Automatic seam welder is a new product designed for pipe industries. This new design represents an important development in the structure associated with the original semi-automatic seam welder, which provides different diameter changes, ensures weld seam quality, enhances excellent performance of automatic seam welders and asks for easy maintenance. The welder employs advanced microprocessor control systems to guarantee its high quality and make application convenient, aiming at producing special tube manufacturing machinery qualified for China’s marketing.