electrical power.