This comprehensive handbook covers all commercially available welding processes. It helps the reader select the best suited process for their application and provides an understanding of each process by presenting the limitations and benefits. The focus on practical aspects such as weldability, optimizing part design, troubleshooting, and testing makes this book an indispensable tool for everyone involved in welding of plastics. At the same time it also conveys the basic theoretical principles of plastic welding, such as squeeze flow, molecular diffusion, and heat transfer mechanisms.