Development of Manufacturing Technology for Electric Resistance Welded Steel Pipes with Ultra-heavy Wall Thickness

Abstract

NKK has developed new manufacturing techniques to meet the increasing need for electric resistance welded (ERW) steel pipe with heavier wall thickness and higher quality. These new advances overcome problems encountered with conventional ERW methods by incorporating new technology in forming, welding, quality assurance, and other processes. This has enabled the production of high quality electric resistance welded steel pipe with ultra-heavy wall thicknesses in a wide range of sizes. The new advances that comprise this manufacturing technology are presented in this report.